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Subfamily

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

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

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

Description

Shrubs or subshrubs, aromatic; stems numerous, glabrate to densely canescent, with simple or rarely dendroid hairs; leaves entire or toothed, glandular-punctate; inflorescence of 3-7-flowered, pedunculate to subsessile cymes, or flowers rarely solitary, in axils of bracts; bracts leaf-like; bracteoles inconspicuous; calyx actinomorphic and subequally 5-lobed, or 2-lipped (3/2) with lobes unequal, posterior free or connate, triangular, anterior usually narrower and longer, lobes connivent after anthesis, tube 13-15-nerved, cylindrical, straight, not saccate, throat irregularly or distinctly annulate, or lobes canescent within; corolla lilac or orange to red, 10-35 mm long, 2-lipped (2/3), posterior lip emarginate, hooded or flat, anterior lip spreading, median lobe often larger, tube short to elongate, straight, annulate within; stamens 2 fertile, posterior pair staminodal, anterior pair ascending under posterior corolla lip, included to exserted, thecae widely divaricate, distinct, connective well-developed; stigma-lobes unequal, subulate, anterior lobe longer; disc symmetrical; nutlets oblong, over 1.5 mm long, smooth, not mucilaginous.  2n = 36.  Seven spp, SW United States, Northern Mexico, Haiti.  Open, submontane or lowland, often xeric habitats. Irving (1972) recognizes two sections: sect Poliomintha, with tomentose, linear-oblong leaves, calyx usually 15-nerved, 3-4 mm long and annulate within; and sect. Saturejoides Irving, with canescent to glabrate, ovate to elliptic leaves, calyx 13-nerved, 5-12 mm long, exannulate.

Distribution

Native to:

73 Northwestern U.S.A.
76 Southwestern U.S.A.
77 South-Central U.S.A.
79 Mexico
81 Caribbean

Publication

Poliomintha A. Gray, Proc. Am. Acad. 8: 295 (1870); Irving, Sida 5(1): 8-22 (1972), rev.


Hedeoma sect. Poliomintha Briq. (1897).

Image resource

Royal Botanic Gardens, Kew

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