STANDLEY TREES AND SHRUBS OF MEXICO. 585 



14. Polygala rectipilis Blake, Contr. Gray Herb. n. ser. 47: 27. 1916. 

 Coahuila. Type from Hillsboro, Sierra County, New Mexico. 

 Several-stemmed, fruticulose below, about 20 cm. high, densely spreading- 



pilose with short hairs ; lower leaves oblong or oval, 8 to 14 mm. long, the 

 others linear, 12 to 22 mm. long, 1.7 to 2.5 mm. wide ; racemes 4 to 10 cm. long ; 

 flowers purplish ; wings obovate-oval, 4.5 mm. long ; aril 1 mm. high, the scari- 

 ous, scarcely lobed margin narrower than the umbo. 



15. Polygala rediicta Blake, Contr. Gray Herb. n. ser. 47: 25. 1916. 

 Polygala scopulorum T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 364. 1917. 

 Coahuila to San Luis PotosI ; type from Sau Luis Potosl. 

 Several-stemmed, suffruticulose below, 17 cm. high or less, incurved-puberu- 



lous; lower leaves oval-oblong, 5 to 9 mm. long, the others linear-lanceolate or 

 linear, 5 to 23 mm. long, 0.5 to 2 mm. wide, involute ; racemes very loose, 6 to 



9 cm. long; wings elliptic-obovate, 4.5 to 5 mm. long; aril 1 mm. high, the 

 dorsal lobe spreading, 1.5 mm. long, the lateral lobes short, subentire, slightly 

 deeper than the umbo. 



16. Polyg'ala longa Blake, Contr. Gray Herb. n. ser. 47: 29. 1916. 

 Chihuahua. Texas and Arizona; type from the Pecos River, Texas. 

 Several-stemmed, suffruticulose below, 13 to 45 cm. high, densely incurved- 



griseous-puberulous ; lowest leaves oblong or oval-oblong, 8 to 17 mm. long, the 

 others oblong-lanceolate or oblong-linear, 17 to 36 mm. long, 1.5 to 4 mm. wide, 

 usually acute, griseous-puberulous ; racemes 2 to 10.5 cm. long ; flowers pur- 

 plish ; wings oval or suborbicular, 3.8 to 5.5 mm. long ; aril 1 mm. high, the 

 dorsal margin 1.5 mm. long, the umbo 0.4 mm. high, the broader scaiioiTS margin 

 strongly lobulate, with distinct or subdistinct dorsal and shorter lateral lobes. 



17. Polygala neurocarpa T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 364. 1917. 

 Known only from the type locality, Ixmiquilpan, Hidalgo. 

 Several-stemmed, suffrutescent below, about 30 cm. long, at first sparsely 



spreading-pubescent with short straight hairs, in age glabrate except in the 

 axils ; leaves linear to linear-oblong, 9 to 25 mm. long, 1 to 4 mm. wide, thickish, 

 soon glabrate ; racemes 3.5 to 7.5 cm. long ; peduncles and pedicels glabrous ; 

 wings oval, 5.2 mm. long ; aril 1 to 1.2 mm. high, 1.4 mm. long dorsally, the 

 scarious margin repand or lobulate, descending, slightly wider than the umbo. 



18. Polyg'ala oopliylla Blake, Contr. Gray Herb. n. ser. 47: 33. 1916. 

 Known only from the type locality, Tlacuilotepec, Puebla. 

 Few-stemmed, suffruticulose below, about 20 cm. high, densely incurved- 



spreading-pubescent ; lowest leaves elliptic, 4 mm. long, the others ovate, 11 to 

 22 mm. long, 3.5 to 10 mm. wide, acute or subacute; racemes 4 to 7 cm. long; 

 flowers purplish ; wings orbicular-oval, 6 to 6.5 mm. long ; aril 1.6 mm. high, 



2 mm. long, the broad scarious margin irregularly lobulate. 



19. Polygala brachyanthema Blake, Contr. Gray Herb. n. ser. 47: 33. 1916. 

 Known only from the type locality, Minas de San Rafael, San Luis Potosl. 

 Several-stemmed, fruticulose below, 17 to 33 cm. high, green, incurved- 



pubescent ; lowest leaves obovate, 3 to 7 mm. long, the others oblong-elliptic, 



10 to 15 mm. long, 3 to 4.8 mm. wide, subobtuse, mucronate, sparsely incurved- 

 pubescent ; flowers purplish and greenish ; wings oval, 4.5 to 5 mm. long ; aril 

 1 mm. high, 1.6 mm. long dorsally, the scarious margin irregularly crenulate- 

 lobulate, produced into a short horizontal lobe, deeper than the umbo. 



20. Polygala brandegeana Chod. Bot. Jahrb. Engler 52: Beibl. 115: 72. 1914. 

 Hidalgo and Puebla ; type from El Riego, Tehuacin, Puebla. 

 Many-stemmed, erectish, 7 to 9 cm. high, pubescent ; lower leaves obovate, 



3 mm. long, the others oblong to oval or oblong-linear, 6 to 10 mm. long, 1.5 to 



