80 BOTANY. 



back than in the preceding species, with which it contrasts by its larger 

 flowers, more hispid stem, and more and narrower leaflets. Camp Grant, 

 Ariz. (442.) 



Larrea Mexicana, Moric. (L. glutinosa, Engelm.) — (321.) Valley of 

 the Gila, Arizona. (Tab. iii, Torrey, in Emory's Report.) This shrub is 

 especially common on the hills bordering the Gila ; also on the sandy wastes 

 adjacent to Tucson and Camp Lowell in Arizona, even imparting its strong 

 odor to the air. 



GERANIACEtE. 



Geranium Richardsonii, Fisch. & Mey. — Very closely allied to G. 

 maculatum, L. ; differing only in being more smooth, styles hairy and less 

 connate, filaments pilose instead of ciliate, and seeds more delicately retic- 

 ulated. (408.) Mount Graham, Arizona, at 9,200 feet altitude. Also a 

 more white-flowered and more pilose form (234) from Willow Spring, Ariz., 

 at 7,195 feet altitude. Nevada and Utah ; Colorado (758). 



Geranium Fremontii, Torr. (PI. Fendl. p. 26). — Much branched, 

 6'-2° high, pubescent or glabrous ; upper stem-leaves 3-5-cleft, truncate at 

 base, lower broadly cordate ; root-leaves 7-cleft ; peduncles 1-2' long ; 

 pedicels in pairs, 1-1^' long; sepals oval, with a short, thick awn ; fruiting 

 pedicels sometimes divaricate, or deflexed ; petals obovate, varying from 

 light to deep purple, 1' in diameter, villose on the veins ; filaments at 

 base pilose-ciliate ; styles united below ; seeds somewhat reticulated. 

 Plant forms branching, luxuriant tufts. Hard to limit by a description, yet 

 usually readily recognized. Sanoita Valley, Arizona. No. 279, from Rocky 

 Canon, Arizona, I had doubtfully assigned here Mr. Watson aseures me, 

 that, though usually placed under G. ccespitosum, it is really G. Eremontii. 

 It has the stamens of ccespitosum, and is besides quite smooth. 



Geranium ccespitosum, James. — Perennial, 4'-l° high; stems branch- 

 ing from the base ; these, with the petioles and pedicels, retrorsely pilose or 

 pubescent ; peduncles several times longer than the 1-2' long pedicels ; 

 flowers about an inch in diameter, deep purple. Readily distinguished from 

 the preceding species by its stamens, which are almost as long as the 

 petals, and during flowering are outwardly recurved. Santa Fe\ (21.) 



