Blake — Revision of Polygala 57 
0.3-0.5 mm. lata. Caules minus pubescentes. — P. glanduloso- 
pilosum Chod.! Bot. Jahrb. lii. Beibl. 115.72 (1914). —Sawn Luts 
Potosi: Buena Vista, Nov. 1910, Purpus 4913 (Type cotu.: BG); 
Sierra de Guascama, Minas de San Rafael, May 1911, Purpus 
5167 (BG). 
This does not seem specifically distinct from P. macradenia. 
There are no flowers on the specimen of Purpus 4913 in the Gray 
Herbarium, but those of 5167, which comes from the same region 
and is considered identical with 4913 by Mr. Brandegee, are 5.3 
mm. long and thus no smaller than those of P. macradenia. Nor do 
I find a difference in the stigmas of the two. Since furthermore 
various specimens that must be referred to P. macradenia show an 
approach to P. glanduloso-pilosum in leaf-form or pubescence, the 
latter seems best considered as a southern variety of the typical 
more northern P. macradenia. 
Sect. 2. Biloba, sect. nov. Arillus glaber equitans lobis laterali- 
bus 1/4 ad 1/2 longitudinis seminis, dorsali obsoleto. Sepala in- 
feriora petaloidea decidua, superius herbaceum persistens. Species 
typica P. Parryi A. W. Bennett. 
a. Stems a canescent-pilose; lower sepals glabrous; 
flow ROS ae RES ee “1. P. Purpusii. 
71. P. Purpusu Brandegee. Fruticulose, the stems several, 
simply or subsimply branched, erect, up to 2.5 dm. high, densely 
pilosulous with incurved-spreading hairs, the younger parts canes- 
cent. Leaves oval to oblong-oval, rarely orbicular, acute to obtuse 
or rounded at both ends, more or less densely incurved-spreading- 
pubescent both sides, 9-14 mm. long, 4-11 mm. wide, on petioles 
1-2 mm. long. Racemes terminal, sessile or short-peduncled, up 
to 4.5 em. long, loosely 10-13-flowered. Flowers purplish, 44.5 
mm. long, exceeding their pedicels, these equalling the narrowly 
lanceolate bracts. Lower sepals petaloid, purplish, obliquely ob- 
long-obovate, not clawed, 3.5 mm. long, 1.4 mm. wide; upper sepal 
herbaceous, ovate, subglabrous, obtusish, 3 mm. long. Keel 
whitish with yellowish tip, 3 mm. long. Wings obovate-oval, 
barely retuse, 4.7 mm. long, 2.8 mm. wide. Upper petals purplish- 
red, white toward end, united to keel about one-half their length, 
obovate, 4.5 mm. long. Stigmatic lobes approximate at the flaring 
