POTEXTILLA. ROSAOE^E. 179 



HORKELIA. 



P. fruticosa L. Sp. 495. Shrubby, much branched, 1-4 feet high- 

 leaves pinnately 5-7-foliolate ; stipules scarious ; leaflets crowded, oblong- 

 lanceolate, 2-12 lines long, entire, usually whiter beneath and the margin: 

 revolute : flowers on slender pedicels in loose cymes or solitary : bractlets 

 equalling the acute sepals; petals yellow, orbicular, 2-6 lines long, ex- 

 ceeding the calyx ; stamens 30; carpels 20. On high mountains, Wash- 

 ington to California and the Eastern States. 



3. Style filiform, attached to the middle of. the ovary or 

 beloA" the apex: peduncles axillary, 1 -flowered : carpels glab- 

 rous, short stipitate, the stipe and receptacle villous : herbaceous 

 perennials with mostly creeping or decumbent stems and yellow 

 flowers. 



P. anserina L. Sp. 495. Creeping; ascending stem none; stolons 

 slender, rooting and proliferous : leaves pinnate ; stipules multifid ; leaflets 

 9-19, with several minute pairs interposed, oblong sharply pinnatifid-ser<- 

 rate, nearly glabrous above, silvery-canescent beneath :" pedicels scape- 

 like, solitary, as long as the leaves. Borders of lakes and streams, Idaho 

 to the Eastern States and far northward. 



P. Paciflca. P. anserina v ir. grandis Lehm. Spreading by slender 

 jointed runners : ascending stems none: leaves pinnate, 10-30 inches long; 

 stipules scarious; leaflets 11-35, with small ones interposed, oblong, 

 coarsely and sharply serrate, densely white-tomentose and silky beneath, 

 smooth above, 2^-2 inches long ; peduncles scape-like, as long or longer 

 than the leaves; bractlets lanceolate, acute, glabrate, about 3 lines long* 

 equalling the oblong acute silky sepals; petals broadly ovate, 6 lines long, 

 nearly as broad ; style attached in the middle of the ovary : achenes 

 ovoid, \ line long. In salt marshes along the coast, Alaska to California. 



12 HORKELIA Cham. & Schlecht. Linnsea ii 26. 



Perennial herbs with pinnate or pinnately parted leaves, ad- 

 nate stipules and white or rose-color flowers in crowded or sub- 

 capitate cymes. Calyx -tube campanulate, with 5 erect lobes 

 and 5 alternate bractlets. Petals 5, linear or spatulate, more or 

 less unguiculate. Stamens 5 in one series or 10 in two series; 

 filaments shorter than the calyx-lobes, triangular and petaloid or 

 subulate, those alternate with the petals broadest and persistent. 

 Carpels few to many, attached by their middle to the dry coni- 

 cal villous receptacle : style filiform or thickened at base, nearly 

 terminal: stigma obtuse. Achenes reni form-ovate. Seed sus- 

 pended, with a thick and firm brownish testa. Leaflets not 

 crowded ; 3 to many-lobed or -toothed. 



* Style short, thickened at base. 



H. fusca Lindl, Bot. Reg. xxiii, t. 1997. Viscous-pubescent; stem 

 rather slender, 2-3 feet high: radical leaves 12-19-foliolate, leaflets cune- : 

 ate-oblong, pinnatifid and incised; stipules deeply laciniate: flowers, 

 crowded on the branches of the compound many-flowered cyme: bracts ; 

 palmatifid, much shorter than the golmerules . bractlets shorter and. 

 much smaller than the triangular-lanceolate calyx -lobes; petals cuneiform-, 

 obcordate, much longer than the calyx. In the mountains of eastern 

 Oregon to California. 



H. tenella Rydberg Rev. Pot. H. fvsca var. teneUa Watson Bot. Cat.' 

 i, 181. Glandular-pubescent: stems slender, simple, 6-18 inches high": ; 

 radical leaves pinnately 11-19-foliolate ; stipules linear, the free portion 



