Part 5, 1924] POLYGALACEAE 351 



Type locality: Hacienda de Angostura, San Luis Potosf. 



Distribution: San Luis Potosi. 



Illustrations: Contr. U. S. Nat. Herb. 10: pi. 39; Contr. Gray Herb. 47: pi. 2,f. 54. 



122. Polygala subalata S. Wats. Proc. Am. 

 Acad. 26: 123. 1891. 



Stems several from a slender biennial or perennial root, erect or rarely spreading, 6-17 cm. 

 high; leaves whorled to about middle of stem, the lower in whorls of 5, obovate, 3.5-6 mm. 

 long, 1.5-3 mm. wide, rounded, narrowly denticulate-margined, the middle and upper mostly 

 scattered, lanceolate or lance-obovate or -elliptic, 7.5-14.5 mm. long, 2.5-4 mm. wide, acute 

 to acutish; racemes dense, 5-6 mm. thick, the axis 1-4 cm. long; flowers white with green 

 nerves; sepals lance-ovate, obtuse, 1 mm. long; wings oval, 2.5 mm. long, 1.3 mm. wide, 

 rounded, short-clawed, 3-5-nerved; keel 2.3 mm. .long, the crest of 3 lobes on each side; cap- 

 sule suborbicular-elliptic, 2 mm. long, 1.6 mm. wide; seed 1.6 mm. long, sparsely appressed- 

 pubescent, equaled by the 2 linear-oblong appressed lobes of the aril. 



Type locality : Flor de Maria, Mexico (state) . 



Distribution: Durango to Veracruz and Oaxaca. 



Illustration: Contr. Gray Herb. 47: pi. 2, f. 60. • 



123. Polygala praetervisa Chod. Mem. Soc. Phys. 

 Geneve 31(2) 2 : 140. 1893. 



Polygala Boykinii sparsifolia Wheelock, Mem. Torrev Club 2: 121. 1891. 

 Polygala sparsifolia Small, Fl. SE. U. S. 686. 1903. 

 Polygala sparsifiora Small. Fl. SE. U. S. 1333. 1903. 



Stems several from a slender biennial or perennial root, ascending or spreading, 2.5-4 dm. 

 long; lowest leaves in 3-8 remote whorls of 4, obovate to linear-elliptic, 3.5-9 mm. long, 1-2.5 

 mm. wide, mucronulate, more or less involute, thickish, the middle and upper scattered, linear 

 or elliptic-linear to subulate, 3-1 1 mm. long, 0.3-1.6 mm. wide, cuspidate, involute, the upper- 

 most very small; racemes cylindric, acuminate, dense or loose, 3-5 mm. thick, the axis 1.5-10 

 cm. long; bracts ovate-subulate, ciliate, deciduous; pedicels 0.2-0.3 mm. long; flowers white 

 and greenish; sepals broadly ovate, acutish, glabrous, 1.1-1.4 mm. long; wings oval, 1.8-2.1 

 mm. long, 1.3-1.5 mm. wide, broadly rounded, short-cuneate at base, 3-nerved; keel 1.7-2.1 

 mm. long, the crest on each side of a rounded lamella and 3 lobes; capsule oblong, 2-2.2 mm. 

 long, 1.2-1.3 mm. wide; seed cylindric-ellipsoid, pilosulous, 1.7 mm. long; aril 0.8-1 mm. 

 long, the 2 linear-elliptic lobes appressed. 



Type locality; Coral soil, Cudjoe Key, Florida. 



Distribution: Florida Keys. 



Illustration: Mem. Soc. Phys. Geneve 31(2) ! : pi. 20, f. 19. 



124. Polygala alba Nutt. Gen. 2: 87. 1818. 



Polygala Senega tenuifolia Pursh, Fl. Am. Sept. 750. 1814. 



Polygala bicolor H.B.K. Nov. Gen. & Sp. 5: 394. 1823. 



Polygala Torreyi G. Don, Gen. Hist. 1: 360. 1831. 



Polygala Bcyrichii T. 8c G. Fl. N. Am. 1 : 130. 1838. 



lAsemeia alba Raf. New Fl. 4: 88. 1838. 



tAsemeia leplopsis Raf. New Fl. 4: 88, as synonym. 1838. 



Polygala alba bicolor Chod. Mem. Soc. Phys. Geneve 31 (2) 2 : 136. 1893. 



Polygala alba brachystachya Chod. Mem- Soc. Phys. Geneve 31 (2) 2 : 136. 1893. 



Polygala alba leploslachya Chod. Mem. Soc. Phys. Geneve 31(2) ! : 137. 1893. 



Polygala alba mexicana Chod. Mem. Soc. Phys. Geneve 31(2)*: 137. 1893. 



Polygala alba tenuifolia Blake, Contr. Gray Herb. 47: 86. 1916. 



Stems numerous from a perennial root, often with a cluster of short leafy branches at base, 

 erect or ascending, simple or sparsely branched, 2-3.5 dm. high; leaves scattered, except for 

 1 or 2 whorls at base, the lowest spatulate-obovate, 4-12 mm. long, 1.5-2.5 mm. wide, the others 

 linear, acuminate, cuspidate, 0.8-2.5 cm. long, 1-1.5 mm. wide; racemes dense, conic-cylin- 

 dric, 5-8 mm. thick, 2-8.5 cm. long; flowers white with green center, the crest often purple; 

 sepals ovate to oblong, obtuse, 1.3-1.5 mm. long; wings elliptic, 2.9 mm. long, 1.6 mm. wide, 

 rounded, at base short-cuneate; keel 3 mm. long, the crest of 4 lobes on each side; capsule 

 elliptic or oblong-elliptic, 2.5-2.9 mm. long, 1.3-1.6 mm. wide; seed pilose, 2.3-2.5 mm. long; 

 aril 0.S-1.5 mm. high, the 2 lobes oblong, appressed. 



