96 University of California Puhlicafions. [botany 



LOASACE.'K. 



Mentzelia congesta T. d- (}. 



This species of the desert region was foiiud in Onstatt Valley. 

 (No. 2225.) 



Mentzelia dispersa T. lO G. 



Collected only in Strawberry Valley, bnt probably not rare 

 on the lower slopes. (Nos. 657, 2272.) 



Mentzelia gracilenta T. d- G. 



Plentifnl in Strawberry Valley and elsewhere on the south 

 and west sides, bnt not above 6000 ft. alt. (Nos. 647, 1121.) 



DATISCACE.5^]. 



Datisca glomerata fPreslJ B. tO R. Durango Root. 



Below the 6500-foot contour along streams of the south side. 

 (Nos. 834, 2381.) 



ONAGRACE^. 



Boisduvalia densiflora Wats. 



Occasional in meadows etc. of the lower valleys. (No. 2992.) 



Clarkia rhomboidea Dough 



Common in the Lower Transition, flowering in May and 

 June. On specimens growing beneath shrubs on north slopes 

 the leaves are much wider than on those growing in the open 

 forests. (Nos. 651, 2264, 2270.) 



Epilobium adenocaulon (?) perplexans Trelease, Rept. Mo' 



Bot. Gard. ii. 96, t. 25 (1891). 



Common in moist places throughout the Lower Transition. 

 No. 2589 from the Upper Transition of Round Valley is probably 

 this variety but is somewhat pubescent below while the pedicels 

 and capsules are less pubescent than in the typical form. (Nos. 

 2378, 2562, 2640.) 



Epilobium glaberrimum Barhfij; Trelease, 1. c. 104, t. 38. 



This is the most common Epilobium on the mountain and 

 ranges throughout the Lower Transition Zone. (Nos. 2377, 

 2563.) 



