ROSACEZ. 375 
| 16. GEUM. 
Geum, Linn. Gen, Plant. n. 686; Benth. et Hook. Gen. Plant. i. p. 619. 
About thirty herbaceous species, widely diffused in both north and south temperate 
and cold regions; only one, however, indigenous in South Africa. 
1. Geum virginianum, Linn. Sp. Pl. p. 716. 
Eastern and Sovrnern States of North America.—Mexico, valley of Mexico 
(Schaffner, 134), Tizapan (Bourgeau, 51), Zacualtipan (Berlandier, 361). Hb. Kew. 
2. Geum album, Gmel. in Ind. iii. Sem. Hort. Petrop. p. 34, ex Schl. in Linnea, 
Xlli. p. 265. 
Sout Mexico, in woods near Jalapa (Schiede & Deppe), Mineral del Monte (Ehrenberg). 
17. FRAGARIA. 
_ Fragaria, Linn. Gen. Plant. n. 633 ; Benth. et Hook. Gen. Plant. i. p. 620. 
This genus has a wide range in cold and temperate regions of the north, and in the 
mountains of South America and the Isle of Bourbon. The forms are numerous; but 
Bentham and Hooker estimate the number of species at only three or four. All of 
them are herbaceous. Perhaps the form below should be regarded as a variety of the 
widely dispersed /’. vesca, Linn. 
1. Fragaria mexicana, Schl. in Linnea, xiii. p. 265. 
a Fragaria vesca, Linn., ex Benth. Pl. Hartw. p. 309, et Seem. Bot. Voy. ‘ Herald,’ p. 282. 
North Mexico, common in the Sierra Madre (Seemann, 2178); Sourn Mexico, 
Chinantla, Puebla (Liebmann), Zimapan (Coulter, 94), near Jalapa; San Satvapor, la 
Encarnacion, and Atotonilco el Chico (Schiede); Mineral del Monte (Ehrenberg).— 
—Cotompia. Hb. Kew. 
18. POTENTILLA. 
Potentilla, Linn. Gen. Plant. n. 634; Benth. et Hook. Gen. Plant. i. p. 620. 
About 120 herbaceous and shrubby species, mostly natives of the frigid and tem- 
perate regions of the north. A few species occur in the mountains of tropical 
countries ; and two northern species are also rather widely dispersed in the south. 
1. Potentilla candicans, Humb. et Bonpl., ex Nestl. Monog. Pot. p. 34, t. 3. 
fig. 2, et t. 4. fig. 2. | | 
Potentilla lineariloba, Ser. in DC. Prodr. ii. p. 582 ; Calques:des Dess. Fl. Mex. 298. 
Potentilla humboldtiana, Tratt. 
South MExIco. 
Var. a. In elevated shady places near the village of Tianguillo, between Mexico 
and Toluca, 9000 feet (Humboldt & Bonpland). 
