PLANTS OF THE SAN BEENARDINO MOUNTAINS 221 



GERANIACEAE 



Geranium caespitosxim James, Long's Exped. 2: 3. 



Rare in canons between Bear Valley and Bluff Lake. 

 Geranium pyrenaicum Burm. f. Sp. Geran. 27. 



Vivian Trail, San Gorgonio Mountain, at 7000 ft. alt. Grant, the only 

 Californian collection. 

 Geranium Richardsonii Fisch. & Trautv. Ind. Sem. Hort. Petrop. 4: 37. 



Frequent in open pine forest in the Lower Transition Zone. 



LIXACE.\E 



Linum Leioisii Pursh, Fl. 210. 



Frequent in dry soil in the Transition Zone. 



EUPHORBIACEAE 



Chamaesyce albomarginata Small, Fl. Se. U. S. 13.33. 



Frequent in red clay soils in the Lower Chaparral Zone. 

 Chamaesyce ocellata Millsp. Field Mus. Publ. Bot. 2: 410. 



Rare, Waterman canon at about 2000 ft. alt. 

 Chamaesyce hirtula Millsp. Field Mus. Publ. Bot. 2: 409. 



Occasional in dry soil in the Transition Zone. 

 Tithymalus Palmeri Parish, comb. nov. Euphorbia Palmeri Engelm. in Wats. 

 Bot. Cal. 2: 75. 



Frequent on dry ridges in the Transition Zone. 



CALLITRICACEAE 



Callitriche palustris Linn. Sp. PI. 992. 



Submerged in still pools of strear&s; Talmadge's Mill and Bear Valley. 



ANACARDIACEAE 



Rhus diversiloba T. & G. Fl. 1: 218. 



Frequent in canons in the Chaparral Zone. 

 Rhus ovata Wats. Proc. Am. Acad. 20: 3.58. 



Occasional in canons in the Lower Chaparral Zone. 



ACERACEAE 



Acer bernardinum Abrams, Torreya 17: 219. 



Mill Creek, at the forks of Snow Canon (type station) and near Forest 

 Home. 

 Acer macrophyllum Pursh, Fl. 267. Maple 



Occasional on the banks of streams in the Chaparral Zone. Twenty feet 

 high but not arborescent in habit. 

 Acer Negundo Linn. var. californicum Sarg. Gard. & For. 4: 148. Box Elder 



Locally abundant along Potato and Edgar Canons in the Lower Transition 

 Zone. 



