NORTH AMERICAN 9 



737. DIDIPLIS Raf. 1833. Calix persistent 

 campanulate 4fid, segments unequal acute. Co- 

 rolla none. Stamens 2, filaments exerted, an- 

 thers rounded, stigmas 2 subsessile. Capsule 

 globular bilocular polysperm. Leaves oppo- 

 site, flowers axillary sessile. — A very distinct 

 Genus blended with Peplis by Nuttal and De- 

 candole, which has a calix 12fid and 6 stamens! 

 the Peplis indica with spicate flowers, calix 8 

 dent. 4 stamens &lc, is also a peculiar Genus 

 Nexilis Raf. meaning not with 6, while Didi- 

 plis means two doubling. 



738. DiDiPLis LINEARIS Raf. atl, J. and flo- 

 rula tex. 16 — Peplis diandra Nuttal in Dec. 

 prodr. — Stem terete ramose, leaves sessile prox- 

 imate decussate patent linear obtuse uninerve, 

 flowers sessile solitary axillary. — An aquatic 

 plant of Red River, Texas and Arkanzas,habit 

 of Callitriche, leaves narrow elongate uncial, 

 flowers small green. In Collins Herb, it was 

 marked a N. G. near Lythrum. 



739. DiPHYLEiA CYMOSA Mx. This fine plant 

 seen by few, is so rare that its existence was 

 doubted by some of our skeptics, notwithstand- 

 ing the two fine figures of Michaux. It is a 

 vernal plant of the Unaka and Cheroki Mts, 

 where few botanists have dwelt or travelled. 

 My specimen in Col. Herb, was collected by 

 Lyons, and is in fruit, the angular stem has only 

 one leaf 6 inches broad, very angular but hardly 

 dentate, the cyme is trifid and ramose, berries 

 subovate obliqual. If it is a deviation it may 

 be called var. trifida. 



740. DISCOPLIS Raf. Dioical, male fl . . . 

 female fl. calix persistent oval hirsute 4dentate, 

 ovary sessile sub4gone warty, stigma sessile 

 large sulcate. Fruit inclosed in calix, indehis- 



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