Blake Revision of Polygala 85 



late-margined, very shortly petioled, 3.5-6 mm. long, 1.5-3 mm. 

 wide; middle and upper mostly scattered, lanceolate or lance- 

 obovate or -elliptic, acute or acutish at each end, 7.5-14.5 mm. 

 long, 2.3-4 mm. wide. Racemes dense, many-flowered, l-(at 

 length)4 cm. long, 5-6 mm. wide, on peduncles 0.3-3.4 cm. long. 

 Flowers white with green nerves, 2.5 mm. long. Sepals lance-ovate, 

 obtuse, white-margined, gland-dotted, 1 mm. long. Wings oval, 

 rounded at apex, short-clawed, white with greenish center, 3-sub- 

 5-nerved, gland-dotted, 2.5 mm. long, 1.3 mm. wide. Keel 2.3 

 mm. long; crest of 3 pairs of lobes: posterior pair cuneate, barely 

 3-fid at apex; 2 anterior pairs linear, entire. Upper petals oval, 

 rounded at apex, 2.1 mm. long. Capsule suborbicular-elliptic, 

 slightly oblique, 2 mm. long, 1.6 mm. wide. Seed 1.6 mm. long, 

 sparsely appressed-pubescent, equalled by the linear-oblong ap- 

 pressed lobes of the aril. Wats.! Proc. Am. Acad. xxvi. 132 

 (1891). Durango: City of Durango, 1896, Palmer 908 (G). 

 San Luis Potosi: San Miguelita Mts., Aug. 1877, Schaffner 5 

 (GK); Alvarez, July 1904, Palmer 205 (GK); 1830-2440 m., 1878, 

 Parry & Palmer 39 p. p. (GK), 39 \ p. p. (K). Vera Cruz: Vera 

 Cruz to Orizaba, F. Mueller 999 (K); Maltrata, Jan. 1883, Kerber 

 243 (BK: nom. vernac. "mexixe"). Mexico: low ground, Flor 

 de Maria, 4 Sept. 1890, Pringle 3240 (type coll. : BGK) ; Valley 

 of Mexico, 1856, Schmitz (B). Federal District: base of Sierra 

 de Ajusco, 2380 m., 29 Sept. 1896, Pringle 6550 (BGK); open 

 woods near Eslaba, 2440 m., 18 Sept. 1903, Pringle 11382 (GK). 

 Michoacan: Cerro de Quinzeo, 2590 m., Galeotti 876 (K). Oax- 

 aca: 1842, Ghiesbreght (K). Mexico without locality : Pavon (B). 

 T. 2. Fig. 60. 



106. P. alba Nutt. Stems numerous from a perennial root, often 

 with a cluster of short sterile leafy branches at base, erect or ascend- 

 ing, simple or sparsely branched, glabrous, very narrowly angulate- 

 winged, 2-3.5 dm. high. Leaves mostly scattered, but the lowest 

 (2-7 whorls) or even those to'middle of stem verticillate ; lowest 

 spatulate-obovate, mucronate at the rounded apex, scarcely peti- 

 oled, with subdenticulate margin, 1-nerved, 4-12 mm. long, 1.5- 

 2.5 mm. wide; the others linear, acuminate to the cuspidate apex, 

 0.8-2.5 cm. long, 1-1.5 mm. wide. Racemes densely flowered, 

 conic-cylindric, 2-8.5 cm. long, 5-8 mm. thick, on peduncles 2-8 

 cm. long; pedicels 1 mm. long. Flowers white with green center, 



