Kalanchoe darainensis (Crassulaceae), a new species from northeastern Madagascar Author Klein, David-Paul Humboldt-Universität zu Berlin, Späthstrasse 80 / 81, Berlin D- 12437, Germany david-paul.klein@agrar.hu-berlin.de Author Shtein, Ronen The Steinhardt Museum of Natural History, Tel Aviv University, Klausner St 12, Tel Aviv-Yafo, Israel Author Nusbaumer, Louis Conservatoire et Jardin botaniques de Genève, ch. de l’Impératrice 1, C. P. 71, 1292 Chambésy, Switzerland Author Callmander, Martin W. Conservatoire et Jardin botaniques de Genève, ch. de l’Impératrice 1, C. P. 71, 1292 Chambésy, Switzerland text Candollea 2021 2021-03-22 76 117 123 journal article 3706 10.15553/c2021v761a12 556a22a2-fc8c-4750-850a-b6a131a8948d 5645196 Key to Kalanchoe darainensis and allied species 1. Plants perennial, soboliferous; indumentum absent to partial; leaves ovate-oblong, obovate or orbicular, never lobed; flowers golden yellow or scarlet red .................. 2 1a. Plants predominantly annual, non-soboliferous; indumentum partial to complete; leaves ovate-lanceolate to linear, often lobed, rarely bi-lobed; flowers whitish to golden yellow .......................................................................... 4 2. Flowers yellow, few (7 to 10); leaves subsessile; indumentumsparsely glandular, restrictedtostemandpeduncle. ................................................................. K. globulifera 2a. Flowers scarlet, numerous; leaves petiolate to subsessile; indumentum absent or partially densely glandular, restricted to leaves, stem and peduncle ........................ 3 3. Indumentum absent; leaf blades ovate-oblong, apically obtuse to acute; inflorescences numerous, terminal and axillary, many-flowered thyrses ............. K. blossfeldiana 3a. Indumentum densely glandular, restricted to leaves, stem and peduncle; leaf blades ovate, elliptic to orbicular, apically rounded-obtuse; inflorescences single, terminal, many-flowered dichasial cymes .............. K. darainensis 4. Sepals and corolla especially thick and fleshy; glandular hair thick-stalked, extends to the upper part of the stem, young leaves, inflorescence, and sepals; flowers whitish cream-yellow ........................................... K. pareikiana 4a. Sepals and corolla not thick or fleshy; glandular hair slender-stalked, complete, i.e. extends from the base of the stem to the petals; flowers golden yellow ............... 5 5. Leaves alternate basally, decussate higher up; petals suboblong, retuse, i.e. rounded-obtuse and notched; filaments 6.5–8.5 mmin length, freefor> ⅓ of their length, papillose; anthers fully exserted, wider than long, lacking connective glands ............................................. K. briquetii 5a. Leaves decussate; petals ovate, apically acute to acuminate; filaments 10–13 mmin length, freefor <1/10 of their length, non-papillose; anthers partially to fully included, longer than wide, dressed with ± spherical connective glands .......................................................................... 6 6. Plants perennial; leaves 3- to 5-partite, occasionally bilobed and petiolulate; leaf or leaflet blades oblong to linear; margins obtusely crenate-sinuate; petals strongly acuminate with an acumen 3.5–4.5 mm long; styles much longer than carpels .................................... K. chapototii 6a. Plants annual; leaves 1- to 3-partite, if lobed not bi-lobed nor petiolulate; leaf or leaflet blades ovate to lanceolate; margins entire to minutely crenate-sinuate; petals acuminate with an acumen 1.2–2 mm long; styles much shorter than carpels ................................................................. 7 7. Leaves unlobed; leaf or leaflet blades ovate, apically subobtuse; styles> 2 times shorterthan carpel ...... K. boisii 7a. Leaves 3-partite; leaf or leaflet blades ovate-lanceolate, apically acuminate-acute; styles <2 times shorter than carpel ...................................................... K. antennifera