ABCDEFGHIJKLMNOPQRSTUVWXYZ

Subfamily

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

VII. 2. Tribe Mentheae Dumort. (1827).

VII. 2. B. Subtribe Menthinae (Dumort.) Endl. (1838).

Description

Annual or perennial herbs or subshrubs, strongly aromatic; leaves entire or toothed; inflorescence of few- to many-flowered, pedunculate to subsessile cymes, or flowers rarely solitary, in axils of bracts, upper cymes often congested in a terminal spiciform thyrse; bracts often leaf-like; bracteoles inconspicuous; flowers sometimes cleistogamous; calyx ± actinomorphic, subequally 5-lobed, or 2-lipped (3/2) with lobes unequal, posterior somewhat connate, deltoid to subulate, anterior lobes usually longer, tube 13-nerved, cylindrical to infundibular, often gibbous at base, throat densely hairy within; corolla white, lilac, pink or orange-red, 2-lipped (2/3), posterior lip sometimes subentire, concave to flat, erect or spreading, median anterior lobe usually larger, often emarginate, tube short to elongate, widening upwards, annulate or not within; stamens 2, posterior pair staminodal, anterior pair ascending under posterior corolla lip, included to exserted, thecae ± parallel to widely divaricate, distinct, connective well-developed; stigma-lobes unequal, ± subulate, posterior very small; disc symmetrical; nutlets ovoid to oblong, usually 1.5 mm long or less, areolate to foveate, sometimes glaucous, often mucilaginous. 2n = 34, 36, 44, 72, 76, 144.  About 42 species, from Canada southwards to Mexico, Central and Southern S America, from Peru and Bolivia to S Brazil, Uruguay and Argentina.  Open montane or submontane, sometimes xeric habitats. Irving (1980) recognizes four subgenera, based mainly on habit and reproductive characters.

Distribution

Native to:

71 Western Canada
72 Eastern Canada
73 Northwestern U.S.A.
74 North-Central U.S.A.
75 Northeastern U.S.A.
76 Southwestern U.S.A.
77 South-Central U.S.A.
78 Southeastern U.S.A.
79 Mexico
80 Central America
83 Western South America
84 Brazil
85 Southern South America

Synonyms

Pseudocunila Brade, Rodriguésia 7(16): 27 (1944).

Publication

Hedeoma Pers., Syn. Pl. 131 (1807); Irving, Sida 8(3): 218-295 (1980), rev.

top

Image resource

© Royal Botanic Gardens, Kew