804 NORTH AMERICAN FLORA [Vorumy 2° 
7. Potentilla heterosepala Fritsch, Bot. Jahrb. 11: 314. 1890. 
Potentilla dichotoma Galeotti; Lehm. Rev. Potent. 204. 1856. Not P. dichotoma Moench. 1794. 
Potentilla heterosepala guaiemalensis Fritsch, Bot. Jahrb. 11: 315. 1890. 
Potentilla heterosepala mexicana Fritsch, Bot. Jahrb. 11: 315. 1890. 
Potentilla Donnell-Smithit Focke, Bot. Gaz. 16: 3. 1891. 
Perennial, with a thick root and cespitosecaudex; stems several, 4-5 dm long, leafy, 
slender, decumbent, strigose and slightly glandular; basal leaves numerous, pinnate ; 
leaflets 3-7, cuneate-obovate or broadly obovate, subincised-crenate, 10-15 cm. long, 7-10: 
mm. wide, pilose on both sides, the terminal slightly stalked ; petioles about 2 cm. long; 
stipules entire, adnate, acuminate ; stem-leaves ternate with shorter petioles; inflorescence 
leafy ; hypanthium hirsute ; bractlets 3-cleft, seldom entire, oblong-elliptic, obtuse; sepals 
triangular, acute or short-acuminate; both in fruit incurved and enclosing the carpels; 
petals cuneate-obovate, emarginate, half longer than the sepals or more; flowers 1 cm. in 
diameter. 
TYPE LOCALITY : Volcan de Agua near Santa Maria, Guatemala. 
DISTRIBUTION: Mountains of Guatemala and southern Mexico. 
III. Supinae. Plants annual, biennial, or short-lived perennial, leafy ; the leaves of the 
many-flowered cyme very little reduced, so that the flowers seem more or less axillary. 
Flowers small. Petals scarcely exceeding the sepals, often only half as long, yellow or 
whitish, cuneate. Stamens often fewer than 20, with short filaments and small didymous 
anthers. Stylesshort, and thickened and glandular below, subterminal; stigmas minute. 
8. Potentilla paradoxa Nutt.; T. & G. Fl. N. Am. 1: 437. 1840. 
Potentilla supina Michx. F1. Bor. Am. 1: 304. 1803. Not P. supina l,. 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. 
ILLUSTRATIONS: Lehm. Rev. Potent. pl. 62, f.3; Britt. & Brown, Il. Fl. f. 1925 «-Mem. Dep. 
Bot. Columbia Univ. 2: 1. 5. . 
9. Potentilla Nicolletii (S. Wats.) Sheldon, Minn. 
Bot. Stud. 1: 16. 1884. 
Potentilla supina Nicolletii S. Wats. Proc. Am. Acad. 8: 553. 1873. 
Tridophylium 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 
