Part 4, 1924] POLYGALACEAE 319 



wide, acutish, rarely obtuse, rounded or cuneate at base, short-pilose both sides with spreading 

 hairs; petioles about 2 mm. long; racemes rather loose, 2-6.5 cm. long; sepals ovate-lanceolate, 

 acute, 3 mm. long; wings oblong to oval, 4-5 mm. long, abruptly short-pointed, pilose, soon 

 deciduous; capsule ciliate, orbicular, 8.5-9 mm. long; see,d 4 mm. long; aril with rather broad 

 lobed and lobulate scarious margin. 



Type locality - : Hills of the Rio Grande to Rio Frio, Texas, westward to the San Felipe. 

 Distribution: Texas and New Mexico to Nuevo Leon. 



Illustrations: Mem. Soc Phvs. Geneve 31(2) 2 : pi. 13, f. 26-30; Contr. Gray Herb. 47: 

 pi. 1, f. 6. 



14. Polygala buxifolia H.B.K. Nov. Gen. & Sp. 5: 407. 1823. 



Polygala ovalifolia DC. Prodr. 1 : 33 1 . 1824. 



Suffrutescent below, much branched, the stems ascending, 2.8 dm. long or less, densely 

 pubescent with short straight or curved spreading hairs; leaves elliptic or ovate, 1.3—1.9 cm. 

 long, 7.5-12 mm. wide, obtuse or rounded, rarely acutish, pubescent with spreading or some- 

 times incurved hairs; wings obovate-oval, 5.5 mm. long, rounded* at apex, short-pilose, subper- 

 sistent; keel 4—4.5 mm. long; capsule oval, densely pilosulous, S mm. long; aril with rather 

 broad scarious margin and distinct short barely lobulate lateral and spreading dorsal lobes. 



Type locality: Santa Rosa, Queretaro. 

 Distribution: San Luis Potosi and Queretaro. 

 Illustration: Contr. Gray Herb. 47: pi. l,f. 7. 



15. Polygala myrtilloides Willd. Sp. PI. 3: 889. 1803. 



Fruticulose below, many-stemmed, densely puberulous with subappressed hairs; leaves 

 elliptic to oblong-oval or oval-ovate, 1.5-2 cm. long, 6-12 mm. wide, the uppermost sometimes 

 oblong, retuse, obtuse, or acutish at apex, cuneate to rounded at base, subcoriaceous, reticulate 

 below, rather densely pubescent both sides with short subappressed hairs; racemes loosely 4—8- 

 flowered, 2 cm. long; sepals subpersistent, ovate-lanceolate to linear-lanceolate, acuminate, 

 4 mm. long; wings obovate-oval, 5.5-6.5 mm. long, 2.8-3.5 mm. wide, obtuse or rounded, 

 incurved-puberulous; keel greenish, 4.5 mm. long; capsule oval, incurved-puberulous and 

 ciliolate, 6.5-7 mm. long; seed 4 mm. long; aril broadly scarious-margined, 3-lobed, the lateral 

 lobes oblong, oblique, somewhat dilated at apex, the dorsal short, horizontal. 



Type locality: " South America " [Mexico]. 

 Distribution: San Luis Potosi and Hidalgo. 

 Illustration: Contr. Gray Herb. 47: pi. 1, f. 8. 



16. Polygala Robinsonii Blake, Contr. Gray 

 Herb. 47: 20. 1916. 



Polygala puberula ovalis Rob. & Greenm. Proc. Am. Acad. 29: 382. 1894. Not P. oralis E. Meyer, 

 1843. 



Perennial, scarcely suffrutescent, few-stemmed, 3-7 cm. high, appressed-puberulous; 

 leaves few, elliptic or oval-oblong, 1.3-2.3 cm. long, 8-16 mm. wide, rounded or obtuse, thin, 

 purplish beneath, densely appressed-puberulous; racemes few-flowered; sepals lanceolate, 

 subpetaloid, magenta-tinted; wings oblong, 3.8 mm. long, obtuse, magenta, sparsely incurved- 

 pilosulous; keel yellowish, 3 mm. long; capsule orbicular, incurved-pilosulous, 5 mm. long; 

 aril minute, 0.5 mm. long, with obsolescent scarious margin and large pubescent umbo. 



Type locality: Guadalajara. Jalisco. 

 Distribution: Coahuila and Jalisco. 

 Illustration: Contr. Gray Herb. 47: pi. l,f. 9. 



17. Polygala Xanti A. Gray, Proc. Am. Acad. 5: 153. 1861. 



Suffrutescent below, the branches procumbent or erectish, 1-2 dm. long, densely pubescent 

 with incurved hairs; leaves oval, 6-16 mm. long, 4—14 mm. wide, rounded at base and apex, 

 densely pubescent with short incurved hairs; racemes 1.8-3 cm. long, rather loose; flowers 

 white, tinged with yellow and purple; wings oval or somewhat rhombic-oval, 5.3-5.8 mm. long, 

 3.1-3.5 mm. wide, obtuse or rounded at apex, cuneate at base, venose, pilose with short incurved- 



