Kalanchoe [subg. Kalanchoe] sect. Kalanchoe, Adanson, 1763

Smith, Gideon F., 2023, A review of the infrageneric classifications proposed for Kalanchoe (Crassulaceae subfam. Kalanchooideae) from the earliest times up to 2000, Phytotaxa 619 (1), pp. 1-38 : 20-22

Kalanchoe [subg. Kalanchoe] sect. Kalanchoe .

Type:— Kalanchoe laciniata ( Linnaeus 1753: 430) Candolle (1802 : t. 100).

Finally, Maire proposed a designation at the rank of subgenus, “ K. subg. Kitchingia ” Maire (1977: 263). However, this designation was not validly published as he only stated: “Subgen. Kitchingia BAKER (1881) , ut genus”. Maire (1977: 263) therefore omitted a reference to the page on which Kitchingia was published ( Turland et al. 2018: 102, Art. 41.5) ( Table 9 , row II).

See ‘2. The infrageneric classification of Kalanchoe of Baillon (1885) ’, above, for the full and correct citation of the genus Kitchingia when treated at the rank of subgenus in Kalanchoe .

Maire (1977: 263–269) did not propose or publish any infrageneric names in K. subg. Bryophyllum , nor in K. subg. Kitchingia ( Table 9 , rows II and III).

None of the infrageneric names proposed by Maire (1977) was validly published. The species and infraspecific taxa treated by Maire (1977: 251–269) are given in Table 9 .

12. The informal infrageneric classification of Kalanchoe used by Pierre L. Boiteau and L. Allorge-Boiteau (1995)

Smith & Figueiredo (2019d) and Smith (2021c) provided a detailed analysis of the 13 nomenclatural novelties, species and infraspecific taxa (varieties and forms), published in Kalanchoe by Boiteau & Allorge-Boiteau in 1995. In some cases combinations were published inadvertently. However, the infrageneric classification system used by these authors was not dealt with in detail by Smith & Figueiredo (2019d) and Smith (2021c). This is done here.

Pierre L. Boiteau (1911–1980) was the director of the Jardin Botanique de Tsimbazaza in Antananarivo, Madagascar, from 1935 to 1947, at which time he left that country and returned to France ( Dorr 1997: 47). He collected and cultivated virtually all of the Malagasy kalanchoes known at the time, including many of the lesser known species, obviously aiming his collecting at, inter alia, a taxonomic treatment of the genus in Madagascar ( Dorr 1998: 232). The publication of Boiteau & Allorge-Boiteau (1995), which is rooted in the work of the elder Boiteau—Lucile Allorge-Boiteau is his daughter—that was initiated in Madagascar in the 1930s–1940s, is the result. After Pierre Boiteau died on 1 September 1980, Lucile Allorge-Boiteau revisited and redrafted his work on the Malagasy kalanchoes and prepared it for publication ( Dorr 1998: 232).

Boiteau & Allorge-Boiteau (1995) recognised 60 Malagasy species of Kalanchoe , as well as almost as many infraspecific taxa. The species recognised are spread across what they referred to as 15 natural groups [“Groupes naturels…”] ( Boiteau & Allorge-Boiteau 1995: 16 [page unnumbered], 33–38). However, these “natural groups” were not given formal nomenclatural status.

Note that Boiteau & Allorge-Boiteau (1995: 16 [page unnumbered]) should be read with great care as the contents and layout of the Table included on that page [16] do not coincide with the section-based species treatments found later in the book, especially from “Groupe IX, Alpestres” onwards.

Boiteau & Allorge-Boiteau (1995) recognised the same three sections [ K. sect. Kalanchoe , K. sect. Kitchingia , and K. sect. Bryophyllum ] that Boiteau (1947) accepted ( Table 10 ) (see also ‘8. The infrageneric classification of Kalanchoe of Pierre L. Boiteau (1947) ’, above), i.e., what is here treated as: (1) K. subg. Kalanchoe , (2) K. subg. Bryophyllum , and (3) K. subg. Kitchingia .

Boiteau & Allorge-Boiteau (1995) did not—and did not intend to—formally publish names for any of the infrageneric units they recognised in Kalanchoe .