Blake Revision of Poly gala 103 



/. Leaves obovate-spatulate 137. P. viridis. 



f. Leaves linear or acicular-linear, g. 



g. Capsule 2\ times as long as wings 126. P. semialata. 



g. Capsule snorter, h. 



h. Capsule oblong, about twice as long as wide, i. 



i. Leaves strongly 2-sulcate beneath 130. P. scoparioides. 



i. Leaves not sulcate beneath, j. 

 j. Capsule 2 mm. long; aril 1 mm. long .132. P. dolichocarpa. 

 j. Capsule 2.7-3 mm. long; aril 1.5 mm. long. 



133. P. scoparia. 

 h. Capsule elliptic or suborbicular, not twice as 

 long as wide, k. 



k. Wings about equalling capsule 134. P. michoacana. 



k. Wings distinctly longer than capsule, I. 

 I. Lower sepals ovate, obtusish to acutish, 



not | as long as capsule 135. P. Salviniana. 



I. Lower sepals lanceolate, acuminate, more 



than \ as long as capsule 136. P. oxysepala. 



125. P. pterocarya Chod. Stems slender, diffuse, filiform, 

 flexuous, 2 dm. long, thinly puberulent, from a perennial root 

 Leaves subspreading, scarcely crowded, lance-linear, acute, apicu- 

 late, revolute, thin, 9-12 mm. long, 1-1.8 mm. wide, or smaller. 

 Racemes becoming elongate, with sinuate rachis, cylindric-pyra- 

 midal, 1.5-2 cm. long, 7-8 mm. thick, rather dense, scarcely comose 

 at apex; pedicels 0.6 mm. long. Flowers 3-3.5 mm. long. Sepals 

 ovate, the lower acute, less than half as long as the flower. Wings 

 exceeding corolla, subspatulate, gradually narrowed to base, shortly 

 acute, 3-nerved. Crest of a few rather broad processes. Capsule 

 strongly inequilateral, one cell broadly winged, the wing sinuate, 

 veiny, the other cell narrower, wingless, broadly rugose. Seed 

 curved, sparsely pilose; lobes of aril linear, membranaceous, de- 

 scending, 3/4 as long as seed. Chod. Bot. Jahrb. Hi. Beibl. 115. 

 83 (1914), as P. pterocaryum. Based on Seler 1462, San Cristo- 

 bal Amoltepec, Oaxaca. Not seen; description compiled. 



126. P. semialata Wats. Stems numerous from a fruticulose 

 base, erect or lax, branched, very slender, almost filiform, sparsely 

 and very minutely incurved-puberulous, 8-21 cm. long. Leaves 

 linear, acuminate at both ends, mucronulate, slightly thickened, 

 slightly concave above, 1-nerved and convex beneath, glabrous or 

 microscopically incurved-puberulous, 4.8-8.5 mm. long, 0.5-1 mm. 

 wide, on petioles 0.4 mm. long or less. Racemes terminating stems 

 and branches, 15-22-flowered, 3-12.5 cm. long. Flowers whitish, 

 purplish-green-veined, 1.5-1.7 mm. long. Upper sepal orbicular, 

 the lower oval, round-tipped, greenish, glabrous, 0.6 mm. long. 



