10 TEXAS RESEARCH FOUNDATION: CONTRIBUTIONS, VOLUME 5 
39. P. reticulata. 
40. P. reticulata var. sinuata. 
41. P. crenulata. 
42. P. membranacea. 
43. P. fusca. 
44. P. oblanceolata. 
SECTION II 
Inflorescences axillary 
Pubescence of branchlets and undersurface of leaves 
usually rather coarse and conspicuous, the hairs 
mostly GfO0bsc. <a 85 ee ad | ete Series 11-13, pp. 123-137. 
Pubescence of branchlets and undersurface of leaves 
fine and inconspicuous, the hairs usually closely 
SPPTEBNOD . . ooo a es eee Series 14-23, pp. 137-192. 
Series 11-13 
Hairs usually simple, or stalked and bifid, or stellate 
Beal oa a Series 11, pp. 123-130. 
45. P. vestita. 
46. P. Schultesii. 
47. P. pleurobotryosa. 
Hairs mostly dendroid :.. 3.02..5> 20 ce ee, Series 12-13, pp. 180-137. 
Series 12-13 
Sepals less than 1 mm. long; leaves glabrescent beneath, 
not tomeniiogs. 5 ee Series 12, pp. 130-131. 
48. P. Oerstediana. 
Sepals up to 2.5 mm. long; leaves tomentose beneath. ... Series 13, pp. 130-137. 
49. P. reflexa. 
50. P. calophylla. 
Pubescence of branchlets and undersurface of leaves 
fine and inconspicuous, the hairs usually closely 
appressed 050. oi oo ee, Series 14-23, pp. 137-192. 
Series 14-23 
Anthers conspicuously black-punctate dorsally... ... Series 14-15, pp. 1387-153. 
Anthers concolorous, orange-punctate or with scat- 
tered minute reddish or black glands dorsally... . . Series 16-23, pp. 153-192. 
Series 14-15 
Inflorescences short villous-pubescent, the hairs unequal, 
not dense. 2. oe uc cic ee Series 14, pp. 137-142. 
51. P. villosa. 
52. P. Conzattit. 
Inflorescences puberulent or tomentulose.............. Series 15, pp. 141-153. 
53. P. stenophylla. 
