VII. Subfam. Nepetoideae (Dumort.) Luerss. (1882).
VII. 1. Tribe Elsholtzieae (Burnett) Sanders & Cantino (1984).
Perennial herbs often with citrus-like odour; leaves rather large, opposite or subverticillate, coarsely toothed; inflorescence of 2-flowered verticillasters, raceme-like, ebracteolate; bracts usually small, persistent; calyx campanulate, lobes often subequal, lanceolate-subulate to deltoid, sometimes posterior lip shorter, median lobe rarely minute, lobes often slightly upcurved in fruit, calyx-tube obscurely (5-)10-nerved, throat hairy, often annulate; corolla white, yellowish or purplish, anterior lip with median lobe flat, entire to laciniate, corolla-tube infundibular to subcylindric, annulate or not, usually long-exserted; stamens 4, didynamous, or 2 (posterior pair reduced to staminodes), long-exserted or rarely included, thecae divergent to weakly divaricate, often slightly confluent at apex; nutlets 1(-2) by abortion, globose or subglobose, glabrous, smooth or faintly reticulate. 2n = 50, 52. About ten species of woodland and montane forest, four spp. in Eastern North America and about six species in China and Japan, with one endemic species in Taiwan.
Native to:36 China38 Eastern Asia72 Eastern Canada74 North-Central U.S.A.75 Northeastern U.S.A.78 Southeastern U.S.A.
Hypogon Raf., Fl. Ludov.: 148 (1817).
Diallosteira Raf., Neogenyton: 2 (1825).
Pleuradenia Raf., Neogenyton: 2 (1825).
Keiskea Miq., Ann. Mus. Bot. Lugduno-Batavi 2: 105 (1865).
Micheliella Briq. in H.G.A.Engler & K.A.E.Prantl, Nat. Pflanzenfam. 4(3a): 325 (1897).
Collinsonia L., Sp. Pl. 1: 28 (1753); L., Gen. Pl. ed. 5: 16 (1754).
Species found in RBG Kew living collections
1965-10702 Collinsonia canadensis L. PERR 166 07
© Royal Botanic Gardens, Kew