Part 5, 1924] POLYGALACEAE 335 



slightly pilose, dotted with whitish glands; seed oblong, appressed-hairy; aril galeiform, equi- 

 tant, with very short lobes, about one-fourth as long as seed. 



Type locality: Puente de la Madre de Dios, Hidalgo. 

 Distribution: Nuevo Leon to Hidalgo. 



Illustrations: H.B.K. Nov. Gen. & Sp. pi. 510: Mem. Soc. Phys. Geneve 31 (2) 2 : pi. 14. 

 f. 37-39. 



73. Polygala phoenicistes Blake, Contr. Gray 

 Herb. 47: 55. 1916. 



Stems several, fruticulose, subereet or diffuse, light-green, incurved-puberulous and glan- 

 dular-punctate, 6-15 cm. long; leaves cuneate-obovate, 5.5-7 mm. long, 2.5-4.5 mm. wide, 

 rounded at apex and mucronulate, cuneate at base, densely glandular-punctate, beneath along 

 costa very sparsely incurved-puberulous, otherwise glabrous; racemes very short, 1 -flowered; 

 flowers purple; sepals lanceolate, acuminate, sparsely ciliolate, otherwise glabrous, glandular- 

 punctate, 2.5 mm. long, the upper one persistent; wings spatulate-obovate, obtuse, 6 mm. long, 

 2.5 mm. wide, long-cuneate at base, sparsely incurved-puberulous and ciliolate; keel 6 mm. 

 long; capsule oblong-elliptic, rounded at base, 5 mm. long, 3 mm. wide, ciliolate, sparsely 

 incurved-puberulous at base, on a stipe 2 mm. long; immature seed spreading-pilosulous, 4 mm. 

 long; aril corneous, 3-lobed, 1-1.2 mm. high, the umbo large, sparsely pilose, the thinner lobes 

 subequal. 



Type locality': Sierra de Guascama. Minas de San Rafael, San Luis Potosi. 

 Distribution: Known only from the type locality. 

 Illustration: Contr. Gray Herb. 47: pi. Z,f. 41. 



74. Polygala macradenia A. Gray, PI. 

 Wright. 1: 39. 1852. 



Polygala macradenia genuina Blake, Contr. Gray Herb. 47: 56. 1916. 



Stems very numerous, 3.5-21 cm. long, crowded, erectish or ascending, fruticulose below, 

 from a thick woody root, flexuous, densely leafy, densely and canescently incurved- or incurved- 

 spreading-puberulous ; leaves linear-oblong or oblong-lanceolate, 2-6.3 mm. long, 0.6-1.3 mm. 

 wide, obtuse, rounded at base, flattened above, thick, densely and canescently puberulous, thickly 

 gland-dotted; racemes 1-2-flowered ; flowers purple; sepals oblong-ovate, obtuse, pilosulous 

 and gland-dotted, 1.7-2.1 mm. long; wings obovate, 5-5.5 mm. long, 2.5 mm. wide, rounded 

 at apex, cuneate at base, sparsely spreading-puberulous, ciliolate, purple; keel 4.5 mm. long; 

 capsule oblong to oblong-ovate, canescently incurved-puberulous and gland-dotted, 5-5.5 mm. 

 long; seed silky-pilose, comose at apex, 4 mm. long; aril 1.2-1.6 mm. high, with corneous 

 vaulted sparsely pubescent umbo 0.9-1.1 mm. high, and three short descending scarious-ended 

 subappressed lobes. 



Type locality: Hills at the head of the San Felipe River, Texas. 



Distribution: Texas to Arizona, and southward to Coahuila. 



Illustrations: Mem. Soc. Phys. Geneve 31(2) 2 : pi. 14, f. 33-36; Contr. Gray Herb. 47: pi. 2,f. 

 42. 



Polygala macradenia glanduloso-pilosa (Chod.) Blake, Contr. Gray Herb. 47: 56. 1916. 

 Polygala glanditloso-pilosum Chod. Bot. Jahrb. 52: Beibl. 115: 72. 1914. Stems less pubescent; 

 leaves linear or linear-lanceolate, 1.2-3 mm. long, 0.3-0.5 mm. wide, thick, concave or sulcate above, 

 convex beneath, sparsely incurved-puberulous, not canescent. San Luis Potosi. 



VI. Biloba. Suffrutescent or herbaceous perennials; leaves not conspicuously glandular; 

 sepals free, the upper herbaceous, persistent, the lower petaloid, deciduous; wings petaloid, 

 deciduous; keel without beak or crest; capsule thin-walled; aril glabrous. 



75. Polygala Purpusii Brand. Univ. Calif. Publ. 

 Bot. 4: 88. 1910. 



Fruticulose, several-stemmed, branched, erect, up to 2.5 dm. high, densely pilosulous with 

 incurved-spreading hairs, the younger parts canescent; leaves oval to oblong-oval, rarely 

 orbicular, 9-14 mm. long, 4-11 mm. wide, acute to obtuse or rounded at both ends, incurved- 

 spreading-pubescent; racemes terminal, sessile or short-peduncled, up to 4.5 cm. long, loosely 

 10-13-flowered; flowers purplish, exceeding the pedicels, these equaling the narrowly lanceolate 



