18 NORTH AMERICAN FLORA [Volume 25 



49. Geranium nervosum Rydb. Bull. Torrey Club 28 : 34. 1901. 

 Perennial, the caudex branched. Stems tufted, scape-like, with the first internode 

 elongate, 4-7 dm. long, finely pubescent with short retrorse hairs ; leaf-blades 9-18 cm. 

 broad, or rarely smaller, 3-5-parted, the divisions cleft or lobed, the primary veins prom- 

 inent beneath ; petioles of the basal leaves elongate, pubescent like the stem ; pedicels 

 with gland-tipped villous-hirsute hairs ; sepals awn-tipped, the outer ones 13-15 mm. long, 

 the bodies oblong, densely pubescent and glandular-ciliate ; petals pinkish with magenta 

 veins, 19-24 mm. long ; style-column 25-30 mm. long, stout, glandular-hirsute ; carpel- 

 bodies 6-8 mm. long, minutely glandular-pubescent ; seeds reticulate. 



Type locality : Fish Creek, Teton Forest Reserve, nortlnvestern Wyoming. 

 Distribution : Wyoming to Oregon and Colorado. 



50. Geranium latum Small, sp. nov. 

 Perennial, the caudex usually branched. Stems 1-3 dm. tall, erect, copiously retrorse- 

 hirsute, sparingly branched ; leaf-blades thick, pentagonal in outline, 3-8 cm. wide, 

 hirsute on both sides, but finely so above, 3-5-parted, the divisions broadly cuneate, incised 

 and toothed, the teeth ovate ; pedicels finely but copiously glandular-hirsute ; sepals awn- 

 tipped, the outer ones 9-10 mm. long, the bodies oblong-ovate to oblong-lanceolate, finely 

 pubescent and more or less hirsute, the tips slender ; petals white and dark -veined, 14-17 

 mm. long; style-column 14-16 mm. long, finely hirsute and somewhat glandular; carpel- 

 bodies not seen. 



Type collected on Popocatepetl, Mexico, August 7 and 8, 1901, J. N. Rose & R. Hay 6065. 

 Distribution : Middle Mexico. 



51. Geranium leucanthum Small, sp. nov. 

 Perennial, the caudex commonly branched. Stems ascending or spreading, 2-7 dm. 

 long, ultimately more or less branched, hirsute with white somewhat retrorse hairs; leaf- 

 blades thin, orbicular-pentagonal in outline, more or less hirsute on both sides, mostly 5- 

 parted, the divisions rather cuneate, cleft or incised ; pedicels glandular-hirsute ; sepals 

 awn-tipped, the outer ones 10-12 mm. long, the bodies elliptic-lanceolate to lanceolate, 

 finely, pubescent, usually hoary ; petals white, 16-21 mm. long, somewhat veiny; style- 

 column 20-25 mm. long, glandular-hirsute ; carpel-bodies about 5 mm. long, hirsute ; seeds 

 finely reticulate. 



Tvpe collected at Pineridge, Fresno County, California, June 15-25, 1900, H. M. Hall & 

 H. P. Chandler 224. 



Distribution : Middle and southern California. 



52. Geranium Richardsonii Fisch. & Trautv. Ind. Sem. Hort. 

 Petrop. 4: 37. 1837. 



Geranium albiflorum Hook. Fl. Bor. Am. 1: 116. 1831. Not G. albiflorum Ledeb. 1831. 



Geranium Hookerianum Walp. Rep. 1 : 450. 1842. 



Geranium penlagynum Engelm. in Wisliz. Tour Northern Mex. 90. 1848. 



Geranium gracilentum Greene ; Rydb. Fl. Colo. 218. 1906. 



Perennial, the caudex often slightly branched. Stems solitary or several together, 

 scape-like, erect or ascending, 4-9 dm. long, pubescent with spreading purple gland-tipped 

 hairs or nearly glabrous; leaf-blades thin, mostly pentagonal in outline, 3-5-parted, the 

 divisions incised, toothed or lobed, usually rather sharply so, sparingly pubescent or gla- 

 brous ; pedicels glandular-pubescent ; sepals awn-tipped, the outer ones 8.5-11.5 mm. long, 

 the bodies elliptic or oblong-elliptic, pubescent and often glandular-ciliate ; petals white, 

 12-20 mm. long; style-coluinn 19-23 mm. long, glandular-pubescent; carpel-bodies 4^4.5 

 mm. long, glandular-hirsute, at least near the top ; seeds reticulate. 



Type locality : Valleys of the Rocky Mountains. 

 Distribution : South Dakota to California and Colorado. 

 Illustration: Hook. Fl. Bor. Am.pl. 40; Bot. Mag.pl. 3124. 



53. Geranium deltoideum Rydberg, sp. nov. 

 Perennial, the caudex branched. Stems ascending or spreading, 1-3 dm. long, 

 branched, finely pubescent with retrorse-appressed hairs ; leaf-blades triangular-hastate, 



