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FOC | Family List | FOC Vol. 17 | Lamiaceae

33. Lamium Linnaeus, Sp. Pl. 2: 579. 1753.

野芝麻属 ye zhi ma shu

Herbs annual or perennial. Stem leaf blades circular or reniform to ovate-lanceolate, margin coarsely crenate or dentate-serrate. Verticillasters 4-14-flowered; floral leaves similar, much longer than verticillasters; bracts ± linear, early deciduous. Calyx tubular-campanulate to campanulate, 5- or 10-veined, ± hairy outside, throat slightly oblique or regular; teeth 5, subequal, subulate, as long as or longer than tube. Corolla purple-red, reddish, yellowish, to dirty white, 2-lipped, 2(-3) × as long as calyx, hairy outside; tube straight or incurved, cylindric or widened above annulus, subsaccate; upper lip erect, oblong, rounded or emarginate, ± galeate; lower lip spreading, 3-lobed; middle lobe obcordate, emarginate or 2-lobed; lateral lobes semicircular, margin crenate or dentate. Stamens 4, hairy, anterior 2 longer, ascending beneath upper lip; anther cells 2, divaricate. Ovary lobes apically truncate, glabrous or tuberculate, sometimes with a membranous margin. Style apex subequally 2-cleft.

About 40 species: Africa, Asia, Europe, introduced in North America; four species in China.

1 Corolla tube straight, cylindric, without hairy annulus inside; leaves circular to reniform, coarsely crenate to shallowly ± palmately lobed   1 Lamium amplexicaule
+ Corolla tube with hairy annulus near base inside, subsaccate beyond hairy annulus; leaves ovate to ovate-lanceolate.   (2)
2 (1) Corolla purple or dark purple; ovary lobes glabrous, with a membranous margin at apex   4 Lamium maculatum
+ Corolla white or yellowish; ovary lobes glabrous or tuberculate, without membranous margin at apex.   (3)
3 (2) All floral leaves subsessile   2 Lamium album
+ Lower floral leaves petiolate   3 Lamium barbatum

Lower Taxa


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