276 BOTANICAL GAZETTE. 
Rio Grande du Sud, and Uruguay. 1 was greatly surprised - 
see specimens collected in 1884 by Mr. Langlois near Vermil- 
lionville in Western Louisiana, kindly sent me by Mr. Watson. 
They are quite identical with the ordinary South American forms, 
from which they differ only in the want of the small margin of 
the seeds; but this margin, that formerly seemed to me to bea 
section character, is often absent also in some species nearly al- 
lied to C. glutinosa. | 
16. C. aspera Chapm. 1865: no. 149 of Koehn. Mon. |. c. 
vol, ii. p. 161 and vol. iv. p. 400. St. Joseph, Florida. This 
species represents, geographically, a pendant to the preceding, 
or it belongs to the South American group Qidemation, which 
inhabits the extra-tropical parts of Brazil, Paraguay, and the 
northern parts of the Argentine Republic. It is very like the 
Brazilian C. hyssopoides St. Hil. 
17. C. petiotata Koehne: no. 178 of Koehn. Mon. |. ¢. 
vol. ii. p. 173. (Lythrum petiolatum L. 1753: GC. viscosisstnd 
Jacq. 1772: Lythr. Cuphea L. fil. 1781, pro parte: Silene axillaris 
Leavenw. sec. Torr et Gray.) From Connecticut and Pennsy!- 
vania to Georgia, and from Missouri to Louisiana. Since Lin- 
nus’ son confounded this species with the subsequently distin- 
guished C. Balsamona Cham. et Schlecht., and consequently said 
it was to be met with also in Brazil, all subsequent authors have 
made erroneous statements as to its geographical distribution. 
{t inhabits only the United States from the region of the Missis- 
sipp eastward, and belongs to the very marked group Heterodon, 
which is exclusively Mexican or Central American. : 
tis not impossible that C. Wrightii A. Gray, a species nearly 
allied to the preceding and inhabiting Mexico northward to the 
Rio Grande, may be discovered in South-western Texas or it 
New Mexico. 
VI. Nes.va Commers ed. HBK. 
18. N. Lonerprs A. Gray, 1852: no. 306 of Koehn. Mon. I. 
¢. vol. iii. p. 335. Western Texas and North-eastern Mexico. 
A very near ally of the West African N. linifolia Welw. . 
Hiern, and of the Australian N. Robertsii F. v. Muell., both © 
which are very similar to it. The genus Nesca is probably the 
oldest of the whole order. It is nearly allied to Ammannia, from 
which it differs chiefly in the complete septa of the ovary, the 
septa of Ammannia being incomplete above the placenta. 
Heimia salicifolia Link, that reaches the north of, Mexi¢®, 
may hereafter be discovered in New Mexico or Texas. peer 
is to be separated from Nescea, although closely related, by the 
