20 NORTH AMERICAN FLORA [Volume 25 



slightly paler beneath, all, except those of the upper ones, 5-parteil, the divisions cuneate, 

 incised and coarsely toothed, the teeth ovate; pedicels retrorse-strigillose ; sepals awn- 

 tipped, the outer ones 5-6 mm. long, the bodies oblong or nearly su, with appressed hairs 

 on the veins and finely ciliate, the tips less than 1 mm. long; petals white, 11-12 mm. 

 long, prominently notched ; fruit not seen . 



Type collected on the west slope of Mt. Zempoaltepec, Oaxaca, Mexico, Julv 5-13, 1894, 

 E. II". Nelson 552. 



Distribution : Known only from the type locality. 



59. Geranium Lozani Rose, Contr. U. S. Nat. Herb. 10 : 108. 1906. 

 Perennial, the caudex branched. Stems 3-5 dm. long, branched, finely and rather 



sparingly retrorse-pubescent ; leaf-blades orbicular-pentagonal in outline, 3-6 em. wide, 

 sparingly pubescent on both sides, mostly 5-parted, the divisions with narrow divaricate lobes 

 and teeth ; pedicels pubescent with short retrorse pale hairs ; sepals awn -tipped, the outer ones 

 11-13 mm. long, the bodies elliptic to ovate-elliptic, with scattered hairs on the back, the 

 inner ones finely ciliate and usually pubescent on the midrib ; petals white and veined with 

 red, 22-24 mm. long ; style-column 23-26 mm. long, finely hirsute. 



Type locality : Buena Vista Station, Hidalgo, Mexico. 

 Distribution : Hidalgo. 



60. Geranium bellum Rose, Contr. U. S. Nat. Herb. 10 : 108. 1906. 



Perennial, the caudex branched. Stems ascending or decumbent, 1-4 dm. long, 

 branched, hirsute ; leaf-blades pentagonal in outline, 2.5-4 cm. wide, finely hirsute on both 

 sides, 3-5-parted, the divisions 2-pinnatifid, the ultimate lobes narrow, mostly divaricate ; 

 pedicels hirsute ; sepals awn-tipped, the outer ones 10-12 mm. long, the bodies elliptic or 

 elliptic-lanceolate, hirsute ; petals white, 16-19 mm. long ; style-column about 30 mm. 

 long, hirsute ; carpel-bodies 5-6 mm. long. 



Type locality : Sierra de Pachuca, Hidalgo, Mexico. 

 Distribution : Hidalgo. 



61. Geranium potentillaefolium DC. Prodr. 1 : 639. 1824. 



Perennial, the caudex branched. Stems more or less tufted, not scape-like, 3-5 dm. 

 long, retrorsely pubescent, the first internode not longer than the succeeding ones ; leaf- 

 blades pentagonal in outline, 2-5 cm. wide, 3-parted, the divisions again parted into linear 

 lobes which are pubescent with silvery or white hairs beneath, and rather green above; 

 petioles with more spreading hairs than the stem ; pedicels finely hirsute, the hairs scarcely, 

 if at all, glandular; sepals awn-tipped, the outer ones 11-12 mm. long, the bodies lanceo- 

 late, hirsute, ciliate ; petals pink-purple, 15-18 mm. long, notched at the apex ; style- 

 column 20-25 mm. long, pubescent, with short ascending hairs; carpel-bodies 4 mm. long, 

 finely pubescent ; seeds reticulate. 



Ty'pe locality : Mexico. 



Distribution; Middle Mexico. 



Illustration : Moc. & Sesse, Calq. Dess. pi. 148. 



62. Geranium Nelsonii Rose, sp. now 

 Perennial, the caudex branched. Stems tufted, mostly 1-1.5 dm. long, strigillose with 

 erect-appressed hairs, the first internode not greatly elongate ; leaf-blades pentagonal in 

 outline, 1-2 cm. wide, 3-5-parted, the divisions again parted into narrowly linear lobes 

 which are silvery-white with densely crowded appressed hairs beneath, and grayish-pubes- 

 cent above ; petioles strigillose ; pedicels commonly much elongate, strigillose ; sepals 

 awn-tipped, the outer ones 7-9 mm. long, the bodies oblong or nearly so, canescent, 

 slightly ciliate; petals rose-purple, 12-16 mm. long, usually rounded at apex; fruit not 

 seen. 



Type collected on the summit of Mt. Zempoaltepec, Oaxaca, Mexico, July 9, 1894, E. IV. 

 Nelson 622. 



Distribution : Known only from the type locality. 



