Morphological characters of the seed coat in selected species of the genus Hypericum L. and their taxonomic value

Abstract

Eight Hypericum species are native to Poland: H. elegans Stephan ex Willd., H. hirsutum L., H. humifusum L., H. maculatum Crantz, H. montanum L., H. perforatum L., H. pulchrum L., and H. tetrapterum Fr. Only seeds of H. elegans were investigated in detail in Poland before, so here we present results of qualitative and quantitative analyses of seed morphology of the other 7 species, based on characters like seed length, width, and shape, seed coat sculpture, shape of epidermal cells of the testa, and number of epidermal cells along the seed axis. The results show that seeds of the studied species are small, 0.56-1.15 mm long and 0.26-0.49 mm wide. In SEM images, seed coat sculpture is reticulate in 5 species, papillate in H. hirsutum, and cup-shaped in H. pulchrum. The differences are caused by the varied final development of the testa epidermis, which constitutes the outer layer of the seed coat. The mean number of epidermal cells along the seed axis ranges from 22 to 33. Results of cluster analysis, based on the agglomeration method and including also published data on seeds of H. elegans, show that the variation in the investigated characters of seeds is reflected in the taxonomic division of the genus into sections.

Full text

©
BRC




Hypericum 




Abstract.Hypericum   H. elegans  H. hirsutum  H. humifusum 
H. maculatum  H. montanum  H. perforatum L. H. pulchrum H. tetrapterum H. elegans




H. hirsutumH. pulchrum

H. elegans
 
Key words:
 
1. Introduction
Hypericum
 
ü



  Hypericum 


 Hypericum



   
Hypericum






    
   
   





 

et al.


 Hypericum   
      


H. elegans



Fig. 1.Hypericum
H. hirsutumH. humifusumH. maculatumH. montanumH. perforatumH. pulchrumH. tetrapterum
 

Hypericum 
i
ii

iii

2. Material and methods
 
Hypericum
H. hirsutum  H. humifusum  H. maculatum 
H. montanum  H. perforatum L. H. pulchrum 
H. tetrapterum 



H
pulchrum 
et
al. 
 

    
    
   

  
  


    


Table 1.Hypericum
  
H. hirsutum  
H. humifusum 



H. maculatum  
H. montanum  
H. perforatum  
H. pulchrum  
H. tetrapterum 



Hypericum 

3
Fig. 2.Hypericum


 


    

 2013).    

   
   









  H. elegans

    


3. Results

Hypericum 
 Hyperi-
cum





  H. humifusum 
H. perforatum and H. pulchrum

H. perfora-
tum and H. pulchrum


 




Hypericum hirsutum
  





  


    






Fig. 3.Hypericum

 H. hirsutum  H. humifusum  H. macula-
tumH. montanumH. perforatum H. pulchrumH.
tetrapterum
A B
 
 


Hypericum 




Hypericum humifusum 
    






   
  



Hypericum maculatum 
   










Hypericum montanum 
    




   

   
    


Hypericum perforatum 
   
  
  












Hypericum pulchrum
    
   
   



   
   



 


Hypericum tetrapterum 
Hypericum acutum 
 




    






 


H. hirsutum and H. pulchrum
H. humifusum




     
Hypericum



H. hirsutum
H. pulchrum



Fig. 4.Hypericum

  H. hirsutum  H. humifusum H. macula-
tumH. montanum H. perforatumH. pulchrum H.
tetrapterum
A B
 
 


Hypericum 


Fig. 5.Hypericum
  H. hirsutum  H. humifusum H. macula-
tumH. montanum H. perforatumH. pulchrum H.
tetrapterum
A B
 







H. humifusum
3
   
H. perforatum


   
H. tetrapterum
    

H. montanum
H. maculatum

H. elegans
Table 2.Hypericum  
 
(

 
H. elegans   
H. hirsutum   
H. humifusum   
H. maculatum   
H. montanum   
H. perforatum   
H. pulchrum   
H. tetrapterum   

Fig. 6.Hypericum
H. elegansH. hirsutumH. humifusumH. maculatumH. montanumH. perforatumH. pul-
chrumH. tetrapterum
4. Discussion
    
Hypericum


on Hypericum 
  




H
maculatum and H. hirsutum  
     

Hypericum 







   


   


 

H. hirsutum and
H. pulchrum  Taeniocarpium
H. humifusum
Oligostema    
Hypericum H. mon-
tanum  Adenosepalum 





 
Hy-
pericum 
   

References
Alonso M. A., Agulló J. C., VillAr J. l., JuAn A. & Crespo
M. B.Hyperi-
cum ericoidesHCoridium

Bojňanský V. & FargašoVá a.
  

CroCkett s. & roBson n.  
  Hypericum 


HAgeMAnHypericum empetri-
folium     

kaźmierCzakowa r., BloCh-orłowska j., Celka z., Cwener
a., DajDok z., miChalska-hejeDuk D., Pawlikowski
P., szCzęśniak e. & ziarnek k. 2016. 


mártonFi P. 2008. Hypericum dubium   

meseguer a. s. & sanmartín i.
Hypericum   
   

nürk
Hypericum 


nürk n. m. & Blattner F. r.  
 Hypericum 
 
roBson n. k. B.Hypericum 
  


roBson n. k. B.Hypericum


roBson n. k. B.Hypericum
MyriandraElodes.

roBson n. k. B.Hypericum
 Hypericum 
HypericumHypericum

roBson n. k. B.Hypericum 
Olympia 
Crossophyllum.  
roBson n. k. B.    Hypericum
  Hirtella  
Coridium 
statsoFt, inC.
 

steVensk. kuBitzki


szkuDlarzHyperi-
cum elegans

warD j. h.    
 
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