Urtica dioica subsp. holosericea
Aliso 6: 68. 1967.
Selected by author to be illustrated
Basionym: Species Nuttall
Synonyms: Species S. WatsonVariety (Nuttall) C. L. HitchcockVariety S. WatsonVariety (Jepson) JepsonSubspecies (Nuttall) W. A. WeberVariety (Nuttall) Jepson
Treatment appears in FNA Volume 3.
Revision as of 13:50, 27 July 2019 by FNA>Volume Importer
Stems softly pubescent, also with stinging hairs. Leaf blades abaxially sparsely to densely tomentose to moderately strigose, soft to touch, with stinging hairs, adaxially without or rarely with a few stinging hairs. Flowers unisexual, staminate and pistillate mostly on same plants. 2n = 26.
Phenology: Flowering late spring–summer.
Habitat: Alluvial woods, margins of deciduous or mixed woodlands, fencerows, waste places
Elevation: 0-3100 m
Distribution
Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo., Mexico.
Discussion
Urtica dioica subsp. holosericea is highly variable in leaf shape and degree of pubescence. The least pubescent plants appear to grade into U. dioica subsp. gracilis, and it is sometimes difficult to separate the two.
The name U. serra Blume has been misapplied to this taxon.
Selected References
None.
Lower Taxa
None.