ROSACES. 35 



Ij. puberulus, White. Low, or sometimes 8-15 feet high and shrubby at the base, 

 soft, hairy, or nearly glabrous, the stems angled; leaflets 5-7 pairs, ovate-oblong to 

 linear, cuspidate: flowers purplish. 



VICIA. 



V. Hassei, Watson. Like V. exigua, but leaflets deeply notched: pods 5-8 seeded. 



CEBCIS and PICKEBINGIA. 



Siliquastrum, in Bay-Reg. Bot., is Cercis, and Xylothermia is Pickeringia. 



AMORPHA. 



A. hispidula, Greene, differs from A. Calif ornica in more numerous leaflets (17- 

 25) which are retuse or emarginate. This, according to Greene, is the species from 

 Monterey northward. 



ROSACES. 



Herbs, shrubs or trees, with alternate leaves, usually evident stipules, mostly numer- 

 ous stamens borne on the calyx; distinct free pistils from one to many, or in one sub- 

 order few and coherent with each other and adherent to the calyx forming a 2-several 

 celled inferior ovary. 



Nearly all the cultivated fruits of the temperate zones belong to this order. Key to 

 genera and species, p. 113. 



In Bay Reg. Bot. all but two of the genus Prunus are put under Cerasus, with the 

 same specific names. Osmaronia, Greene, is Nuttallia, Gray; Opulaster capita- 

 tus, Greene, is Physocarpus opulifolia, Max. Malus in Greene's book is Pirus in 

 this. Cercocarpus betulaefolius is C. parvifolius. Rubus parviflorus is R. 

 Nutkanus; R. vitifolius is R. ursinus. 



HOLODISCUS. 



There are probably two species, as given in the Bay- Reg. Bot. : 



H. discolor, Max. Shrub, 2-6 feet high, branches ridged: leaves ovate, narrowed 

 to a short petiole: panicles erect. 



H. ariaefolius, Greene. Shrub, 8-18 feet high, with spreading or recurved branches 

 bearing drooping panicles 6-10 inches long; leaves pinnately shallow-lobed from base to 

 apex. 



POTENTILLA. 



In Flora Franciscana and Bay-Reg. Bot., Prof. Greene has, with apparently good 

 reason, united the genera Horkelia, Ivesia, Sibaldia and Potentilla under the 

 latter name. 



