Comprehensive Description
provided by North American Flora
Potentilla nicolletii (S. Wats.) Sheldon, Minn
Bot. Stud. 1 : 16. 1884.
Potentilla supina Nicolletii S. Wats. Proc. Am. Acad. 8 : 553. 1873. Tridophyllum Nicolletii Greene, Leaflets 1 : 189. 1905.
Stems spreading, more branched and more hairy than in P. paradoxa, very slender ; stipules broadly ovate, acute, subentire or sinuate, 5-10 mm. long; lower leaves pinnate with few leaflets, the upper trifoliolate and much reduced, sparingly hairy and thin ; leaflets obovate-cuneate with more acutish teeth than in P. paradoxa, 5-25 mm. long, the terminal generally much larger than the lateral ones ; flowers falsely racemose, from the axils of the reduced upper leaves, about 5 mm. in diameter; hypanthium sparingly hirsute, in fruit very short and broad, about 6 mm. in diameter ; bracts and sepals oblong-ovate, 3 mm. long, mucronate, subequal, or the bracts a little smaller ; petals obovate-cuneate, about equaling the sepals ; stamens 10-15 ; pistils numerous ; styles terminal, fusiform ; achenes smooth, with a. thick corky swelling on the inner side.
Type locality : Devil's Lake [North Dakota].
Distribution : North Dakota to Missouri and Kansas.
- bibliographic citation
- Per Axel Rydberg. 1908. ROSACEAE (pars). North American flora. vol 22(4). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Potentilla paradoxa Nutt.; T. & G. Fl. N. Am. 1 : 437. 1840
Potentilla supina Michx. Fl. Bor. Am. 1 : 304. 1803. Not P. supina I,, 1753. Tridophyllum paradoxum Greene, Leaflets 1 : 189. 1905.
Stem spreading or ascending, seldom erect, about 2-5 dm. high, leafy, at first subsimple, later much branched, sparingly hairy, or glabrate below, hirsute above ; stipules broadly ovate, acute, 5-15 mm. long, generally toothed and ciliate ; leaves short-petioled, pinnate, the lower with 4-5 pairs of leaflets, in age nearly glabrous, and of a light-green color; petioles 2-4 cm. long, sparingly hairy ; leaflets obovate-cuneate, deeply crenate or cleft with rounded obtuse teeth, 1-2 cm, long ; flowers about 7 mm. in diameter, in a branched leafy cyme; hypanthium sparingly hirsute, in age 7-9 mm. in diameter; bractlets and sepals oblong-ovate, acute or mucronate, 3-4 mm. long, about equal in length ; petals yellow, obovate-cuneate, truncate or slightly emarginate, about equaling or sometimes exceeding the sepals ; stamens 15-20, with short filaments and anthers, the latter with nearly spherical sacs ; pistils very numerous ; styles terminal, 'fusiform ; achenes with a thick corky swelling on the inner side.
Type locality : Banks of the Ohio.
Distribution : In low ground from New York and Ontario to Washington and New Mexico ; also in Mexico and eastern Asia.
- bibliographic citation
- Per Axel Rydberg. 1908. ROSACEAE (pars). North American flora. vol 22(4). New York Botanical Garden, New York, NY