PONTEDERIACEZA. 385 
ed. 5, p. 545; Benth. Pl. Hartw. p- 25; S. Wats. in Proc. Am. Acad. xviii. p. 166; 
Bot. Mag. t. 6192. 
Pontederia limosa, Swartz, Fl. Ind. Oce. i. p. 611. 
Heteranthera alismoides, Humb. et Bonpl. in Link Jahrb. iii. p. 78. 
Leptanthus ovalis, Michx. Fl). Bor.-Am. i. p. 25, t. 5. fig. 1. 
Vireinia and ILuinois southward.—NortH Mexico, region of San Luis Potosi, 6000 
to 8000 feet (Parry & Palmer), Morales (Schaffner); Soura Muxico, Aguas Calientes 
(Hartweg), Vera Cruz to Orizaba (Miller, 457), Zacuapan, Vera Cruz (Linden, 55); 
Nicaraeva, without locality (Lévy)—CotomsBia to Paraguay, and in the West Inpins 
Hb. Kew. 
3. Heteranthera mexicana, S. Wats. in Proc. Am. Acad. xviii. p. 166. 
Nortu Mexico, Juraz on the Sabinas River, Coahuila (Palmer, 1324). Hb. Kew. 
4, Heteranthera reniformis, Ruiz et Pav. Fl. Peruv. et Chil. i. p. 43, t. 71; 
Solms in Monogr. Phanerog. iv. p. 519; A. Gr. Man. Bot. Northern U.S. ed. 5, p. 545. 
Heterandra reniforme, Beauv. in Trans. Am. Phil. Soc. iv. p. 173, cum icone. 
Buchosia aquatica, Vel. Fl. Flum. i. t. 80. 
Leptanthus reniformis, Michx. Fl. Bor.-Am. i. p. 24. 
Heteranthera pubescens, Vahl, Enum. ii. p. 43, ex, Mart. et Gal. in Bull. Acad. Brux. ix. (reprint, 
- 11). 
Hatorentiera acuta, Vahl, l.c. p. 42. 
New York and ILLinois southward.—GuatemaLa (Friedrichsthal); VENEZUELA to 
ARGENTINA. 
B. peduncularis, Solms in DC. Monogr. Phanerog. iv. p. 520; Benth. Pl. Hartw. 
p. 25 (species). 
Heteranthera reniformis, var. multiflora, Griseb. in Abhandl. K. Gesell. Wiss. Guett. xxiv. p. 323. 
SoutH Mexico, Oaxaca ((aleotti, 5364), Orizaba (Bourgeau, 3284); GuaTEMaLa, 
Alta Vera Paz (Tiirckheim, 394), Izabal (Bernoulli, 901) ; Nicaracua (Zate, 429); 
Panama, Chagres (Fendler, 294), near the city of Panama (Seemann, 329).—CoLomBia 
to ArcENTINA. Hb. Kew. 
[This is the position of the Philydracew, an order consisting of three genera and four 
species inhabiting Australia, Polynesia, and Eastern Asia; of the Xyridew, comprising 
two genera and between forty and fifty species, widely dispersed in the warmer regions, 
both of the Old World and America, and ranging in the latter country from New 
J ersey through the Eastern States to Florida and Georgia, the West Indies, and in 
South America from Venezuela and Guiana to Peru and Brazil, though hitherto no 
member of the order has been found within our limits; and of the Mayacee, an order 
of one genus, Mayaca, of which about seven species are known, one inhabiting North 
America, from North Carolina to Florida, another the West Indies, and the rest South 
America. | 
BIOL. CENTR.-AMER., Bot. Vol. III., February 1885. | 8d 
