Geranium robertianum L.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Geraniaceae

• Scientific Name

  Geranium robertianum L.

• Description

  Species Description - Weak annual or biennial with branched, spreading, villous or villosulous stems to 6 dm; lvs 3–5-cleft to the base, at least the terminal segment evidently petiolulate, all segments pinnately lobed or cleft; peduncles from most of the upper nodes, mostly 2-fld; sep 7–9 mm, shortly aristate, erect at anthesis; pet 9–13 mm, bright pink or red-purple, entire, long- clawed; carpel-bodies (unlike our other spp.), disarticulating from the beak but tending to remain attached for some time to the stylar column by a pair of elongate, subapical filaments, the proper beak separating from the stylar column ± as in other spp.; 2n=32, 64. Damp rich woods; widespread in the Old World (esp. Eurasia) and widely naturalized in our range. May–Sept. (Robertiella r.)

• Common Names

  herb-Robert