Rose Family 203 



the base of the ovary ; ovule 1, ascending. Achene 

 ovate, compressed, enclosed in the persistent calyx. 



1. A. arvense (L.) Scop. Slender simple or much branched 

 from the base, 4-10 cm. high; floriferous and hirsute through- 

 out; leaves 3-parted, the segments 2-3-cleft; calyx-tube much 

 contracted under the 4-parted limb. 



Occasional in shady places or along streams in the foothills. 



11. ROSA L. ROSE. 



Prickly shrubs with odd-pinnate leaves, adnate stipules 

 and large solitary or corymbose flowers. Calyx-tube 

 globose or urceolate ; its limb 5-parted ; bractlets none. 

 Petals 5, rounded, spreading. Stamens many on the 

 silky disk, which lines the calyx-tube. Pistils many, 

 included in the calyx-tube, but free and distinct ; styles 

 subterminal ; ovules solitary pendulous. Achene bony, 

 enclosed in the fleshy enlarged red berry-like calyx-tube. 



1. B. Californica C. & S. Erect, branching, 1-3 m. high; 

 prickles few, stout, usually recurved; foliage of firm texture, 

 more or less glandular and tomentose; stipules entire; leaflets 

 5-7, ovate or oblong ; serratures mostly simple, spreading ; corymb 

 mostly few-flowered; pedicels pubescent and glandular; calyx- 

 lobes foliaceous-tipped ; fruit globose, 8-12 mm. in diameter; 

 persistent lobes erect. 



Frequent throughout our range both in the valleys and mountains. 

 Flowering often nearly the year round 



12. PBUNUS L. CHERRY. 



Trees or shrubs with alternate deciduous or evergreen 

 usually serrate leaves and white or rose-colored flowers 

 in terminal or axillary racemes or corymbs. Calyx 

 campanulate or turbinate, 5-cleft, deciduous. Petals 5, 

 spreading. Stamens 15-25, inserted with the petals. 

 Ovary solitary, free ; style terminal ; ovules 2, pendu- 

 lous. Fruit a more or less fleshy drupe with a bony 

 stone ; seeds 1 or rarely 2. 



