Part 5, 1924] POLYGALACEAE 331 



of whitish lateral veins; racemes 5-7 cm. long; flowers apparently ochroleucous ; sepals ovate, 

 acute, sparsely incurved-puberulous, ciliate, the upper 1.7-2 mm. long, the lower 1-1.5 mm. 

 long; wings suborbicular, 5.3-5.5 mm. long, 4.5-4.8 mm. wide, broadly rounded, at base scarce- 

 ly unguiculate, sparsely ciliolate. sparsely and finely puberulous along costa; keel 4.5-5.7 mm. 

 long; capsule oval, densely incurved-puberulous, 9.5 mm. long; seed silky-pilose, 4.8 mm. 

 long; aril cloak-like, appressed, 3.5 mm. high, with obscurely pilosulous umbo and deep sub- 

 entire scarious margin. 



Type locality: Las Canoas, San Luis Potosf. 

 Distribution: San Luis Potosi, Guerrero, and Morelos. 



60. Polygala microtricha Blake, Contr. Gray 

 Herb. 47: 46. 1916. 



Suffruticulose below, branching, 2.5 dm. high and more, densely incurved-puberulous; 

 leaves ovate, 2.7-3.8 cm. long, 1-1.2 cm. wide, acute to acuminate, mucronulate, firm, rather 

 densely puberulous with short incurved hairs; racemes loose, 3.5-7.5 cm. long) flowers appar- 

 ently ochroleucous; sepals ovate-lanceolate, acute, 3.5-3.8 mm. long; wings oval, 5.5 mm. 

 long, 4 mm. wide, rounded, cuneate at base, along costa and toward apex sparsely incurved- 

 puberulous; lateral petals present, 1 mm. long; keel glabrous, 6 mm. long; capsule oval, in- 

 curved-ciliolate, sparsely pubescent with short incurved hairs especially near the septum, 9 

 mm. long; seed 5 mm. long; aril 3 mm. high, cloak-like, the large umbo pilose, the much 

 broader scarious margin lobulate, the dorsal and lateral lobes barely indicated, subappressed. 



Type locality: Zimapan, Hidalgo. 

 Distribution: Hidalgo and Oaxaca. 

 Illustration: Contr. Gray Herb. 47: pi. l,f. 28. 



61. Polygala Hayesii Blake, Contr. Gray 

 Herb. 47: 48. 1916. 



Stems several, fruticulose below, erect, 1-1.2 dm. high, rather densely pubescent with 

 short incurved and long spreading or ascending straight or straightish hairs; leaves ovate, 

 2.1-3.2 cm. long, 9-11 mm. wide, acuminate, reticulate-venose with about 5 pairs of veins, 

 rather densely pubescent like the stem; lower leaves smaller, oval, obtuse; racemes about 

 15-flowered, 3.5-3.8 cm. long; sepals ovate, acuminate, 2.7 mm. long; wings oval, 5.8 mm. 

 long, 4 mm. wide, rounded, barely cuneate at base, sparsely ciliolate, along costa and toward 

 apex sparsely incurved-puberulous; keel 5.5 mm. long; submature capsule orbicular, ciliolate 

 and incurved-puberulous, 8.5 mm. long; seed pilose; submature aril 1.5 mm. high, the umbo 

 pilose, the much broader scarious margin slightly undulate, sparsely pilose, the dorsal margin 

 descending at an angle of about 45°. 



Type locality: Plains about Guatemala City, Guatemala. 

 Distribution: Known only from the type locality. 

 Illustration: Contr. Gray Herb. 47: pi. l,f. 29. 



62. Polygala chiapensis Blake, Contr. Gray 

 Herb. 47: 40. 1916. 



Stems erect, about 2.4 dm. high, pubescent with short incurved or incurved-spreading and 

 sometimes a few longer incurved-spreading hairs; lowest leaves oval or obovate, reduced, the 

 middle and upper lanceolate, 2-4.2 cm. long, 5-8 mm. wide, acuminate, cuneate at base, 

 sparsely incurved-pubescent, reticulate; racemes 6-10 cm. long; pedicels 4 mm. long; flowers 

 probably purplish; sepals ovate-oblong to ovate, acute, 2-2.3 mm. long; wings oval, 5.5 mm. 

 long, 3.5 mm. wide, broadly rounded, subunguiculate at base, sparsely ciliolate, along costa 

 incurved-pubescent; keel 5-6 mm. long; capsule oval, rather densely incurved-puberulous, 

 10 mm. long; seed silky-pilose; aril papery, 1.5 mm. high, with minute umbo, sparsely pilose, 

 irregularly lobulate, not divided into distinct lobes, the horizontal dorsal margin 2.2 mm. long. 



Type locality: Mountains in the temperate region, Chiapas. 

 Distribution: Known only from the type locality. 

 Illustration: Contr. Gray Herb. 47: pi. 2,f. 36. 



