Ronen Shtein

Tel Aviv University | TAU

A new species of medium-sized and upright-flowered Kalanchoe Adans. (Crassulaceae) from medium altitude moist evergreen forests in northern Madagascar is described and illustrated: K. apiifolia D.-P. Klein, Shtein & Callm. By its herbaceous habit, forming erect flowers with a short and indistinct calyx tube, ligulate nectary scales, and not possess...

The partial infrageneric classification systems proposed for Kalanchoe (Crassulaceae subfam. Kalanchooideae) by Boiteau and Boiteau & Mannoni during the mid-20th century are analysed. The pertinent work of Boiteau published in 1947, as subsequently elaborated on by Boiteau & Mannoni in the late-1940s, is assessed to clarify the use of infrageneric...

Apart from reproducing sexually through the production of seed that follows self- or cross-pollination and fertilisation, representatives of Kalanchoe (Crassulaceae subfam. Kalanchooideae) have evolved a range of different asexual reproductive strategies. Especially several species indigenous to Madagascar show pronounced asexual reproduction that...

Species included in Kalanchoe [subg. Bryophyllum] sect. Invasores (Crassulaceae subfam. Kalanchooideae), an infrageneric group naturally restricted to Madagascar, are, as the section name suggests, known to have several reproductive mechanisms that enable their successful establishment and spread in suitable climates in, and well away from, their n...

The 25 names, mostly at the rank of species, which were jointly published by Raymond-Hamet (1890–1972) and Henri Perrier de la Bâthie (1873–1958) in Kalanchoe (Crassulaceae subfam. Kalanchooideae) between 1912 and 1915, with a final name appearing in 1948, are catalogued. The current taxonomic status of the taxa, to which these names are applied, i...

The nomenclature that Perrier de la Bâthie and Boiteau & Mannoni successively published for the Malagasy K. miniata (Crassulaceae subfam Kalanchooideae) in the 1920s and 1940s, respectively, is analysed. New synonyms are recorded for K. miniata and designations not validly published are noted. The infraspecific names published in K. miniata by Perr...

A revision of the exclusively Malagasy Kalanchoe subg. Kitchingia (Crassulaceae subfam. Kalanchooideae) is presented, along with a detailed discussion of its history, nomenclature, taxonomy, and circumscription. We uphold Kalanchoe subg. Kitchingia as one of four subgenera that are presently recognised in the genus, the other three being the autony...

The identity of the Malagasy Kalanchoe rosei (Crassulaceae subfam. Kalanchooideae) is resolved, inter alia through a rigorous review and interpretation of the type of the name, as well as associated preserved and living material. Apart from the autonymic variety, K. rosei var. rosei, two further varieties were at times often recognised, i.e., K. ro...

Kalanchoe torrejacqii (Crassulaceae subfam. Kalanchooideae) is described as a new phyllo-bulbiliferous species. It occurs in the Namorona River valley, near Ranomafana, southern Madagascar. Differences between K. torrejacqii and the partially sympatric K. laxiflora are discussed and the new species is contrasted with representatives of the K. rosei...

Kalanchoe rosei (Crassulaceae subfam. Kalanchooideae) is a phyllo-bulbiliferous species endemic to southern Madagascar. Historically, two varieties, K. rosei var. seyrigii and K. rosei var. variifolia, have been recognised in K. rosei. One of the two specimens cited when K. rosei var. seyrigii was described bears much resemblance to K. peltigera. H...

Several species and nothospecies of Kalanchoe Adanson (1763: 248) (Crassulaceae subfam. Kalanchooideae) that use multiple vegetative and reproductive methods of self-propagation have become weedy in especially mild-climate parts of the world (Garcês et al. 2007, Herrera & Nassar 2009, Smith 2019, Smith et al. 2019: 244–278). Some of these, includin...

A new species of small, rosulate and upright-flowered Kalanchoe Adans. (Crassulaceae) from northeastern Madagascar is described and illustrated: Kalanchoe darainensis D.-P. Klein & Callm. Morphologically, Kalanchoe darainensis is most similar to Kalanchoe blossfeldiana Poelln. and Kalanchoe globulifera H. Perrier which are known from the northweste...

The taxonomy and nomenclature of Kalanchoe peltigera (Crassulaceae subfam. Kalanchooideae) and K. rosei var. seyrigii, a long-overlooked name published in the 1940s, are evaluated with an aim to resolve the taxonomic status and affinities of K. peltigera, which was described in the mid-2000s. In particular, the taxonomic status of K. peltigera as a...

The taxonomy and nomenclature of the species of Kalanchoe (Crassulaceae subfam. Kalanchooideae) with comparatively thin, weak, scrambling stems are reviewed and discussed. This group of climbers is endemic to Madagascar, the present-day and probable historic centre of species diversity of Kalanchoe. Bar one species, K. schizophylla, the Madagascan...

The nomenclature and taxonomy of the Madagascan Kalanchoe porphyrocalyx (Crassulaceae subfam. Kalanchooideae), which was originally described as Kitchingia porphyrocalyx, is discussed and clarified. The combination Kalanchoe porphyrocalyx var. sulphurea was validly published in 1948 by Boiteau & Mannoni, but K. porphyrocalyx var. sambiranensis was...

In the most recent synoptic treatment of Kalanchoe Adanson (1763: 248) (Crassulaceae subfam. Kalanchooideae), the name K. stearnii Raymond-Hamet (1941: 334), as ‘Stearni’, was interpreted as not having been validly published, with Turland et al. (2018: Art 32.1c) cited as the reason (Descoings 2003: 144). However, the name complied with the require...

The recently described Kalanchoe ×gildenhuysii Smith & Figueiredo (2020: 43) and K. ×hummeliae Smith (2020a: 91) both have K. millotii Hamet & Perrier de la Bâthie (1912: 374) as one parent, with the other parent being K. tomentosa Baker (1882: 110) and K. beharensis Drake del Castillo (1903: 41), respectively. These three species are shrubby or ar...