EcoFlora - Urtica

Urtica
Family: Urticaceae Cecelia Alexander	FNA VPAP Gleason & Cronquist Resources David E. Boufford in Flora of North America (vol. 3) Herbs , annual or perennial, with stinging and nonstinging hairs on same plant. Stems simple or branched, erect, ascending, or sprawling. Leaves opposite; stipules present. Leaf blades elliptic, lanceolate, ovate, or orbiculate, margins dentate to serrate; cystoliths rounded or ± elongate. Inflorescences axillary, lax, of cymes arranged in racemes or panicles. Flowers unisexual, staminate and pistillate flowers in loose to tight clusters in separate inflorescences or intermixed in same inflorescence on same or different plants; bracts narrowly triangular to lanceolate, lacking hooked hairs. Staminate flowers: tepals 4, distinct, equal; stamens 4; pistillode cuplike. Pistillate flowers: tepals 4, distinct, inner 2 equal to achene, outer 2 smaller, without hooked hairs; staminodes absent; style absent; stigma tufted, persistent or deciduous. Achenes sessile, laterally compressed, ovoid or deltoid, loosely enclosed by inner tepals. x = 12, 13. JANAS 26(1) PLANT: Erect, ascending, or sprawling, monoecious or dioecious, annual or perennial herbs with stinging and non-stinging hairs. LEAVES: opposite, stipulate, the blades elliptic, lanceolate, ovate to broadly ovate, or circular, dentate to serrate, with punctiform or more or less elongate cystoliths. INFLORESCENCE: axillary, of cymes arranged in lax racemes or panicles, or in loose to tight clusters, staminate and pistillate flowers in separate inflorescences, or staminate and pistillate flowers alternately arranged in the same inflorescence. STAMINATE FLOWERS: with 4 equal tepals, 4 stamens, and a rudimentary, cuplike ovary. PISTILLATE FLOWERS: with 4 tepals (the 2 outer smaller, at least in fruit); style absent; stigmas tufted. FRUIT: flattened, ovoid or deltoid, loosely enclosed by the inner tepals, the stigmatic tuft deciduous or persistent on the mature fruit. NOTES: A genus of about 45 spp. indigenous to temperate areas of both hemispheres. Woodland, D. W. 1982. Syst. Bot. 7:269 281. Woodland, D. W. 1982. Syst. Bot. 7:282 290. Woodland, D. W., I. J. Bassett, & C. W. Crompton. 1976. Canad. J. Bot. 54:374 383. (Latin: based on urere = to burn). REFERENCES: Boufford, David E. 1992. Urticaceae. Ariz.-Nev. Acad. Sci. 26(1)2. Vascular plants of NE US and adjacent Canada Dioecious or monoecious; male fls with 4 subequal sep, 4 stamens, and vestigial ovary; sep of the female fls unequal, the outer 2 small and inconspicuous; stigma capitate-tufted; fr a lenticular achene enclosed by the 2 inner sep; herbs with opposite lvs, ±beset with stinging bristles; fls minute, in panicles, spikes, or head-like clusters from the upper axils. 25, widespread. Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp. ©The New York Botanical Garden. All rights reserved. Used by permission.
Species within checklist: Axton Ranch Mountain Park \|\| << 1 - 50 taxa >> Urtica angustifolia Map not Available Urtica aquatica Map not Available Urtica ardens Map not Available Urtica baccifera Media not available Map not Available Urtica ballotifolia Map not Available Urtica canadensis Map not Available Urtica cannabina Map not Available Urtica chamaedryoides Map not Available Urtica circularis Map not Available Urtica dioica Map not Available Urtica domingensis Media not available Map not Available Urtica echinata Map not Available Urtica ferox Map not Available Urtica flabellata Media not available Map not Available Urtica glomerata Map not Available Urtica glomeruliflora Media not available Map not Available Urtica gracilenta Map not Available Urtica gracilis Map not Available Urtica grandidentata Media not available Map not Available Urtica grandis Media not available Map not Available Urtica granulosa Map not Available Urtica herniarioides Media not available Map not Available Urtica hyperborea Map not Available Urtica incisa Map not Available Urtica interrupta Map not Available Urtica kioviensis Map not Available Urtica laetevirens Map not Available Urtica leptophylla Map not Available Urtica magellanica Map not Available Urtica massaica Map not Available Urtica membranacea Map not Available Urtica mexicana Map not Available Urtica morifolia Map not Available Urtica nivea Media not available Map not Available Urtica nummulariifolia Media not available Map not Available Urtica parietaria Media not available Map not Available Urtica pilulifera Map not Available Urtica platyphylla Media not available Map not Available Urtica portosanctana Media not available Map not Available Urtica pubescens Media not available Map not Available Urtica pumila Map not Available Urtica purpurascens Map not Available Urtica rotundifolia Media not available Map not Available Urtica simensis Media not available Map not Available Urtica spatulata Media not available Map not Available Urtica spirealis Media not available Map not Available Urtica stachyoides Map not Available Urtica subincisa Map not Available Urtica thunbergiana Map not Available Urtica triangularis Map not Available