344 NORTH AMERICAN FLORA [Volume 25 



4.3-4.8 mm. long, the oblong porrect or decurved papillose beak 1-1.2 mm. long; stamens 7; 

 capsule oval or oblong-ovate, striate, sparsely puberulous or subglabrous, 3.8-4.2 mm. long, 

 2.6 mm. wide; seed densely silky-pilose, 3 mm. long; aril 1.8-2 mm. deep, the 2 linear-oblong 

 subentire lobes appressed. 



Type locality: Sierra Madre, 64 kilometers south of Saltillo, Coahuila. 

 Distribution: Southern New Mexico to Hidalgo. 



101. Polygala Lindheimeri A. Gray, Bost. Jour. Nat. 

 Hist. 7: 150. 1850. 



Polygala Emoryi Blake, Contr. Gray Herb. 47: 72. 1916. 



Stems several from a fruticulose base, erectish to decumbent, densely pilose to pilosulous 

 with wide-spreading or sometimes incurved-spreading hairs, about 1.8 dm. long; lower or all 

 the leaves elliptic to oval, rarely orbicular, mucronate at the obtuse to rounded apex, rounded 

 to cuneate at base, 5-13 mm. long, 3-12 mm. wide, coriaceous, spreading-pilosulous or incurved- 

 spreading-puberulous, reticulate; middle and upper leaves usually oblong or lance-oblong, 

 acute at each end; racemes 2-8-flowered, geniculate, 1-3.5 cm. long; upper sepal ovate, acute, 

 ciliate and pubescent or puberulous, 2.8-3.2 mm. long; lower sepals 2 mm. long; wings oblong- 

 obovate, 4.5-5 mm. long, 2.3 mm. wide, barely retuse at the rounded apex, cuneate at base, 

 pilosulous; keel 4.2-4.8 mm. long, the beak 0.6-1.1 mm. long; capsule oblong, strjate, pilo-. 

 sulous, 4.8 mm. long, 2.4 mm. wide; seed silky-pilose, 3.3 mm. long; aril 1.8 mm. deep, en- 

 tirely corneous, the umbo 0.4 mm. deep, with indistinct appressed dorsal and oblong entire 

 lateral lobes 1.4 mm. long. 



Type locality: Rocky declivities of the upper Guadalupe and Pedernales rivers, Texas. 

 Distribution: Texas, New Mexico, and Nuevo Le6n. 



Illustrations: M6m. Soc. Phys. Geneve 31 (2) 2 : pi. 18, f. 10-12; Contr. Gray Herb. 47: 

 pi. 2, f. 50. 



102. Polygala Tweedyi Britton; Wheelock, Mem. Torrey 

 Club 2: 143. 1891. 



Polygala Lindheimeri parvifolia Wheelock, Mem. Torrey Club 2: 143. 1891. 



Polygala Arizonae Chod. Mem. Soc. Phys. Geneve 31(2) 2 : 108. 1893. 



Polygala Arizonae tenuifolia Chod. M£m. Soc. Phys. Geneve 31 (2) 2 : 109. 1893. 



Polygala texensis B. L. Robinson; A. Gray. Syn. Fl. N. Am. I 1 : 451. 1897. 



Polygala parvifolia Wooton & Standley, Contr. U. S. Nat. Herb. 19: 392, as to synonym. 1915. 



Polygala blepharotropis Blake, Contr. Gray Herb. 47: 73. 1916. 



Polygala lithophila Blake, Contr. Gray Herb. 47: 74. 1916. 



Polygala pycnophylla Brand. Univ. Calif. Publ. Bot. 6: 366. 1917. 



Suffruticulose, several- to many-stemmed, spreading to erect, incurved-puberulous, usu- 

 ally densely leafy, 7-28 cm. long; leaves more or less distinctly dimorphous or sometimes uni- 

 form, linear to lanceolate, elliptic, or ovate-lanceolate, 4-26 mm. long, 1-6 mm. wide, the lowest 

 broader than the others, sometimes orbicular, acute to acuminate or rarely obtusish, coriaceous, 

 more or less reticulate, incurved-puberulous; peduncles 1 cm. long or less, terminal and pseudo- 

 oppositifol; racemes 3-22-flowered, geniculate, 0.4-4.6 cm. long; bracts elliptic, coriaceous, 

 persistent, 1.2 mm. long; pedicels incurved-puberulous, 1-1.5 mm. long; flowers rosy(?) or 

 whitish, the keel partly yellow; upper sepal persistent, elliptic to ovate, ciliolate and puberulous, 

 2-2.8 mm. long; lower sepals 1.8-2.4 mm. long; wings obovate or oblong-obovate, 4-5.3 mm. 

 long, 1.8-2.3 mm. wide, obtuse to rounded, cuneate at base, glabrous or sparsely incurved- 

 puberulous along midline; keel 3.5-5.3 mm. long, sometimes puberulous, the beak 0.5-1.4 mm. 

 long; capsule oval to oblong, striate, puberulous or subglabrous, 4-4.5 mm. long, 2-2.8 mm. 

 wide; seed silky, 2.8-3.5 mm. long; aril corneous, 1.2-2.2 mm. high, with 2 linear or linear- 

 oblong appressed lateral lobes. 



Type locality: Tom Greene County, Texas. 



Distribution: Harmon County, Oklahoma, and western Texas to Arizona, and southward to 

 Sonora, Coahuila, and San Luis Potosi. 



Illustrations: Mem. Soc. Phys. Geneve 31(2)=: pi. IS. f. 13-15; Contr. Gray Herb. 47: pi. 2, 

 f. 47, 48, 51. 



