Part 4, 1924] 



POLYGALACEAE 



311 



Racemes eylindric or conic-cylindric, acumi- 

 nate or at least distinctly tapering above. 

 Plants annual, single-stemmed. 

 Wings 1.2-3 mm. long. 



Leaves alternate throughout, or 



whorled only at base of stem. 



Seed glabrous; aril very minute. 



Racemes very dense; bracts 



persistent. 

 Racemes rather loose ; bracts 

 deciduous. 

 Seed pubescent; aril evident. 

 Stem finely stipitate-glan- 

 dular or puberulous. 

 Plant finely stipitate- 

 glandular; seed not 

 rostrate. 

 Plant finely puberulous 

 with eglandular hairs; 

 seed short-rostrate. 

 Stem glabrous. 



Aril tiny, about one-tenth 



as long as seed. 

 Aril one-third to one-half 

 as long as seed. 

 Wings narrowly spat- 

 ulate-obovate; flow- 

 ers rosy. 

 Wings obovate-oval to 

 suborbicular; flow- 

 ers white or purp- 

 lish-tinged. 

 Leaves whorled at least to middle 

 of stem. 

 Sepals shorter than wings, ovate 

 to orbicular-ovate. 

 Flowers white, sometimes 

 purplish-tinged, or 



faintly pinkish. 

 Capsule oval to oblong- 

 oval. 

 Bracts quickly decid- 

 uous. 

 Seed pubescent. 

 Seed glabrous. 

 Bracts subpersistent. 

 Capsule suborbicular. 

 Flowers magenta-pink. 

 Sepals longer than the wings, 

 filiform -subulate from an 

 ovate base. 

 Wings 3-3.3 mm. long. 

 Leaves all alternate. 

 Leaves whorled at least below. 

 Plants biennial or perennial, usually 

 several-stemmed . 

 Leaves not squamiform. 



Capsule 1.3-3.1 mm. long, not 

 ovate-elliptic; seed 1.3-2.5 

 mm. long; aril usually more 

 than half as long as seed. 

 Leaves whorled at least to 

 middle of stem. 

 Seed 1.3-2.1 mm. long; cap- 

 sule 1.4-2.5 mm. long. 

 Seed ellipsoid-cylindric, 



short-beaked at base. 

 Seed ellipsoid, not beaked 

 at base. 

 Aril two-thirds as long 

 as seed or less. 

 Capsule suborbic- 

 ular, 1.3-1. 6mm. 

 long. 

 Capsule oval, 2.2- 

 2.5 mm. long. 

 Aril essentially as long 

 as seed. 



107. P. gracillima. 



108. P. decidua. 



109. P. paniculata. 



110. P. rhynchosperma. 



111. P. leplocaulis. 



112. P. gracilis. 



113. P.verticillata ambigua. 



113. P. verticillata. 



114. P. leplostachvs. 



115. P. Wightiana. 



116. P. asperuloides. 



117. P. Sinaloae. 



136. P. Chapmanii. 



137. P. Hookeri. 



118. P.flagellaris. 



116. P. asperuloides. 

 119. P. Boykini. 



