509 
JUNCACEJE. (RUSH FAMILY.) 
the principal erect involucral leaf, dense, the numerous crowded flow- 
ers one-sided; sepals lanceolate, acute, greenish , shorter than the ovoid- 
obtong obtuse pod.- Sandy coast of New England and Long Island 
occasionally onTiver-banks in the interior. 
* 9 *, J : Gerfirdi » Loisel * (Black Grass.) Stems simple, flat- 
, ’ lea fVf J g ,d ( H° high) ; panicled cyme longer than the involucral 
leaves, rather crowded; sepals ovate-oblong, obtuse (the outer deep 
chestnut-brown, with a green keel), nearly the length of the obovoid 
obtuse pod. (J. bulbosus, Pursh, &c.) — Salt marshes, common 
a on g the coast, forming large patches, with deep green foliage and 
dark fruit. July. ^ 
20. J. buionius, L. Annual; stems low and slender (3'-9' 
high), leafy, often branched at the base ; panicle forking, spreading, 
the flowers remote (greenish); sepals lanceolate, awl-pointed, much 
longer than the oblong obtuse pod. —Low grounds and road-sides, 
very common. June-August. 
Order124.PONTEDERIACE,E.(Pickerel-weedFam.) 
Aquatic herbs, with perfect more or less irregular flowers 
from a spathe; the petal-like 6-merous perianth free from 
the S-celled ovary ; the 3 or 6 mostly unequal or dissimilar 
stamens inserted in its throat. — Perianth with the 6 divis¬ 
ions colored alike, imbricated in 2 rows in the bud, the 
whole together sometimes re volute-coiled after flowering, 
withering away, or the base thickened-persistent and in¬ 
closing the fruit. Anthers introrse. Ovules anatropous. 
Style 1: stigma 3-lobed or 6-toothed. Fruit a perfectly or 
incompletely 3-celled many-seeded pod, or a 1-celled 1- 
seeded utricle. Embryo slender, in floury albumen. 
Synopsis. 
1. Ponte deri a. Perianth 2-lipped, the fleshy base inclosing the 1- 
seeded utricle. Stamens 6. 
2. Heteranthera. Perianth salver-shaped, withering-fugacious. 
Pod many-seeded. Stamens 3, unequal, of 2 forms. 
3. Schollera. Perianth salver-shaped, regular. Stamens 3, alike. 
*-• PONXEDEBIA, L. Pickerel-weed. 
Perianth funnel-form, 2-lipped, the 3 upper divisions united to 
lorm the 3-lobed upper lip, the 3 lower spreading, and their claws, 
which form the lower part of the curving tube, more or less sepa- 
43* 
