588 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Jalisco to Morelos ; type collected near Ario, Michoacrm. 



Suffruticulose, several-stemmed, about 40 cm. high, rather densely pubescent 

 with short incurved hairs and plentiful long spreading ones ; leaves ovate or 

 oblong-ovate, 2.5 to 5.5 cm. long, 1.5 to 3 cm. wide, acute to acuminate, thin, 

 bright green above, rather densely pubescent on both sides ; racemes 1.5 to 15 cm. 

 long ; flowers purplish ; wings oval, 5 to 6 mm, long, 3 to 4 mm. wide ; capsule 

 suborbicular, pale, reticulate, about 1 cm. long; aril 1.5 to 2 mm. high, with 

 lobulate or slightly lobed ventral margin, the umbo small, the dorsal margin 

 subhorizontal or curved-ascending to nearly vertically descending. 



33. Polygala brachytropis Blake, Contr. Gray Herb. n. ser. 47: 46. 1916. 

 Known only from the type locality, Zimapan, Hidalgo. 



Suffruticulose below, 25 cm. high and more, densely pubescent with short in- 

 curved and long wide-spreading hairs; leaves ovate, 2.5 to 3.8 cm. long, 1.2 to 

 1.4 cm. wide, acute, firm, rather sparsely pubescent ; racemes about 3 cm. 

 long; wings elliptic, 3.8 mm. long, 2.5 mm. wide; seed unknown. 



34. Polygala americana Mill. Gard. Diet. ed. 8. Polygala no. 7. 1768. 

 Veracruz. 



Several-stemmed, erect, fruticulose, 12 cm. high, densely pubescent with 

 incurved-spreading, rather short, equal hairs; leaves ovate to obovate, 1.4 to 

 2.3 cm. long, 8 to 11 mm. wide, acute, firm but rather thin, rather densely pubes- 

 cent on both sides ; flowers pux-plish ; racemes 1.2 to 4 cm. long ; wings oval, 5 

 to 7 mm. long, 3 to 4 mm. wide ; capsule densely spreading-pubescent, reticu- 

 late ; seed unknown. 



35. Polygala pedicellata Blake, Contr. Gray H^-rb. n. ser. 47: 4.5. 1916. 

 Veracruz and Oaxaca ; type from Zacuapan, Veracruz. 



Stems few, fruticulose below, suberect, branched, about 40 cm. high, rather 

 densely incurved-puberulous ; leaves ovate, 2.3 to 3.4 cm. long, 9 to 16 mm. 

 wide, subacuminate, incurved-puboscent : racemes 3.5 to 7 cm. long; flowers 

 purplish; wings oval, 5 to 6.5 mm. long, 3.5 to 4.5 mm. wide; capsule spreading- 

 pubescent ; aril 1.5 to 1.8 mm. high, the umbo large, the subequal scarious 

 margin with obscure lateral lobes and distinct, descending or upcurved dorsal 

 lobe. 



36. Polygala cuspidulata Blake. Contr. Gray Herb. n. ser. 47: 45. 1916. 

 Puebla and Oaxaca ; type from Cerro de Santa Lucfa, near San Luis Tultit- 



lanapa, Puebla. 



Stems few, erect, densely incurved or incurved-spreading-pubescent, 15 to 40 

 cm. high ; leaves ovate, 2 to 3 cm. long, 1.1 to 1.6 cm. wide, cuspidulate, rather 

 densely incurved-pubescent ; racemes 5 to 11 cm. long; flowers purplish; wings 

 oval, 7 to 8.3 mm. long, 5 to 5.5 mm. wide; capsule spreading-pilosulous and 

 ciliolate ; aril 2.2 to 2.5 mm. high, with tiny pilose umbo, the undulate scarious 

 margin sparsely pilose, the dorsal margin horizontal or slightly curved- 

 ascending or descending at an angle of about 45°. 



37. Polygala appressipilis Blake, Ccntr. Gray Herb. n. ser. 47: 41. 1916. 

 Tepic to Puebla and Oaxaca ; type from Cuernavaca, Morelos. 



Stems several, erect, about 35 cm. high, griseous-puberulous ; leaves ovate or 

 oval, 1.5 to 3 cm. long, 8 to 13 mm. wide, acute or obtuse, appressed-puberulous ; 

 wings oval or broadly elliptic, 6.5 to 9 mm. long, 4.5 to 5.8 mm. wide; mature 

 seed unknown. 



38. Polygala brachysepala Blake, Contr. Gray Herb. n. ser. 47: 44. 1916. 

 San Luis Potosf, Guerrero, and Morelos ; type from Las Canoas, San Luis 



Potosl. 



