ROSE FAMILY. 



281 



Woods of the Coast Ranges, from upper Napa Valley southward. 

 Not reported from the inner North Coast Ranges. Feb.-May. 



2. F. Chilensis Duchesne. Sand Strawberry. Runners 

 rather stout; upper surface of leaves glabrous, the herbage otherwise 

 densely pubescent with long weak hairs (especially the under surface 

 of the leaves) and often, also, with a tine indument; leaves of firm 

 texture, dark green, the leaflets \ to 1 in. long; scapes several-flowered, 

 1 to 4 in. high; flowers 1 in. in diameter, said by Greene to be 

 dioecious; sepals entire; petals roundish, 4 to 6 lines long; receptacle 

 with the achenes embedded in its surface. 



Sandbanks and hills near the sea from San Francisco northward. 

 Mar. -May. 



8. POTENTI LLA L. Five Finger. 

 Perennial herbs (or some species of the High Sierras suffrutescent), 

 with compound leaves and serrate or cleft leaflets. Flowers in ours 

 white or yellow, in terminal cymes. Calyx saucer-shaped, campanu- 

 late, or cup-shaped, cleft into 5 lobes, with as many alternate bractlets 

 at the sinuses. Petals orbicular to linear. Stamens 10 to many, the 

 filaments filiform or variously dilated. Pistils many or numerous, 

 borne upon an elevated receptacle, becoming in fruit small turgid 

 crustaceous achenes; styles lateral or nearly terminal, deciduous. 

 (Diminutive of the Latin potens, powerful, some species used medici- 

 nally.) 



Stamens 10 to many; filaments filiform; petals yellow, obovate, not clawed. 

 Stamens 10 (?) ; leaves palmately 3-foliolate; stems erect or ascending . . . 



2. P. millegrana. 



Stamens 20 to 25 ; leaves pinnate. 



White-silky beneath; creeping herb 1. P. Anserina. 



Green on both faces; stems erect 3. P. glandulosa. 



Stamens 10 in 2 rows, alternately long and short ; filaments dilated through- 

 out or at base only; petals white, obovate or linear, often clawed. 

 Cymes disposed to be lax; bractlets mostly as large as the calyx-lobes. 

 'Herbage glandular-pubescent and green ; bractlets entire of toothed. 

 Calyx short-campanulate; leaflets sharply toothed or sparingly incised; 



stems slender 4. P. multijuga. 



Calyx cup-shaped. 

 Leaflets toothed or incised at apex; stems stout. . . 5. P. Calif ornica. 

 Leaflets incisely once or twice cleft; stems slender. . 6. P. elata. 



Herbage white-silky, glandless; bractlets entire 7. P. Kelloggii. 



Cymes more condensed; bractlets smaller than the calyx-lobes; stems 

 sparingly leafy, the leaves mostly in a radical tuft. 

 Lobes of the leaflets obtuse; petals notched at apex. . . 8. P. tcnuiloba. 

 Teeth or short lobes of the leaflets acute; petals entire . 9. P. Bolanderi. 



1. P. Anserina L. Goose-grass. Root perennial, thick, bearing 

 a tuft of leaves, stems and peduncles; stems slender, prostrate, rooting 

 at each joint; flowers one to several, long-peduncled; leaves white- 

 silky beneath, green above; leaflets 7 to 21, with smaller ones inter- 

 posed, oblong, sharply serrate; bractlets about equaling the calyx- 

 lobes; petals rounded, much exceeding the calyx; stamens 20 to 25; 

 receptacle hairy. 



Marshy or springy places along the seacoast (San Francisco. Marin 

 Co. and elsewhere). Sierra Nevada. Apr.-Attg. 



