Urtica dioica L.

Family: Urticaceae

Pertinent Synonyms & Notes (particularly those used in California; go to GRIN for other synonyms)

only ssp. holosericea (Nutt.) Thorne is in the table grape area

Pertinent Common Names (particularly those used in California; go to GRIN for other common names)

stinging nettle, hoary nettle

Primary Disseminule Type

fruit (typically without attached tepals)

Description (diagnostics are in brown)

Disseminule a fruit with or without the persistent inner pair of tepals (tepals are very fragile and therefore often missing). Inner tepals hairy without prominent cilia.

Fruit an achene, broadly elliptic to ovate in outline with a pointed apex often tipped with stylar remnant and a rounded base sometimes subtended with a stem remnant, compressed, cross-section lenticular to barely fusiform, 0.9–1.2(1.4) mm long x 0.7–0.9 mm wide x 0.3–0.4 mm thick. Surface rough (honeycombed and sometimes papillate), grayish or light brown to yellowish-tan, dull.

Similar Species

Urtica urens

Risk Assessment (codes in yellow or red indicate cause for concern; assessments are current as of mid-2011; click AUQP, NZBORIC, or NZBPI for access to the most recent versions of these databases and possible assessment changes)