Ranunculus ambigens
| Ranunculus ambigens | ||||||||||||
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Drawing by Ranunculus ambigens , from: NL Britton , A. Brown : An illustrated flora of the northern United States, Canada and the British Possessions . Charles Scribner's Sons, New York 1913 |
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| Scientific name | ||||||||||||
| Ranunculus ambigens | ||||||||||||
| S. Watson |
Ranunculus ambigens is a species of the buttercup family.
description
The stems are erect or ascending, root at the lower nodes and are hairless or slightly hirsute. The roots are not thickened at the base. The leaf blade of the lower stem leaves is 5.9 to 12.2 × 1.1 to 2.4 centimeters and lanceolate. The leaf base is rounded, blunt to pointed, the leaf edge is serrated and the end of the leaf is pointed. The bracts are linear and lanceolate. The prescription is hairless. The 5 sepals are 3 to 5 × 2 to 3 millimeters in size, hairless and spread out or sometimes bent back at the base. The 5 petals are 5 to 8 × 2 to 3 millimeters in size. The nectar scales are hairless. The head of the achenes is 5 to 7 × 4 to 8 millimeters in size and short-ovoid to compressed-spherical. The achenes are 1.8 × 1.2 to 1.4 millimeters in size and hairless. The beak is 0.6 to 1.2 millimeters long, lanceolate and straight.
The species blooms from May to August.
Occurrence
The species occurs in eastern North America. The distribution area of Ranunculus ambigens includes the south of Maine, New Hambshire, New York and Michigan, Massachusetts, Rhode Island, Connecticut, New Jersey, Delaware, Maryland, Washington DC, Pennsylvania, Ohio, Indiana, Illinois, Kentucky, West Virginia, Virginia, Tennessee, and northern North Carolina, Alabama, and Georgia. A disjoint occurrence exists in southeast Louisiana.
The species grows on ditches, streams, lakes and in swamps at altitudes of 0 to 700 meters.
Systematics
Ranunculus ambigens was first described by Sereno Watson in 1878 .
supporting documents
- Alan T. Whittemore: Ranunculus ambigens . In: Flora of North America. Vol. 3 . on-line
Web links
- Distribution map of Ranunculus ambigens in the Flora of North America