Part 2, 1920] FABACEAE: PSORALEAE 133 



punctate; spikes usually long-peduneled, subglobose or short-oblong, 1-1.5 cm. long, about 

 1 cm. thick in fruit; bracts ovate-lanceolate, pubescent, much shorter than the calyces; calyx 

 4 mm. long, appressed-silky ; lobes triangular-ovate, shorter than the tube; corolla pink- 

 purple; blade of the banner broadly cordate, 2 mm. long, shorter than the claw; blades of the 

 other petals elliptic, 3 mm. long; pod obliquely obovate, finely pubescent. 



Type locality: Santa Anna, Coleman County, Texas. 

 Distribution: Arkansas and Texas. 



35. Petalostemon Reverchoni S. Wats. Proc. Am. Acad. 

 21:449. 1886. 



Kuhnistera Reverchoni A. Heller, Bull. Torrey Club 23: 124. 1896. 



A perennial, branched at the base; stems diffuse, 1-2 dm. long, finely pubescent; leaves 

 2-3 cm. long; stipules subulate; leaflets 5-11, linear or linear-oblanceolate, glabrous, 5-10 mm. 

 long, acutish, somewhat involute; spikes sessile, subglobose or oblong, in fruit 1-7 cm. long, 

 about 1 cm. thick; bracts shorter than the calyces, deciduous, silky throughout, lanceolate, 

 acuminate; calyx about 4 mm. long, appressed, silky; lobes deltoid, acute or acuminate, about 

 equaling the tube; corolla deep-pink; pods silky, obliquely obovate, 3 mm. long. 



Type locality: Rocky top of Comanche Peak, Texas. 

 Distribution : Texas. 



36. Petalostemon Stanfieldii Small, Fl. SE. U. S. 631, 1332. 1903. 



A perennial, branched at the suffrutescent base; stems 1-3 dm. high, often branched, 

 glabrous, terete, straw-colored; leaves numerous, 2-4 cm. long, ascending; stipules subulate- 

 filiform; leaflets 3-5, linear or linear-filiform, 5-12 mm. long, acute, strongly involute, glabrous, 

 conspicuously punctate; spikes long-peduncled, cylindric, in fruit about 7 mm. thick, 1-4 cm. 

 long; bracts broadly obovate, abruptly acuminate, silky below, with dark glabrous tips; calyx 

 silky-puberulent, with mostly appressed hairs, 3 mm. long; lobes triangular, about half as 

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

 the claw 3 mm. long; blades of the other petals oblong, rounded at the apex, truncate at the 

 base, 3 mm. long, the claws less than 1 mm. long; pod 2 mm. long, pubescent, at least above, 

 obliquely obovate. 



Type locality: San Marcos. Texas. 

 Distribution: Kansas to Texas. 



37. Petalostemon pulcherrimus A. Heller, Bull. Torrey Club 

 26: 593. 1899. 



Petalostemon virgatus Scheele. Linnaea 21: 461. 1848. Not P. virgatus Nees & Schw. 1841. 

 Petalostemon violaceus pubescens A. Gray, PI. Wright. 1: 46, in part. 1852. 

 Kuhnistera pulcherrima A. Heller, Bot. Expl. Texas 50. 1895. 



Petalostemon pubescens A. Heller, Muhlenbergia 1: 28. Au 1901. Not P. pubescens A. Nelson, 

 Je 1901. 



A perennial, with a woody tap-root, branched at the base; stem? simple, erect, striate, 

 glabrous or sparingly pubescent, 3-7 dm. high; leaves 4-6 cm. long, numerous; stipules subu- 

 late-filiform ; leaflets 3-7, linear, 2-4 cm. long, 1-3 mm. wide, acute at each end, often somewhat 

 involute, yellowish-green above, somewhat glaucous, sparingly pubescent or glabrous, glandu- 

 lar-punctate beneath; spikes long-peduncled, oblong, in fruit 2-4 cm. long, 12-15 mm. thick; 

 bracts broadly ovate, short-acuminate, pubescent, with a dark almost glabrous subulate tip; 

 calyx 4 mm. long; tube glaucous, silvery -pubescent on the ribs; lobes acute, silvery-pubescent, 

 much shorter than the tube, the three lower triangular-lanceolate, the upper two triangular- 

 ovate; corolla deep-rose-purple; blade of the banner 2.5 mm. long, cordate, rounded or retuse 

 at the apex, the claw 3 mm. long; blades of the other petals oblong or elliptic, rounded at the 

 apex, 3 mm. long, the claws 1 mm. long; pod broadly obliquely obovoid, slightly pubescent, 

 3 mm. long. 



Type locality: New Braunfels, Texas. 



Distribution: Missouri and Arkansas to Texas and New Mexico. 



Illustration: A. Heller, Bot. Expl. Texas pi. 2. 



