380 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



KEY TO THE GENERA. 



Stamens 10; carpel tails naked on the inner side 1. Geranium (p. 380). 



Stamens 5; carpel tails hairy on the inner side 2. Erodium (p. 381). 



1. GERANIUM L. Cranesbill. 



Herbaceous perennials or annuals, with often glandular branching stems 10 to 60 

 cm. long; leaves long-petioled, palmately lobed or dissected, pentagonal to rotund 

 in outline; petals alternating with 5 glands; stamens mostly 10, of two lengths, alter- 

 nating; capsule 5-lobed, with a long beak; carpels breaking from the column and 

 curling upward, remaining attached at the tip for a time. 



KEY TO THE SPECIES. 



Annual 1- G. langloisii. 



Perennials. 



Flowers white or pale pinkish. 



Petals 10 mm. long or less; leaf segments obtuse; 



plants densely glandular 2. G. lentum. 



Petals 12 to 20 mm. long; leaf segments acute; plants 



glandular only on the pedicels 3 . G. richardsonii. 



Flowers purple or rose purple. 



Petals narrowly obovate or oblong, dark purple. 



Plants glandular throughout; tips of t^he sepals 



0.5 to 1 mm. long 4. G.furcatum. 



Plants not glandular; tips of sepals 1.5 to 2 mm. 



long 5. G. atropurpureum. 



Petals obcordate or broadly obovate, light purple. 

 Sepals glandular like the upper part of the stems; 



leaves somewhat canescent; plants stout 6. G. fremontii. 



Sepals not glandular, the plants glandular only 

 on the pedicels, slender; leaves nearly 

 glabrous 7. G. eremophilum. 



1. Geranium, langloisii Greene, Pittonia 3: 171. 1897. 

 Type locality: St. Martinsville, Louisiana. 



Range: Oklahoma and Louisiana to Texas and southern New Mexico. 

 New Mexico: Organ Mountains (Wooton). Dry hillsides, in the upper Sonoran 

 Zone. 



2. Geranium lentum Woot. & Standi. Contr. U. S. Nat. Herb. 16: 142. 1913. 

 Type locality: West Fork of the Gila, New Mexico. Type collected by Wooton, 



August 7, 1900. 



Range: Mountains of western New Mexico. 



New Mexico: Mogollon Mountains; Craters, Valencia County. Transition Zone. 



3. Geranium richardsonii Fisch. & Trautv. Ind. Sem. Hort. Petrop. 4: 37. 1837. 

 Geranium pentagynum Engelm. in Wisliz. Mem. North. Mex. 90. 1848. 

 Geranium gracilentum Greene; Rydb. Colo. Agr. Exp. Sta. Bull. 100: 218. 1906. 

 Type locality: Valleys of the Rocky Mountains. 



Range: California and South Dakota to Colorado and New Mexico. 



New Mexico: Common in all the higher mountains of the State. Damp woods, in 

 the Transition and Canadian zones. 



The type of Geranium pentagynum was collected by Wislizenus on Wolf Creek, in 

 northern New Mexico. 



