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. 
GERANIACEZ. 
Geranium Ricuarpsonm, 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 Fremonti, Torr. (Pl. 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, 1-14 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. 27 9, from Rocky 
Cafion, Arizona, I had doubtfully assigned here. Mr. Watson assures me, 
that, though usually placed under G. cespitosum, it is really G. Eremontii. 
It has the stamens of cespitosum, and is besides quite smooth. 
GERANIUM C&SPITOSUM, James.—Perennial, 4’-1° 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 Fé. (21.) 
