60 
straw colored, but sometimes quite dark; pericarp dull and dark. 
This species occurs in various forms, some of them very small and 
bushy, 2 or 3 inches high, others a foot or more high, and nearly 
capillary, the foliage generally a dusky purple, but sometimes a 
bright green. 
Var. ROBUSTA, Morong, Bot. Gaz. x. 255 (1885). 
Stem stout, comparatively few leaved, internodes long, sparsely 
branched, 3-6 feet high. 
Ponds and rivers in Eastern Massachusetts, New York, Michi- 
gan and Texas. 
The typical plant is widely diffused in North America, being 
found in Canada, from the Atlantic to the Pacific, and equaliy 
common in the United States and Mexico. It is as widely dis- 
tributed in the Old World. (Plate LXVI.) 
3. Naras GUADALUPENSIS (Spreng.) Morong. 
Caulinia Guadalupensis, Spreng. Syst. 1. 20 (1826). 
N. flexilis, var. (? ) fusiformis, Chap. Fl. 444 (1860). 
N. flexilis, var. Guadalupensis, A. Br. Seeman's Jour. Bot. ii. 274 
(186. 
N. microdon, var. Guadalupensis, A. Br. Rep. Nat. His. Soc. Berl. 
June 16, 1868. 
N. microdon, Morong, Bot. Gaz. x. 255 (1885). 
Stems almost capillary, 1-2 feet high, numerously and widely 
branched from the base. Leaves numerous, 15—34 of an inch long, 
ц-м of a line broad, acute, opposite or 3-5 fascicled, frequently 
recurved, with sheaths and teeth like those of N. flexilis, but gen- 
erally with 40-50 teeth on each edge of the leaf. Fruit about 1- 
line long; pericarp dark and strongly marked by 16-20 rows of 
hexagonal or rectangular reticulations which are transversely ob- 
long; seed straw-colored, not shining. 
This species is easily confounded with N. flexilis, but is clearly 
distinct in its long narrowly outlined branches, its short leaves, 
and especially in the markings of the fruit and seed. 
. Florida (A. H. Curtiss, Chapman); Louisiana (Langlois); Texas 
(Lindheimer, Reverchon); Nebraska (T. A. Williams); Oregon 
(Howell). West India Islands (Duchassaing, Wright). Mexico 
(Müller. (Plate LXVIL) 
