Home Flora of Missouri
Home
Name Search
Families
Volumes
Ranunculus acris L. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Species Plantarum 1: 554. 1753. (1 May 1753) (Sp. Pl.) 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

 

Export To PDF Export To Word

2. Ranunculus acris L. (tall buttercup)

Pl. 518 d; Map 2368

Plants perennials. Roots not tuberous. Stems 40–90 cm long, erect or strongly ascending, not rooting at the lower nodes, glabrous or pubescent with spreading and/or appressed hairs, without bulbils, the base not bulbous-thickened. Basal leaves present at flowering, long-petiolate, the blade 1.8–6.0 cm long, 2.7–9.0 cm wide, pentagonal in outline, simple, but deeply 3- or 5-lobed or -parted, the base V-shaped, the margins otherwise irregularly lobed and/or toothed. Stem leaves grading from moderately petiolate toward the base to sessile near the tip, progressively reduced toward the stem tip, the lower leaves with the blade similar to those of the basal ones, the primary divisions wedge-shaped or rhombic, those of the upper leaves deeply 3(5)-lobed with slender, entire or few-toothed segments. Sepals 5, 4–7 mm long, spreading, plane. Petals 5, 8–11 mm long, 7–13 mm wide, broadly obovate, noticeably longer than the sepals, yellow. Style present. Head of achenes 5–7 mm long at maturity, more or less globose, the receptacle glabrous. Achenes 2–3 mm long, the dorsal margin keeled and usually narrowly winged, the wall thick, smooth, glabrous, the beak 0.3–0.7 mm long, flattened-triangular, tapered to a slender or threadlike tip, this 0.1–0.2 mm long, straight or curved. 2n=14. May–August.

Introduced, uncommon, sporadic (native of Europe, Asia, introduced nearly throughout temperate North America). Pastures, railroads, and open, disturbed areas.

Steyermark (1963) noted that this is a problem pasture weed in the northern United States and can poison livestock. Also, milk from cattle that have ingested plants becomes tainted with a bitter flavor.

 
 


 

 
 
© 2024 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110