6 CHARACEAE AMERICANA. 
N. TENUISSIMA, A.Br. (Desv.) 
Var. Americana. 
A. Braun in Plantes Lindheimerianz, Boston, 1845. 
“Whorls less densely glomerate but more approximate than in the European form.” 
We have received from Mr. A. H. Curtiss, Jacksonville, Florida, some specimens which are 
larger and more open and which may be referred to this variety. Prof. Braun received ex- 
amples from Texas (Lindheimer), and from Massachusetts. 
Another form from N. Jersey, with very dense and approximate whorls, very short 
leaved, terminal leaflets mostly six, fruit very large, intermediate in size between 
tenuissima and batrachasperma, will probably constitute a new species. 
Explanation of Plate I. 
A, natural size of plant. B, main stem magnified. C, fertile branch magnified. D, 
longitudinal section of main stem. 
