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Published In: Systema Naturae, Editio Decima 2: 1087. 1759. (Syst. Nat. (ed. 10)) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

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

 

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14. Ranunculus parviflorus L. (stickseed crowfoot, small-flowered crowfoot)

Pl. 520 d, e; Map 2380

Plants annuals. Roots not tuberous. Stems 10–30 cm long, erect to loosely ascending, not rooting at the lower nodes, moderately to densely pubescent with fine, spreading hairs, without bulbils, the base not bulbous. Basal leaves present at flowering, long-petiolate, the blade 1.5–3.2 cm long, 1.0–2.4 cm wide, heart-shaped, kidney-shaped, or semicircular, simple, the base shallowly to deeply cordate or less commonly broadly rounded, the lobes sometimes again 3-lobed, the lobes more or less rounded at the tip, the margins otherwise entire or sharply toothed. Stem leaves progressively and less divided from the stem base to tip, mostly short-petiolate or sessile. Sepals 5, 1.5–2.0 mm long, reflexed from the base (lacking a transverse fold), more or less plane. Petals 1–5 or rarely absent, when present 1.1–1.8 mm long, 0.2–0.7 mm wide, narrowly obovate to narrowly oblong-obovate, shorter than the sepals, yellow. Style present. Head of achenes 3–5 mm long at maturity, more or less globose, the receptacle glabrous. Achenes 1.7–2.0 mm long, the dorsal margin bluntly thickened, the wall thick, the lateral faces covered with hooked hairs, the beak flattened, triangular, strongly curved or hooked. 2n=32. March–June.

Introduced, scattered in the southern half of the state, mostly abundantly along the southern tier of counties (native of Europe, Asia; introduced in the eastern U.S. west to Missouri and Texas, also the western U.S. from Washington to California; Canada, Australia, Pacific Islands). Upland prairies; also pastures, old fields, ditches, lawns, and open, disturbed areas.

 


 

 
 
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