Vol. ij Rail. — Botanical Survey of San Jacinto Mountain. 93 



LINAGES. 



Linum Lewisii Pursh. Blue Flax. 



Not rare over the south and west sides, flowering in May. 

 Evidently confined to the Lower Transition Zone. (Nos. 554, 

 1811.) 



EUPHORBIACEJ^]. 



Euphorbia hirtula Engehn. 



Collected in diy, sandy soil; Strawberry Valley. (No. 966.) 



Euphorbia Palmeri Engehn. 



Common throughout the Transition Zone, but less frequent 

 in the upper portion of its range. (Nos. 970, 1116, 2520.) 



Euphorbia serpyllifolia Pers. Rattlesnake Weed. 



Plentiful in the lower part of the pine belt and below. (Nos 

 2183, 2532.) 



ANACARDIACE.i]. 



Rhus trilobata Nutt. Squaw Bush. 



Quite rare in the Upper Sonoran. Collected on Chalk Hill 

 and on Thomas Mt. 



CELASTRACE^. 



Euonymus Parishii Trelease, Trans. St. Louis Acad. v. 354 

 (1899) and Syn. Fl. i pt. 1, 397 (1897). Spindle Tree. 

 Burning Bush. 

 Found only at an altitude of about 6000 ft. in a canon opening 



into Strawberry Valley from the east, this probably being the 



type locality. The shrubs were few in number, 8-10 ft. high, 



and with long, slender branches. (No. 2299.) 



ACER ACE Ji]. 



Acer glabrum Torr. Sierra Maple. 



Only one specimen of this was found and that in a canon of 

 the east side below Round Valley at an estimated altitude of 

 7500-8000 ft. There is probably more of it in the same or 

 neighboring canons below our limits. (No. 2602.) 



