32 KEOBOT. 



folioles lanceolate, upper leaf sessile trifoliate, 

 lanceolate serrulate, involucres lanceolate re- 

 flexed. — Found from New Jersey to Illinois, in 

 waters, rare, pedal and bipedal, folioles about 3 

 inches long, all serrulate sessile except the odd 

 one ; umbel with about a dozen of umbellules, 

 6 to 8 small folioles for involucres, the partial 

 still fewer and smaller less reflexed, flowers 

 while as in the Genus, quite distinct from & 

 latifolia and akin species. 



808. PHAIOSPERMA Raf. herb. 1833 

 page 77. Polygamous, Invol, one, partial few. 

 Calix 5dentate, petals obcord ate involute, styles 

 elongate, stigmas capitate. Fruit smooth fiin- 

 gose ovate convex with a thick integument, no 

 ribs nor angles nor wings nor thicker edge. 

 Leaves sometimes opposite^ potytome, flowers 

 white small, seeds brown. — This G. which was 

 pronounced new by Torrey and a Polytenia by 

 Nuttal, differs from it, as will be seen below,and 

 chiefly by the involucre and the seeds convex 

 and not concave outside. The name alludes 

 to the brown seeds. I have corrected the char- 

 acters by withdrawing from it Ph. verticillata, 

 but uniting a new species. 



809. Phaiosperma trifida Raf herb, stem 

 dichotome subcostate, leaver alterne and sub- 

 opposite cuneate triparted, segments oblong 

 subequal tridentate ; involucre unique, partial 

 2-4linear— discovered in 1823 in the Western 

 glades of Kentucky, pedal, vernal, leaves short, 

 flowers small, seeds of a bay brown. 



810. Phaiosperma pulverulenta Raf glau-- 

 cous pulverulent, stem dichotome striate, leaves 

 alternate triparted segments oblong pinnatifid ; 

 mvolucre often lacking, partial 5-8 linear color- 

 ed—In Florida, found by Kin or Baldwin, 



