POTENTILLA. ROSA.t!EiE. 179 



HUKKELIA. 



P. frnticosa L. !^p. 495. Shrubby, much branched, 1-4 feet highr 

 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 

 belovy 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 multifld ; leaflets 

 9-19, with several minute pairs interposed, oblong sharply pinnatifld-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. anseriKa vr. 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,, 

 cparsely and sharply serrate, densely whitetomentose and silky beneath, 

 smooth above, J^-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, 1 line long. In salt marshes along the coast, Alaska to California. 



12 HORKELIA Cham. & Schlacht. Linnsea ii 26. 



Perennial herbs with pinnate or pinnately parted leaves, ad- 

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

 capitatp cymes. Calyx-tube campanttlate, 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 

 termin.al : gtigma obtuse. Achenes reniform-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. fns'ca Lindl, Bot. Keg. xxiii, t. 1997. Yiscous-pubescent ; stem 

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

 ate-oblong, pinnatifid and incised ; stipulea deeply lariniate : flowers 

 crowded on the branches of the compound many-fiowered cyme : bracts 

 palmatifid, much shorter than the golmerules bractlets shorter and 

 much smaller than the triangular-lanceolate calyx-lobes; petals cuijeiform- 

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

 Oregon to California. 



H. tenella Rydberg Rev. Pot. H.Jiieca var. tenella Watfon Bot. Cal. 

 i, 181. Glandular-pubescent: stems slender, simple, 6-18 inches hi^lvt 

 raidical leaves pinnately 11-19-foliolate; Stipules linear, the free portteaf 



