132 NORTH AMERICAN FLORA [Volume 24 



corolla rose-purple or violet; blade of the banner subcordate, rounded or truncate at the apex, 



2 mm. long, the claw 3 mm. long; blades of the other petals broadly oblong, 3 mm. long, 



rounded at the apex, truncate at the base, the claws 1 mm. long; pod pubescent. 



Type locality: "Leavenworth, Arkansas, to El Paso, Texas." 

 Distribution: Texas. 



31. Petalostemon tenuifolius A. Gray, Proc. Am. Acad. 11: 73. 

 1876. 



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



A perennial, with a woody base; stem ascending or erect, slender, 1.5-3 dm. high, pale, 

 glabrous, striate, branched; leaves ascending, 3-4 cm. long; stipules subulate-setaceous; 

 leaflets 3-5, linear or narrowly linear-oblanceolate, 8-18 mm. long, involute, blunt, glabrous 

 or nearly so, sparingly glandular; spikes cylindric, in fruit 2-5 cm. long, 8 mm. thick; bracts 

 silky-villous throughout, ovate, abruptly contracted into a subulate tip, slightly exceeding the 

 buds; calyx silky-villous, 4 mm. long; lobes triangular-lanceolate, about as long as the tube; 

 corolla rose-purple; blade of the banner cordate, 3 mm. long and as broad, nearly equaling the 

 claw; blades of the other petals oblanceolate, 3 mm. long; pod pubescent. 



Type locality: Arkansas at the crossing of Red River. 



Distribution: Kansas to Arkansas and Texas. 



Illustrations: Britt. & Brown, 111. Fl. /. 3113; ed. 2. /. 2517; Rothr. Bot. Wheeler's Surv. 

 pi. 2, f. B. 



32. Petalostemon Gattingeri A. Heller, Bull. Torrey Club 

 26: 593. 1899. 



Kuhnistera Gattingeri A. Heller, Bull. Torrey Club 23: 121. 1896. 



A perennial, woody at the base; stem 3-5 dm. high, branched and bushy, decumbent or 

 erect, sparingly pubescent and glandular-punctate; leaves numerous, 3-4 cm. long; stipules 

 subulate; leaflets 5-7, narrowly linear to narrowly oblong, 1-2 cm. long, 1-3 mm. wide, dull 

 and glandular below, light-green above, glabrous or nearly so; spikes short-peduncled, cylin- 

 dric, in fruit 2-6 cm. long; bracts longer than the calyces, oval-lanceolate, long-attenuate, 

 pubescent; calyx pubescent, 4 mm. long; lobes triangular-lanceolate, slightly shorter than the 

 tube; corolla rose-purple; blade of the banner reniform-cordate, 2 mm. long, 3 mm. broad, 

 the claw 3 mm. long; blades of the other petals oblong, 3 mm. long, the claws 1 mm. long; pod 

 obliquely obovate, 3 mm. long, pubescent. 



Type locality: Nashville, Tennessee. 



Distribution: Tennessee and Alabama. 



33. Petalostemon pubescens A. Nelson, Bot. Gaz. 31: 395. 1901. 



A perennial, with a woody root, branched at the base; stems numerous, prostrate- assurgent, 

 or the central one suberect, 1-2 dm. high, white-sublanate; stipules filiform; rachis pubescent 

 like the stem; leaflets 5, nearly glabrous above, sublanate beneath, spatulate-linear, sessile, 

 10-14 mm. long, not glandular-dotted; peduncles 1-5 cm. long; spikes oblong, 2-5 cm. long, 

 less than 1 cm. thick; bracts scarcely equaling the calyces, obovate, abruptly acuminate, the 

 tip purplish but hidden by the long pubescence; calyx 4-5 mm. long; lobes shorter than the 

 tube; corolla light-purple; blade of the banner broadly cordate, 3 mm. long and broad, the 

 claw somewhat longer; pod softly pubescent. 



Type locality: Berwind, Colorado. 



Distribution: Known only from the type locality. 



34. Petalostemon tenuis (Coult.) A. Heller, Bull. Torrey 

 Club 26: 593. 1899. 



Petalostemon violaccus tenuis Coult. Contr. U. S. Nat. Herb. 1: 34. 1890. 



A perennial, with a woody base; stem much branched, glabrous, slender, terete, about 



3 dm. high; leaves numerous, spreading, 2-3 cm. long; stipules subulate-setaceous; leaflets 

 mostly 3, linear, strongly revolute, 5-12 mm. long, acute, glabrous or nearly so, strongly 



