32 NEOBOT. 



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 

 white as in the Genus, quite distinct from S, 

 latifolia and akin species. 



808. PHAIOSPERMA Raf. herb. 1833 

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

 Calix 5dentate, petals obcordate involute, styles 

 elongate, stigmas capitate. Fruit smooth fun- 

 gose ovate convex with a thick integument, no 

 ribs nor angles nor wings nor thicker edge. 

 Leaves sometimes opposite, polytome, 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. verticillatay 

 but uniting a new species. 



809. Phaiosperma trifida Raf. herb, stem 

 dichotome subcostate, leaves alterne and sub- 

 opposite cuneate triparted, segments oblong 

 subequal tridentate ; involucre unique, partial 

 2-4Hnear — 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 ; 

 involucre often lacking, partial 5-8 linear color- 

 ed — In Florida, found by Kin or Baldwin, 



