36 SAXIFRAGACEvE. 



P. millegrana, Englm. Next to P. glandulosa. Tall, flaccid, soft-hairy: leaves 

 3-foliolafce: minute flowers, numerous, yellow: stamens usually 10. Lower San Joaquin. 



P. biennis, Greene. Biennial: stems erect, purple: leaflets 3, fan-shaped, irregularly 

 incised: cymes of small yellow flowers dense: stamens about 10. 



P. frondosa, Greene. 3 feet high, vtscidly hairy and heavy-scented: leaflets 5-9, 

 doubly incised, thin: bractlets long as calyx lobes or longer, trifid: flowers white. 

 Martinez. Frank Swett. 



P. Californica, Greene. Like the last, but leaves mostly radical: glandular, hairy, 

 fragrant: leaflets 11-21, broadly wedge-form, and incised at apex: bractlets usually 3- 

 toothed, exceeding the calyx-lobes: flowers white. 



P. Parryi, Greene: slender stems, 6-10 inches high: leaflets many, cleft scarcely to 

 the middle: calyx rotate, lobes longer than the narrow bracts: petals 3 lines long, white. 

 lone. 



P. laciflora, Drew. Leaflets divided into 2 or 3 segments, bractlets narrow and 

 much shorter than the calyx-lobes: flowers white: filaments petaioid-dilated: achenes 

 only 2 or 3. Hy-am-pum, Trinity River. 



P. Michneri, Greene. (Horkelia.) Leaflets about 15 pairs: all 10 stamens, with 

 oblong-petaloid white filaments. Mt. Tamalpais. 



P. Kelloggii, in Bay-Reg. Bot. , is Horkelia Californica, var. sericia; P. tenui- 

 loba is H. tenuiloba. 



Roses are sensitive to the influence of their homes, and prone to variation; hence 

 botanists will never agree as to the number and limitation of species. The dwarf roses 

 of Sonoma County and Mt. Tamalpais (R. Sonomensis, Greene) only a foot or less in 

 height, with numerous small flowers, may be popularly known, at least, as the Sonoma 

 Rose; and the dwarf rose (Rosa spithamia, Wat.), so abundant on the Trinity River 

 and in the northern Sierra Nevada, may be called the Span-high Rose. R. gratissima, 

 Greene, a form of R. Californica, distinguished by the fragrance of its leaves, may be 

 called the Kern River Sweetbriar Rose. 



CALYCANTHACE^E. 



Fragrant shrubs, with opposite, entire, extipulate leaves, and solitary, terminal, 

 large dull-red or purplish flowers: numerous sepals and petals, all colored alike: stamens 

 many: pistils many. Butneria Occidentalis, Greene, is Calycanthus. See p. 118. 



SAXIFRAGACE^E. 



Herbs, shrubs, or small trees, distinguished from Rosac.ece by albuminous seeds; usually 

 by definite stamens, not more than twice the number of the calyx-lobes; commonly by 



