STANDLEY TREES AND SHRUBS OF MEXICO. 589 



Stems several, fruticulose below, rather densely incurved-puberulous with 

 a few long spreading hairs intermixed, 20 to 35 cm. high ; leaves ovate, 2.8 

 to 4.5 cm. long, 1.2 to 2 cm. wide, acuminate, sparsely pubescent ; racemes 5 

 to 7 cm. long; wings suborbicular, 5.5 mm. long, 4.8 mm. wide; aril cloaklike, 

 appressed, 3.5 mm. high, with deep subentire scarious margin. 



39. Polygala uiicrotricha Blake, Contr. Gray Herb. n. ser. 47: 46. 1916. 

 Hidalgo and Oaxaca ; type from ZimapSn, Hidalgo. 



Suffruticulose below, branched, 25 cm. high and more, densely incurved- 

 puberulous; leaves ovate, 2.7 to 3.8. cm. long, 1 to 1.2 cm. wide, acute to 

 acuminate, firm, rather densely puberulous ; racemes 8.5 to 7.5 cm. long ; 

 wings oval, 5.5 mm. long, 4 mm. wide; aril 3 mm. high, cloaklike, the large 

 umbo pilose, the much broader scarious margin lobulate, the dorsal and lateral 

 lobes barely indicated, subappressed. 



40. Polyg'ala chiapensis Blake, Contr. Gray Herb. n. ser. 47: 40. 1916. 

 Chiapas. 



Stems erect, about 24 cm. high, pubescent with short incurved and sometimes 

 a few longer incurved-spreading hairs ; lower leaves oval or obovate, the 

 middle and upper lanceolate, 2 to 4.2 cm. long, 5 to 8 mm. wide, acuminate, 

 sparsely incurved-pubescent, reticulate ; racemes 6 to 10 cm. long ; wings 

 oval, 5.5 mm. long, 3.5 mm. wide ; aril 1.5 mm. high, papery, irregularly lobulate, 

 the horizontal dorsal margin 2.2 mm. long. 



41. Polygala biformipilis Blake, Contr. Gray Herb. n. sei\ 47: 52. 1916. 

 Veracruz ; type from Zacuapan. 



Stems several, suffruticulose below, erect, 35 to 60 cm. high, densely and 

 softly pubescent with short incurved and long straight spreading hairs ; leaves 

 ovate or oblong-ovate, 3 to 5 cm. long, 1 to 2 cm. wide, acuminate, pubescent 

 like the stem ; racemes dense, 3.5 to 7 cm. long ; flowers purplish ; wings 

 oblong-oval, 8.7 mm. long, 4.7 mm. wide; aril 2.5 mm. high, the small umbo 

 densely pilose, the broad scarious margin lobulate, the dorsal margin ascending, 

 the anterior vertical. 



42. Polygala glandulosa H. B. K. Nov. Gen. Sp. 5: 404. 1821. 



Viola punctata Humb. & Bonpl. ; Roem. & Schult. Syst. Veg. 5: 391. 1819. 

 Not Polygala punctata A. W. Benn. 1879. 



Polygala greggii S. Wats. Proc. Amer. Acad. 17: 325. 1882. 



Nuevo Le6n and San Luis Potosf ; type from Puente de la Madre de Dios. 



Stems very numerous, suffruticulose, diffuse, 10 to 20 cm. long, densely leafy ; 

 leaves obovate to suborbicular-oval, 4.5 to 10 mm. long, 1.5 to 6 mm. wide, 

 rounded, mucronate, cuneate at base, thick, incurved-puberulous or short- 

 pilosulous, densely translucent-glandular-dotted ; racemes axillary, 1 or 2- 

 flowered ; flowers purple ; wings spatulate-obovate, 7.5 mm. long ; capsule 

 elliptic ; aril galeiform, equitant. 



43. Polygala phoenicistes Blake, Contr. Gray Herb. n. ser. 47: 55. 1916. 

 Known only from the type locality, Sierra de Guascama, Minas de San Rafael, 



San Luis Potosi. 



Stems several, fruticulose, diffuse or suberect, 6 to 15 cm. long; leaves 

 cuneate-obovate, 5.5 to 7 mm. long, 2.5 to 4.5 mm. wide, densely glandular- 

 punctate, very sparsely incurved-puberulous along costa beneath ; racemes 

 1-flowered ; flowers purple ; wings spatulate-obovate, 6 mm. long ; capsule 

 oblong-elliptic; aril corneous, 3-lobed. 



44. Polygala macradenia A. Gray, PI. Wright. 1: 39. 1852. 



Coahuila. Texas to Arizona ; type from hills at the head of the San Felipe, 

 Texas. 



