All Floras      Advanced Search
FNA Vol. 3 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 3 | Urticaceae

2. Hesperocnide Torrey, Pacif. Railr. Rep. 4(5): 139. 1857.

[Greek hesperos, west, and knide, nettle]

Herbs , annual, with stinging and nonstinging hairs. Stems usually branched, erect, spreading, or reclining. Leaves opposite; stipules present. Leaf blades ovate to broadly ovate, distal blades sometimes broadly elliptic, margins serrate; cystoliths elongate. Inflorescences axillary, globose, nearly globose, or elongate-racemose or paniculate. Flowers unisexual, staminate and pistillate in loose to dense clusters in same inflorescence; bracts absent. Staminate flowers: tepals 4, distinct, equal; stamens 4; pistillode present. Pistillate flowers: tepals 4, connate, forming persistent saclike structure covered with delicate, hooked hairs and completely enclosing mature, flattened achene; staminodes absent; style absent, stigma tufted, persistent. Achenes subsessile, laterally compressed, ovoid, tightly enclosed in persistent tepals. x = 12.

Species 2 (1 in the flora): 1 in California and Mexico, 1 in Hawaii.


Woodland, D. W., I. J. Bassett, and C. W. Crompton. 1976. The annual species of stinging nettle (Hesperocnide and Urtica) in North America. Canad. J. Bot. 54: 374-383.

Lower Taxon


 |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |