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Subfamily

VII. Subfam. Nepetoideae (Dumort.) Luerss. (1882).

VII. 3. Tribe Ocimeae Dumort. (1829).

VII. 3. B. Subtribe Hanceolinae (C.Y. Wu) A.J. Paton, Ryding & Harley, in Harley, Paton & Ryding, Kew Bull. 58: 485-489 (2003).

Description

Shrubs or herbs; leaves simple, opposite, rarely ternate; inflorescence thyrsoid with cymes pedunculate, bracteate, bracteolate, 3- to several-flowered; bracts persistent, not coloured, smaller than leaves; bracteoles small, usually linear; calyx campanulate, funnel-shaped, or tubular and sometimes slightly constricted or rarely curved at throat, actinomorphic or 2-lipped, 5-lobed (3/2 or regular), lobes lanceolate to deltoid, posterior never decurrent, throat open, glabrous; corolla strongly 2-lipped, 5-lobed (4/1), white, blue, pink or purplish, posterior lip ascending or reflexed, 4-lobed with lobes equal or rarely median more shallowly lobed, anterior lip horizontal, cucullate, corolla-tube straight or geniculate, saccate to spurred at base, parallel-sided distally; stamens 4, held within, or more rarely exceeding the anterior lip, posterior pair attached near base of corolla or between base and midpoint, usually with hairs, anterior pair attached between midpoint of corolla and throat, often with hairs; stigma-lobes diverging; disc 4-lobed with anterior lobe slightly larger, lobes alternating with nutlets; nutlets ovoid, rarely conical with a flattened base, glabrous, sometimes with hairs or glands, mucilaginous or not, areole small, inconspicuous.  2n = 24, 42.  Around 100 species, tropical Asia with two species in Africa.

Distribution

Native to:

22 West Tropical Africa
23 West-Central Tropical Africa
24 Northeast Tropical Africa
25 East Tropical Africa
26 South Tropical Africa
36 China
38 Eastern Asia
40 Indian Subcontinent
41 Indo-China

Synonyms

Rabdosia (Blume) Hassk., Flora 25(2 Beibl.): 25 (1842).

Dielsia Kudô, Mem. Fac. Sci. Taihoku Imp. Univ. 2: 143 (1929), nom. illeg.

Amethystanthus Nakai, Bot. Mag. (Tokyo) 48: 785 (1934).

Homalocheilos J.K.Morton, J. Linn. Soc., Bot. 58: 249 (1962).

Skapanthus C.Y.Wu & H.W.Li, Acta Phytotax. Sin. 13: 77 (1975).

Rabdosiella Codd, Bothalia 15: 9 (1984).

Publication

Isodon (Benth.) Schrader ex Spach, Hist. Nat. Vég. 9: 162 (1840); Li, J. Arnold Arbor. 69: 289-400 (1988), rev.; Paton & Ryding, Kew Bull. 53: 723-731 (1998).

Plectranthus L'Hér. sect. Isodon Schrad. ex Benth. (1832).

Plectranthus L'Hér. sect. Melissoides Schrad. ex Benth. (1832).

Plectranthus L'Hér. sect. Pyramidatum Schrad. ex Benth. (1832).

Plectranthus L'Hér. sect. Amethystoides Schrad. ex Benth. (1832).

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Species found in RBG Kew living collections

1969-19330 Isodon pharicus (Prain) Murata    P 157 14 

Image resource

© Royal Botanic Gardens, Kew