134 NORTH AMERICAN FLORA [Volume 24 



38. Petalostemon decumbens Nutt. Jour. Acad. Phila. 



7: 93. 1834. 



Kuhnistera decumbens Kuntze. Rev. Gen. 192. 1891. 



A perennial; stems solitary or several, decumbent or ascending, glabrous or sparingly 

 pubescent, striate; leaves numerous, 3-5 cm. long, ascending; stipules subulate; leaflets 5-7, 

 linear or linear-oblong, 8-20 mm. long, acute or mucronate, slightly involute on the margins, 

 sparingly pilose, glandular-dotted beneath; spikes ovoid or short-oblong, 1-2 cm. long, fully 

 1 cm. thick in fruit; bracts lanceolate, attenuate, much longer than the calyces and buds; 

 calyx with short silky appressed pubescence, 4 mm. long; lobes lanceolate or ovate-lanceolate, 

 shorter than the tube, acute; corolla pink or rose-purple; blade of the banner oblong-ovate, 

 cordate at the base, 3 mm. long, equaling the claw; blades of the other petals linear-oblong, 

 fully 3 mm. long, the claws less than 1 mm. long; pod broadly and obliquely obovate, strigillose. 



Type locality: Plains of Red River [Arkansas?]. 

 Distribution: Arkansas and Texas. 



39. Petalostemon ornatus Dougl.; Hook. Fl. Bor. Am. 



1: 138. 1830. 



Petalostemon ovatus S. Wats. Am. Nat. 7: 300. (err.) 1873. 



Petalostemon macrostachyusT. & G. Fl. N. Am. 1: 309, in part. 1838. Not P.macroslachvus Torr. 



1827. 

 Dalea omata Eaton & Wright, N. Am. Bot. 219. 1840. 

 Kuhnistera omata Kuntze, Rev. Gen. 192. 1891. 



A perennial, branched at the woody base; stems 3-5 dm. high, glabrous, striate, conspicu- 

 ously punctate; leaves ascending, 4-5 cm. long; stipules subulate; leaflets 5-7, obovate or ellip- 

 tic-oblanceolate, 10-15 mm. long, yellowish-green above, paler and densely glandular-punctate 

 beneath, rounded at the apex; spikes oblong, long-peduncled, in fruit 2-4 cm. long, about 15 

 mm. thick; bracts narrowly lanceolate, long-acuminate, long-pilose, almost plumose above, 

 much exceeding the calyces; calyx 4.5 mm. long, silky-pilose; lobes lanceolate, about equaling 

 the tube; blade of the banner 3.5 mm. long, rounded at the apex, truncate or subcordate at 

 the base, the claw 4 mm. long; blades of the other petals 3.5-4 mm. long, rounded at the apex, 

 acute at the base, the claws fully 1.5 mm. long. 



Type locality: Prairies near the Blue Mountains of Lewis River [Snake River], Oregon or 

 Washington. 



Distribution: Oregon and Washington. 



40. Petalostemon lagopus Rydberg, sp. nov. 



A perennial, branched at the woody base; stems 3-6 dm. high, glabrous, straw-colored, 

 punctate; leaves ascending, 3-5 cm. long; stipules subulate; leaflets mostly 5, obovate or 

 broadly elliptic, 1-2 cm. long, rounded or obtuse at the apex, glabrous, punctate beneath; 

 heads oblong, in fruit 2-4 cm. long, about 1.5 cm. thick; bracts broadly obovate, abruptly 

 acuminate, long-pilose, about equaling the calyces; calyx 5 mm. long, long-pilose; lobes lan- 

 ceolate, somewhat shorter than the tube; corolla rose-colored; blades of the banner broadly 

 oblong or oval, rounded or truncate at the apex, truncate at the base, 4 mm. long, the claw 

 5 mm. long; blades of the other petals oblong, acute at the base, the claws 1.5 mm. long; pod 

 4 mm. long, broadly obliquely obovate, pubescent. 



Type collected at Truckee Pass, Washoe County, Nevada, June 14, 1906, Kennedy 1316 (herb. 

 N. Y. Bot. Gard.). 



Distribution: Idaho, Nevada, and western Utah. 



41. Petalostemon Rothrockii Rydberg, sp. nov. 



Petalostemon lenuifolius Rothr. Bot. Wheeler's Surv. 99, in part. 1878. 



A perennial, with a thick woody base; stems several, 3-5 dm. high, glabrous, striate, con- 

 spicuously punctate; leaves ascending, 3-5 cm. long; stipules subulate-filiform; leaflets oblong 

 or linear-oblong, obtuse or retuse, thick, about 1 cm. long, light-green above, glaucous and 

 strongly punctate beneath; spikes long-peduncled, cylindric or oblong, in fruit 8-9 mm. thick, 

 1-5 cm. long; bracts broadly obovate, short-acuminate, dark, short-pilose or glabrous, about 



