Vol. ij Hall. — Botanical Survey of San Jacinto Mountain. 119 



very summit of the mountain, where it grows sparingly in the 

 shelter of the large rocks. It prefers, however, the shade of the 

 denser pine and fir forests, and is usually found spreading its 

 rosette of leaves over a dense carpet of pine or fir needles. 

 (Nos. 792, 2593.) 



Pentstemon Bridgesii (Jrau. 



Occasional from the chaparral belt to an altitude of 8000 ft. 

 (Nos. 2288, 2302, 2333.) 



Pentstemon centranthifolius Bentli. Scarlet Bugler. 



Very common in the lower part of the pine belt, reaching its 

 highest point on the west side at 8500 ft. alt. (No. 2276.) 



Pentstemon labrosus Hooh. Rabbit Ears. 



More abundant and of higher range than P. Bridgesii with 

 which it is often associated and which it resembles. In Straw- 

 berry Valley the first blossoms appear late in June and by the 

 middle of July the open forests are aflame with its flowers. It is 

 found on all sides of the mountain and up to 9100 ft. alt., but 

 scarcely enters the Canadian Zone. (Nos. 9G9, 2506.) 



Pentstemon Palmeri Gray. 



Small patches of this species were seen here and there but it is 

 by no means common. It is confined to the Transition Zone. 

 (Nos. 737, 2271, 2548.) 



Pentstemon Parishii Gray. 



Along the lower edge of the pine belt on Fullers Ridge, also 

 in the canon of the San Jacinto River. (No. 2267.) 



As compared with P. spectahilis the flowers of this species are 

 more slender and less contracted at the tube, the lobes are of the 

 same shape but smaller and the corolla is glabrous ; the filaments 

 are also glabrous, while in P. spectahilis the sterile filament is 

 often, and the others sometimes, more or less pubescent, although 

 not so described. In the color of the corolla it is intermediate 

 between that species and P. centranthifolius, being scarlet with 

 tints of blue on most of the flowers. In the leaf also it is intermed- 

 iate between these, having the shape of P. centranthifolius but with 

 the irregularly toothed margin of P. spectahilis. Since both of 

 these species are common in the region the possibility of a hybrid 

 origin for P. Parishii suggests itself. 



