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Published In: Species Plantarum 2: 682. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 8/18/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced


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2. Geranium columbinum L. (long-stalked crane’s bill)

Map 1884

Plants annual, usually taprooted. Aerial stems 9–50 cm long, spreading to loosely ascending, sparsely to moderately pubescent with short (0.3–0.6 mm), downward-pointing, appressed, nonglandular hairs. Leaves basal and opposite, the basal ones long-petiolate, those of the stems with progressively shorter petioles. Leaf blades 1.5–5.5 cm long, wider than long to about as long as wide, kidney-shaped to nearly circular in outline, deeply 5- or 7-lobed, the lobes elliptic to more or less obovate, deeply and sharply 3–7-lobed, sometimes with additional lobes and/or teeth along the margin, the surfaces sparsely to densely pubescent with appressed nonglandular hairs. Inflorescences appearing axillary and often also terminal, long-stalked, consisting of pairs of flowers. Individual flower stalks 20–60 mm long, 3.5–10.0 times as long as the sepals, pubescent with downward-pointing, appressed, nonglandular hairs. Sepals 5–8 mm long, becoming enlarged to 11 mm at fruiting, ovate, tapered or narrowed to a conspicuous, short, awnlike extension 1.2–3.0 mm long at the tip, pubescent with appressed, nonglandular hairs. Petals 8–10 mm long, obtriangular, notched at the tip, reddish purple. Stamens 10. Staminodes absent. Mericarps 20–25 mm long at maturity, the seed-containing basal portion 2.2–2.8 mm long, the lateral surfaces smooth, glabrous or sparsely pubescent with short (0.2–0.3 mm), spreading, nonglandular hairs, lacking a dorsal ridge or wing, the stylar beak with spreading to loosely ascending, nonglandular hairs, the slender extension between the columnar portion and the stigmas 3–5 mm long. Seeds 2.2–2.4 mm long, the surface finely pitted. 2n=18. April–July.

Introduced, known thus far from a single specimen from Texas County (native of Europe, sporadically introduced in the U.S. and Canada). Old fields and open disturbed areas.

This species was first discovered growing in Missouri by Bill Summers in 1993. It is fairly easily recognized in the field by its long-stalked inflorescences, which overtop the foliage.



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