440 ALISMACEA, 
4, LIMNOCHARIS. 
Limnocharis, Humb. et Bonpl. Pl. Aiquin. i. p. 116, t. 34; Benth. et Hook. Gen. Plant. iii. p. 1009. 
An exclusively Tropical-American genus, of three or four species. 
1. Limnocharis flava, Buch. Ind. Crit. Butom. p. 4; Micheli in DC. Monogr. 
-Phanerog. iii. p. 89. 
Alisma flavum, Linn. Sp. Pl. ed. 2, p. 486. 
Limnocharis emarginata, Humb. et Bonpl. Pl. Aiquin. i. p. 116, t. 84; H. B. K. Nov. Gen. et Sp. 
i. p. 248. 
Limnocharis plumieri, L. C. Rich. Mém. Mus. Par. i. pp. 370 et 374, tt. 19 et 20; Bot. Mag. 
t. 2525; Kunth, Enum. Pl. ii. p. 167. 
Limnocharis laforesti, Duchass. ex Griseb. in Bonplandia, 1858, vi. p. 11. 
GuaTEMALA (hb. Vindob. ex Micheli); Nicaragua, neighbourhood of Granada (Lévy, 
73); Panama (Seemann, 183, 184; S. Hayes, 417).—Cotomsia to Piru, Guiana, and 
BRAZIL. 
Order CLVII. NAIADACE. 
Naiadacee, Benth. et Hook. Gen. Plant. iii. p. 1009. 
As limited by Bentham and Hooker this Order includes several groups, some of which 
have been regarded as independent orders by various botanists and variously combined 
by others. They are:—Juncaginee, Aponogetoner, Potamex, Posidonies, Zanni- 
chelliese, Zosteree, Naiadex, and Cymodocee, ranking as tribes in the ‘Genera 
Plantarum.’ There are sixteen genera, comprising about 120 species, all herbaceous 
and mostly aquatic or marsh-plants, some of them inhabiting salt water. The Order 
is represented all over the world; and probably several genera, besides those of which 
we have seen specimens, exist within our limits, though they do not appear in any of 
our collections—such, for instance, as Ruppia, Zannichellia, and Zostera. 
1. TRIGLOCHIN. . 
Triglochin, Linn. Gen. Plant. n. 453; Benth. et Hook. Gen. Plant. iii. p. 1012. 
About twelve species, diffused over nearly all temperate and cold regions, and in 
places extending into subtropical regions. 
1. Triglochin maritimum, Linn. Sp. Pl. ed. 1, p. 105; Kunth, Enum. Pl. iii. 
p. 145; Lam. Ill. t. 270; Micheli in DC. Monogr. Phanerog. iii. p. 105. 
Triglochin mexicanum, H. B. K. Nov. Gen. et Sp. i. p. 244. 
Arctic Recions southward.—Sour Mexico, between Lake San Cristofer and Carpio 
at about 7000 feet (Humboldt & Bonpland).—Pataconta and Fureta; all over Europe 
and almost everywhere in Temperate Asia. Hb. Kew. | 
We have seen no Mexican specimens of this plant. 
