496 © PONTEDERIACES. (PICKEREL-WEED FAMILY.) 
A smooth herb, with fibrous roots, flat and branching stems, short sword-shaped 
equitant leaves, and clustered greenish flowers. 
1. C. flabellata, Desv. Stems mostly creeping or floating; leaves linear- 
sword-shaped ; those of the stem nearly opposite; heads cymose, scattered, top- 
shaped, several-flowered ; sepals rigid, lanceolate-subulate, slender-pointed, the 
exterior ones strongly keeled, and as long as the linear-oblong obtuse capsule, 
much shorter than the flat interior ones; filaments exserted. (Juncus repens, 
Michx.) — Miry banks of streams and ponds, Florida to North Carolina. July. 
— Stems 4° - 3? long. 
ORDER 154. PONTEDERIACE, (PICKEREL-WEED 
FAMILY.) 
. Perennial aquatic or marshy herbs, with perfect mostly irregular flowers 
from a 1-leaved spathe. — Perianth corolla-like, unequally 6-cleft or 6- 
parted, imbricated in the bud, witheritig-persistent. Stamens 3-6, more 
or less unequal, and unequally inserted on the throat of the perianth: 
anthers 2-celled, erect, introrse. Ovary free. Style single: stigma 3-6- 
lobed. Capsule 1—3-celled, 1 —many-seeded. Seeds anatropous. Embryo 
slender in mealy albumen. sert 
1. PONTEDERIA, L. Wawurrr. PICKEREL-WEED. 
Perianth funnel-shaped, 2-lipped, with the upper lip 3-lobed, the lower 3-parted, 
the curved tube fleshy and coiled in fruit. Stamens 6, unequally inserted ; the 
three lower ones exserted, the three upper short and often imperfect: anthers 
oval, blue. Ovary 3-celled, two of the cells empty, the other with a single sus- 
pended ovule. Style slender. Capsule (utricle) 1-seeded. — Rhizoma thick and 
creeping. Stem erect, bearing above the middle a single short-petioled leaf, and 
at the summit a hairy spike of blue flowers, from a 1-leaved spathe. Radical 
leaves long-petioled, sheathing. 
1. P. cordata, L. Stem and terete petioles erect (29—3? high); pem 
(3'- 8' long) varying from round-cordate to lance-oblong, obtuse, finely ; 
spike dense, cylindrical (2'-4' long), the peduncle enclosed in the convolute 
spathe; upper lobe of the hairy perianth spotted with yellow, the tube 
(P. lancifolia, Muhl., and P. angustifolia, Pursh, are narrow-leaved forms.)— 
: Miry margins of ponds and rivers, Florida, and northward. July - Sept- | i 
oe 2. SCHOLLERA, Schreb. | 
Perianth salver-form, nearly equally 6-lobed, the tube elongated and wm 
Stamens 3, nearly equal: filaments subulate : anthers sagittate-oblong, < wh 
