324 NORTH AMERICAN FLORA [VoLuME 22 
giabrate above, silvery-white beneath; petioles appressed-silky, 3-8 cm. long; leaflets 5-7, 
narrowly oblong, entire or 3-5-toothed at the apex, or sometimes with several shallow teeth 
above the middle, 2-4 cm. long, 8-14 mm. wide; stem-leaves ternate; stipules large, ovate, 
entire, 5-15 mm. long; bractlets 3 mm. long, oblong, acutish, shorter than the ovate-acute 
sepals; petals broadly obcordate, twice as long as the sepals, dark-purple, about 8 
amin. long. 
TYPE LOCALITY: Sides of the Volcano Jorullo, Mexico. 
DISTRIBUTION : Mountains of central and southern Mexico. 
ILLUSTRATION: Nestler, Monog. Potent. p/. 4. f. 3. 
78. Potentilla haematochrus Lehm. Delect. Sem. Hort. Hamb. 
1836: 7. 1836. 
Potentilla haematochrous Schlecht. Linnaea 13: 263. eae 
Potentitla haematochroa Lehm. Stirp. Pug. 9: 1 
Potentilla Lozani Rose & Painter, Contr. U. S. Nat. Herb. 10: 95. 1906. 
Perennial, with a thick ligneous root; stem ascending, yellowish, subvelutinous and 
with longer, spreading or reflexed hairs; basal leaves digitately 7-foliolate, petioled, yel- 
lowish, subvelutinous on both sides or less hairy above; petioles 7-10 cm. long, densely 
hirsute ; leaflets obovate-oblanceolate or broadly oblong, crenate along the whole margin, 
and with prominent veins below, 4-7 cm. long; lower stem-leaves quinate, short-petioled, 
the upper ternate and sessile; stipules ovate, entire, 1-1.5 cm. long, acuminate; bractlets 
lanceolate, nearly equaling the ovate acuminate sepals, which are about 5 mm. long; 
petals obcordate, dark-red, longer than the sepals, about 8 mm. long; stamens about 20. 
TYPE LOCALITY: Mountainous localities, Mexico. 
DISTRIBUTION: Central and southern Mexico. 
‘ ge TIONe: FI. Cab. £1. 179; Lehm. Rev. Potent. p/. 39: Contr. U. S. Nat. Herb. 10: 
pl. 26, 
79. Potentilla Ehrenbergiana Schlecht. Linnaea 13: 261. 1839. 
Perennial, with a thick ligneous root and a short candex ; stem decumbent or ascending, 
canescent; basal leaves petioled, pinnate with 24 approximate pairs of leaflets; leaflets 2- 
3 cm. long, 8-10 mm. wide, green and appressed-pilose above, white-tomentose beneath, 
oblong, coarsely incised, almost pectinate with oblong, acute teeth or lobes ; stem-leaves few, 
the lower with 5-7 leaflets, almost digitate, the upper ternate or simple; bractlets and sepals 
lanceolate, white-villous, the former a little smaller; petals obcordate, slightly longer than 
the sepals, about 6 mm. long, purple; stamens about 20. 
TYPE LOCALITY: Huajalote, near Mineral del Monte, Mexico, 
DISTRIBUTION : Hidalgo. 
ILLUSTRATION : Lehm. Rev. Potent. p/, 32. 
80. Potentilla sanguinea Rydberg, sp. nov. 
Perennial, with a thick woody tap-root and a very short caudex; stem 5-6 dm. high, 
light-green, appressed-pubescent, branched above, the branches erect; basal leaves pin- 
nately 7-foliolate with closely approximate leaflets; petioles 1-1.5 dm. long, with more 
spreading pubescence; leaflets 2-5 cm. long, 1-1.5 cm. wide, oblong or oblong-oblanceo- 
late, serrate, light-green, puberulent on hoth sides and slightly silky on the veins beneath; 
‘lower stem-leaves similar, but more inclined to be digitate, and with shorter petioles ; up- 
permost ones ternate or simple; stipules large, lanceolate, 1-2 cm. long; hypanthium silky 
and puberulent ; bractlets linear-lanceolate, about 5mm. long, acute; sepals narrowly lance- 
oldte, acuminate, about 7 mm. long; petals rose-purple, exceeding the sepals, obcordate ; 
stamens about 25. 
é of collected about Walnut Cafion, Arizona, in 1898, D. T. MacDougal (herb. N. Y. Bot. 
‘Gard.). 
XIX. Aureae. Perennial, with ascending short scaly rootstocks. Stem rather simple, 
ascending or erect, few-flowered, usually less than 3 dm. high. Leaves rather thin, 5-7- 
foliolate, usually digitate or more seldom pinnate with approximate leaflets. Pubesence 
silky-strigose or hirsute, not at all tomentose. Petals yellow, obcordate, exceeding the 
sepals. Styles filiform. 
