Parr 4, 1908] ROSACEAE 307 
17. Potentilla leurocarpa Rydberg, sp. nov. 
Annual or biennial ; stem about 6 dm. high, often tinged or spotted with red or purple, 
softly hirsute throughout ; leaves ternate; petioles of the basal and lower cauline leaves 3-6 
cm. long, hirsute; leaflets broadly obovate or rounded, 1.5-4 cm. long, sparingly pubescent, 
coarsely toothed with ovate, obtuse teeth; upper stem-leaves short-petioled and with nar- 
rower leaflets ; stipules ovate to lanceolate, toothed or entire, acuminate; inflorescence cy- 
mose and rather dense; hypanthium softly hirsute, flattish, 6-7 mm. broad in fruit; bract- 
lets oval, obtuse, 5-7 mm. long, about equaling the ovate sepals; petals light-yellow, 
broadly obcordate with a narrow notch at the apex, nearly equaling the sepals; stamens 
15-20; pistils numerous; styles short, fusiform; achenes light-colored and smooth. 
Type collected on bottom-land near Bingen, Washington, in 1891, W. N. Suksdorf 2011 (herb. 
N. Y. Bot. Gard.). 
18. Potentilla monspeliensis L. Sp. Pl. 499. 1753. 
Potentilla norvegica I,. Sp. Pl. 499. 1753. 
Fragaria monspeliensis Crantz, Inst.2: 179. 1766. 
Fragaria norvegica Crantz, Inst. 2: 179. 1766. 
Fragaria parvifiora Lam. Fl. Fr. 3: 113, 1778. 
Potentilla hirsuta Michx. F1. Bor. Am. 1: 303. 1803. 
Potentilla Morisoni DC. Cat. Pl. Hort. Monsp. 135. 1813. 
Potentilla grossa Dougl.; Hook. Fl. Bor. Am. 1: 193, as synonym. 1832. | 
Potentilla millegrana Douglas ; Hook. Fl. Bor. Am. 1: 193, as synonym. 1832. 
?Potentilla dichotoma Raf. Aut. Bot. 163. 1840. 
Potentilla norvegica hirsuta T. & G. Fl. N. Am. 1: 436. 1840. 
Potentilla monspeliensis norvegica Rydb. Mem. Dep. Bot. Columbia Univ. 2: 46. 1898. 
Tridophyllum monspeliense Greene, Leaflets 1: 189. 1905. 
Tridophyllum norvegicum Greene, Leaflets 1: 189, 1905. 
Stems stout and very leafy, 3-8 dm. high, ascending or erect, often tinged with red or 
brown, often several from the annual or biennial root, branched above, hirsute with long and 
spreading hairs; stipules broadly ovate, 1-4 cm. long, usually toothed; lower leaves with 
hirsute petioles 3-10 cm. long, the uppermost subsessile, more or less hirsute, all digitately 
3-foliolate or, in luxuriant forms, the lower sometimes digitately or pinnately 5-foliolate ; 
leaflets in the American form usually obovate, 3-10 cm. long, serrate with usually broad. 
teeth, in the European (P. xorvegica) more oblong and with longer teeth; cyme usually 
dense and leafy; flowers on short pedicels, about 1 cm. in diameter ; hypanthium hirsute, in 
fruit about 7-8 mm. in diameter, and with the sepals of about the same length; bractlets 
and sepals oblong-lanceolate, acute, nearly of the same length; petals light-yellow, obot#te, 
or cuneate, truncate or with a shallow, broad emargination, nearly equaling the sepals; s 
mens generally 20, sometimes only 15; anthers cordate, didymous; pistils numerous; style: 
terminal, fusiform and glandular below; achenes usually rugulose when ripe. 
TYPE LocaLity: [Botanical Garden,] Montpellier, France. ae . 
DISTRIBUTION: Rich soil and waste places, from Labrador to the District of Columbia, Kansas, 
Mexico, California, and Alaska; also in Europe and Asia. . 
ILLUSTRATIONS: Nestler, Monog. Potent. £2. 9, f. 1; Britt. & Brown, Ill. Fl. f 1922; Mem. 
Dep. Bot. Columbia Univ. 2: p2. 9; Dietr. Fl. Bor. 12: p/. 797 ; Fl. Dan. pi. 171; Sturm, Deuts. 
Fl. 92: pl. 2. 
19. Potentilla pentandra Engelm.; T. & G. Fl. N. Am. 
1: 447. 1840. 
Potentilla rivalis pentandra $, Wats. Proc. Am. Acad. 8: 553. 1873. 
Potentillopsis Engelmanniana Opiz, Lotos 7: 30, 1857. 
Tridophylium pentandrum Greene, Leaflets 1: 189. 1905. 
Annual; stems stout, very leafy, 3-7 dm. high, erect, often tinged with brown, finely 
hirsute and much branched above; stipules broadly ovate-acuminate, 1-2 cm. long, deeply 
toothed; lower leaves pedately 5-foliolate, or 3-foliolate with the lateral leaflets 2-cleft, 
with hirsute petioles 3-8 cm. long; the uppermost 3-foliolate and very short-petioled ; leaf- 
lets 2-10 cm. long, oblong to oblanceolate or cuneate, deeply serrate, pubescent. on both 
sides; cyme very dense and leafy, in age, as a rule, flat-topped ; flowers on short hirsute 
pedicels, less than 5 mm. in diameter; hypanthium sparingly hirsute and finely pubescent, 
in age about 5 mm. in diameter; bractlets oblong, acute, about 3 mm. long, nearly as long 
as the ovate acute sepals but much narrower; petals pale-yellow, obovate, scarcely half as. 
