Rose Family 201 



1. H. sericea (Gray) Rydb. Stem rather stout, 3-6 dm. high, 

 silky-pubescent, scarcely glandular; stipules ovate or lanceolate, 

 1-2 cm. long, often toothed ; basal leaves numerous, rather short- 

 petioled ; leaflets 4-7 pairs, rather thick, densely and finely 

 silky-canescent, obovate, 1-2.5 cm. long, rather coarsely some- 

 what crenately toothed, the upper confluent : cauline leaves simi- 

 lar but smaller with 2-5 pairs of leaflets; cyme rather dense; 

 calyx cupulate ; bractlets entire, ovate or ovate-lanceolate ; lobes 

 similar, slightly exceeding the bractlets; petals white, spatulate, 

 5-6 mm. long. (H. Californica sericea Gray.) 



Near Port Ballona, not otherwise known south of Santa Barbara. March- 

 May. 



2. H. platy calyx Rydb. Stem rather stout, 3-10 dm. high, 

 glandular-pubescent, often tinged with red; stipules ovate, 1-2 

 cm. long, often toothed ; basal leaves several, more or less glandu- 

 lar-puberulent; leaflets 5-7 pairs, obovate, crenate, 1-2 cm. long; 

 cauline leaves similar but with fewer leaflets; cyme open and 

 branched ; pedicels often 2.5 cm. long; flowers 15-20 mm. broad; 

 calyx-tube saucer-shaped ; bractlets ovate, slightly exceeded by 

 the ovate-triangular calyx-lobes ; petals oblong or spatulate, 

 exceeding the calyx-lobes by about }. 



Occasional in the dry interior valleys ; Claremont. 



3. H. puberula (Greene) Rydb. Stems mostly several, 3-6 

 dm. high, branched, finely glandular-puberulent, leafy; stipules 

 obovate, often toothed; basal leaves numerous, puberulent or 

 glabrate; leaflets 5-8 pairs, obovate or cuneate-oblong, 1-2.5 cm. 

 long; flowers about 1 cm. broad; calyx-tube cupulate; bractlets 

 broadly lanceolate, exceeded by the ovate-lanceolate calyx-lobes ; 

 petals oblong-spatulate, scarcely exceeding the calyx-lobes. 



Frequent in the foothills, mostly below 3000 feet altitude. March-May. 



8. CEBCOCABPUS H. B. K. MOUNTAIN MAHOGANY. 



Unarmed evergreen shrubs or trees with simple stipu- 

 late leaves and small axillary or terminal solitary or 

 somewhat fascicled apetalous flowers. Calyx salver- 

 shaped, the 5-lobed limb deciduous. Stamens many, in 2 

 or 3 rows on the limb of the calyx. Pistil 1 ; style ter- 

 minal ; ovule solitary, ascending. Fruit a coriaceous 

 terete villous achene, included in the elongated calyx- 



