Subfamily
VII. Subfam. Nepetoideae (Dumort.) Luerss. (1882).VII. 3. Tribe Ocimeae Dumort. (1829).
VII. 3. D. Subtribe Ociminae (Dumort.) Schmidt in Martius (1858).
Subtribe Moschominae Endlicher (1838).
Description
Herbs, sometimes geoxylic, not or faintly aromatic; leaves simple; inflorescence thyrsoid, lax or more rarely condensed with cymes sessile, usually >3-flowered, more rarely 3-flowered; bracts persistent, often basally coloured; calyx tubular, campanulate or urceolate, curving upwards or straight, 2-lipped, 2- to 8-lobed (1-3/1-5), lobes unequal, posterior lip entire with rounded or acute apex or 3-lobed, with posterior lobe decurrent or not, anterior lip entire and rounded, emarginate, 2-toothed or 5-toothed, if entire then closing calyx throat in fruit; corolla 2-lipped, 5- or 4-lobed (3-4/1), white, pink or blue, posterior lip ascending, 3-4-lobed, anterior lip horizontal, entire, slightly concave, corolla-tube straight, dorsally gibbous at midpoint or spurred near base, dilating towards throat; stamens 4, declinate or spreading, exserted, posterior pair attached around midpoint of corolla, basally pubescent and swollen, sometimes appendiculate, anterior pair attached at corolla throat or near midpoint; stigma-lobes equal, linear; disc 4-lobed with anterior lobe larger; nutlets ovoid, minutely striate, usually weakly mucilaginous when wet. 2n = 14, 18, 28, 30, 42, 48. Forty-five species in Tropical Africa and Asia, also in Australia (Queensland), grassland, open woodland often in wet areas.Distribution
Native to:
22 West Tropical Africa23 West-Central Tropical Africa24 Northeast Tropical Africa25 East Tropical Africa26 South Tropical Africa27 Southern Africa29 Western Indian Ocean36 China38 Eastern Asia40 Indian Subcontinent41 Indo-China42 Malesia43 Papuasia50 Australia
Synonyms
Mesona Blume, Bijdr.: 838 (1826).
Acrocephalus Benth., Edwards's Bot. Reg. 15: t. 1282, 13 (1829)., pro parte quoad African and Madagascan species (1830).
Geniosporum Wall. ex Benth., Edwards's Bot. Reg. 15: t. 1300 (1830).
Nosema Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 73: 20 (1904).
Limniboza R.E.Fr., Wiss. Erg. Schwed. Rhod.-Kongo Exped. 1: 277 (1916).
Hemsleia Kudô, Mem. Fac. Sci. Taihoku Imp. Univ. 2: 142 (1929).
Ceratanthus F.Muell. ex G.Taylor, J. Bot. 74: 3 (1936).
Octomeron Robyns, Bull. Jard. Bot. État 17: 28 (1943).
Publication
Platostoma P. Beauv., Fl. Oware 2: 61, t. 95 (1818); Paton, Kew Bull. 52: 257-292 (1997), rev.
Image resource
© Royal Botanic Gardens, Kew