Lamium L.

HENBIT

Annual or perennial herbs with simple more or less cordate leaves. Flowers terminal, arranged in bracteate clusters. Calyx tubular to campanulate with 5 more or less similar acute lobes. Corollas purplish, exceeding the calyx, strongly 2-lipped, the lower lip 3-lobed. Stamens 4, the anterior pair longer, the divaricate anthers often pubescent. Ovary deeply 4-lobed. Nutlets smooth to tuberculate. Base chromosome number, x = 9.

According to Fernald (1950: Gray's Manual), the generic name derives from an old Latin name of nettle-like plants mentioned by Pliny.

REFERENCES

Bernstrom, P. 1950. Cleisto- and chasmogamic seed setting in di-and tetraploid Lamium amplexicaule . Hereditas 36: 492-506.

Lord, E.M. 1980. Physiological controls on the production of cleistogamous and chasmogamous flowers in Lamium amplexicaule  L. Ann. Bot. 44: 757-766.

A genus of about 40 species, all of these native to the Old World, but several now common world-wide weeds in disturbed areas. Two species occur in Texas, both of these introduced. Lamium amplexicaule  is especially abundant in Texas, occurring as a spring weed in lawns everywhere.

Images of Texas Species of Lamium

Both images for each species are the same. The smaller images (approximately 670k) will load faster; the larger images (approximately 7.5M) are available for more detailed review but take longer to load.

L. amplexicaule 
amplexicaule 661k
amplexicaule 7.35M
L. purpureum 
purpureum 685k
purpureum 7.62M

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