Mark Strong

Smithsonian Institution · Department of Botany

Three new species of Cyperaceae are described and illustrated from the Cuyuni-Mazaruni Region of Guyana, South America: Cephalocarpus glabra M. T. Strong, Everardia spongiosa M. T. Strong, and Scleria attenuatifolia M. T. Strong. Comparisons to similar taxa are discussed for each.

Incluye bibliografía e índice

Studies of the floral morphology of the Mexican endemics Scirpus analecta Beetle and Scirpus coahuilensis Svenson, including embryo morphology and scanning electron microscopy (SEM) studies of the achenes, achene pericarp, and perianth bristles, indicate that like Scirpus L.,they are members of the tribe Scirpeae Knuth ex Dumortier. However, they w...

Acevedo-Rodríguez, Pedro and Mark T. Strong. Monocots and Gymnosperms of Puerto Rico and the Virgin Islands. Contributions from the United States National Herbarium, volume 52: 415 pages (including 65 figures). The present treatment constitutes an updated revision for the monocotyledon and gymnosperm flora (excluding Orchidaceae and Poaceae) for th...

The new species, Rhynchospora belizensis, is described, illustrated, and compared with phylogenetically closely related and morphologically similar species. Rhynchospora belizensis is known only from southern Belize, where it inhabits sunny, very wet, nutrient-poor, peaty ground of graminoid-dominated, gently sloping hillside seepages. It is unique...

We present relevant data about the taxonomy, nomenclature, and chorology of nine species of the genus Carex from the Neotropics. We provide two new records for the South American continent, one of them an introduced species in Argentina and Uruguay (C. divisa), and the other an apparently naturally occurring species in Venezuela (C. buxbaumii), two...

The vascular plants of the Americas Botanical exploration in the Americas has a history that stretches back for half a millennium, with knowledge assembled in diverse regional floras and lists. Ulloa Ulloa et al. present a comprehensive and integrated compilation of all known native New World vascular plant species (see the Perspective by Givnish)....

The current study examines all genera of Sapindaceae tribe Paullinieae sensu Acevedo-Rodríguez et al. (2011). Based on molecular phylogenetic analyses of trnL intron and ITS sequence data along with critical evaluation of morphology, supertribe Paulliniodae is newly recognized and morphologically characterized by zygomorphic flowers, thyrses with l...

Result of the trip in Venezuela of young Albert Gaillard (1858-1903), this partial herbarium contains however many taxa of interest, including new species described by Maury.

Acevedo-Rodríguez, Pedro and Strong, Mark T. Catalogue of Seed Plants of the West Indies. Smithsonian Contributions to Botany, number 98, xxv + 1192 pages, 3 maps, 4 tables, 2012.—The catalogue enumerates all taxa of Gymnosperms, Dicotyledons, and Monocotyledons occurring in the West Indies archipelago excluding the islands off the coast of Venezue...

A total of 519 plant taxa have been added to the known flora of Great Falls Park, Fairfax County, Virginia, since the vascular flora was first published more than 30 yr ago. Species erroneously reported from the Park are noted. To date, 1,015 vascular plant taxa representing 1,002 species, eight infraspecific taxa, and five hybrids from 492 genera...

Comparison of the common floristic elements between the West Indies and the surrounding continents shows a mosaic of affinities that are stronger to Central America and South America as a whole than with either one of them separately or with North America. However, since only 28% of the total West Indian seed plant flora is shared with other geogra...

The new species, Scleria tropicalis M. T. Strong, is described and illustrated. Its classification is determined and its relationship to a closely related taxon discussed.

The new species Rhynchospora guaramacalensisM.T.Strong is described in Rhynchosporasection Paniculatae Boeck. (Cyperaceae) from Trujillo State, Venezuela. An illustration is provided and discussion of differences between it and R. macrochaeta ,a closely related taxon, is given.

Two new species are described (R. cordatachenia and R. saxisavannicola) in Rhynchospora sect. Tenues Kükenthal from northeastern South America (Guianas). A key to the species of R. sect. Tenues in the Guianas is given, and illustrations are provided for the new species.

Five new species are described (R. angustipaniculata, R. ayangannensis, R. bakhuisensis, R. donselaarii, and R. rupicola) and a new name proposed (R. pubisquama) in Rhynchospora Vahl nom. cons. from northeastern South America (Guianas). Illustrations are provided for the new species, their classification is determined, and a discussion of related s...

Strong, M. T. (Smithsonian Institution, Department of Botany, MRC-166, Washington, DC 20560-0166, U.S.A.). A new species of Rhynchospora section Tenues Kukenthal (Cyperaceae) from Puerto Rico. Brittonia 52: 241-245. 2000.-Rhynchospora depressirostris M. Strong, an overlooked species of Rhynchospora sect. Tenues Kukenthal, previously treated in the...

Rhynchospora zacualtipanensis M. Strong and Eleocharis moorei M. Strong and S. Gonzalez, from eastern Mexico, are described and illustrated. Their relationships to closely allied and morphologically similar species are discussed.

One new species of Abildgaardia, A. papillosa, and seven of Bulbostylis, are described and illustrated, and their relationships to closely allied species are discussed. In addition, an updated description of the genus along with a key to the species of New World Abildgaardia is provided.

The genus Machaerina Vahl (Cyperaceae) now consists of five species in South America. A key to the taxa, a description of the genus and each taxon, nomenclature, and an illustration of the mature fruit (achene) for each taxon are provided, and the distribution of each taxon is mapped. Two new species, Machaerina ayangannensis M. T. Strong from Guya...

Scleria amazonica Camelbeke, Strong & Goetghebeur, from Amazonas, Venezuela, is described and illustrated. It differs from other South American species of Scleria in the presence of unisexual inflorescences. Among species of Scleria from the Venezuelan Guayana region it differs in the following combination of characters: the presence of a conspicuo...

Bulbostylis splendens from Brazil is described, illustrated, and compared to a related taxon.

Two new species are described: Scleria skutchii M. T. Strong & J. R. Grant, a scrambling, vinelike, branching, high-climbing sedge with sharp, spinulose leaf margins, pendulous inflorescences of purple spikelets, a long-stipitate hypogynium, and achenes with a curved apex, from Costa Rica and northwestern Colombia, related to S. macbrideana Gross;...

Results from a recent taxonomic treatment of species of Scirpus sensu lato occurring in Virginia indicate that they are a heterogeneous group. Three segregate genera are recognized as occurring in Virginia: Scirpus sensu stricto, Trichophorum, and Schoenoplectus. The transfer of four species to Schoenoplectus is made. These combinations are made pr...

New species combinations are made inBulbostylis,B. schomburgkiana andB. truncata from South America. A description, illustration, SEM photo of the fruit (achene), and comparison to related taxa are provided for each species.

Thesis (Ph. D.)--George Mason University, 2004. Includes bibliographical references (leaves 324-329). Photocopy.