New and Noteworthy Northwestern Plants.-- -IV 



By C. V. Piper 



> Amelanchier cuneata sp. nov. 



Shrub about 2 meters high with dull grayish bark even on the 

 branchlets ; youngest twigs with a somewhat appressed white 

 pubescence : leaves elliptic to obovate, few-toothed toward the ob- 

 tuse apex, mostly attenuate to the more or less cuneate base, 

 sparsely pubescent on each side when young, pale green, rather 

 thin, 2—3 cm. long ; petioles slender, a little shorter than the 

 blades; stipules setaceous: racemes 10-20-flowered, the pedicels 

 about 1 cm. long : calyx somewhat pubescent, the acute triangular- 

 lanceolate lobes as long as the tube : petals oblanceolate, obtuse, 

 12 mm. long : stamens 20 : fruit not seen. 



In sage-brush land, Ellensburg, Wash., C. V. Piper, no. 2173, 

 collected May 20, 1897. 



Nearest A. alnifolia Nuttall, but easily distinguished by the 

 pale twigs and cuneate leaves. 



J Potentilla gracilipes sp. nov. 



Perennial, tufted : caudex stout, vertical, simple or branched 

 above, 8—10 cm. long, 1 cm. in diameter, more or less covered 

 with old petioles or pitted-scarred where they have fallen off: 

 leaves densely imbricated at base, oblong in outline, pinnate of 9— 

 1 1 leaflets or divisions, equally silvery sericeous on both sides, 4-6 

 cm. long ; leaflets sessile, broadly cuneate, the lowermost entire, 

 the other 3-cleft at apex, the lobes more or less unequal ; petioles 

 flattened, mostly concealed: peduncles few, 1 -flowered, slender, 

 pubescent, erect, 6-8 cm. high, bearing two bracts above, these 

 ovate, sessile, acutish, simple or 3-lobed : flower 2-2.5 cm. in 

 diameter : hypanthium rotate, appressed, pubescent, the calyx- 

 lobes broadly ovate, acutish, 6-7 mm. long, the bractlets elliptic, 

 much smaller : petals orbicular, short-clawed, bright yellow, 1 cm. 

 long, well exceeding the calyx-lobes : stamens 50—60, the fila- 

 ments glabrous, but with some villous pubescence at and near 

 their bases : carpels numerous, densely silvery villous : styles ter- 

 minal, as long as the carpel, more or less divergent : mature akenes 

 not seen. 



Face of north cliffs, Blue Mts., Oregon, at the head of Anth- 

 ony's Creek, altitude about 8000 ft., in July, 1899, W. C. Ciisick, 



392 



