406 



Southern Louisiana, New Orleans (Joor, according to Trelease^ 

 and Pointe a la Hache (Langlois). 



This is Rumex Flondaniis Trelease, but not R. Floridamis Meisner. 

 With the original specimens of R. Floiidmms Meisner at hand I 

 cannot separate them from R. verticiUatiis, to which Meisner says 

 the species is closely related. Prof. Trelease has given the plant 

 its correct position, but referred it to the wrong species. R. Langloisii 

 is intermediate between R. verticillatus and R. altissimiis in these 

 respects : its inflorescence suggests the latter, while its foliage sug- 

 gests that of the former. 



POLYGONELLA Michx. Fl. Bor. Am. 2: 240. 1803. 



[Lyonia Raf. Med. Repos. N. Y. 5: 352. 1808.] 

 [Stopinaca Raf. Fl. Tellur. 3:11. 1836.] 



[GoNOPYRUM F. & M.; C. A. Meyer, Mem. Acad. St. Petersb. 

 (VI.) 4: 144. 1840.] 



Key to the Species. 



Flowers polygamo-dioecious; filaments subulate or filiform, nearly alike or some slightly 

 dilated at base ; embryo axial 



Ocreae fringed with a few bristle-like cilia. i. P. ciliata. 



Ocreae naked. 



Leaves 1-5 mm. broad. 



Achenes rhomboidal ; leaves filiform-subulate. 2. P. brachystachya. 

 Achenes ovoid or oblon^-ovoid ; leaves wedge- 

 shaped or spatulate. 



Stems branched above ; outer calyx-segments 



not reflexed. 3. P. gracilis. 



Stems diffusely branched at the base; outer 



calyx-segments reflexed. 4. P. polygama. 



Leaves 5-25 mm. broad. 5. P. 7nacrophylla. 



Flowers perfect ; filaments dissimilar, the inner conspicuously dilated ; embryo near 

 one of the faces of the endosperm. 



Annual; outer calyx-segments not reflexed, the inner not 



becoming conspicuously larger than the outer. 6. P. articulata. 



Perrennial ; outer calyx- segments reflexed; the inner de- 

 veloping large wings. 7. P- Americana. 



I. PoLYGONELLA CILIATA Meisn. in DC. Prodr. 14: 81. 1856, 



Vicinity of the Manatee river, Florida. 



As late as the year 1894 there seems to have been only one 

 collection of the above species ; this was Rugel's 429, on which 



