PONTEDERIACEjE. (pickerel-weed family.) 511 
ar oblong-arrow-shaped anthers (or rarely a fourth which is abor¬ 
tive): filaments nearly equal, awl-shaped. Pod oblong, invested 
by the withered perianth, 1-celled with 3 projecting parietal pla- 
cent* many-seeded. — A grass-like herb, like a Pondweed, grow- 
ing wholly under water, only the (small pale yellow) flowers ex¬ 
panding on the surface, with slender branching stems, clothed 
with linear translucent sessile leaves, and terminal 1-flowered 
spathes. (Named after one Scholler, a German botanist.) 
f' f aminCa ’ WilId ' (Leptanthus, Michx. He.eramhera, 
VaJil.) In streams, common. July - Sept. % Stems 4°- 2 ^ long. 
Order 125. COMMELYIVACE^. (Spiderwort Fam.) 
Herbs, with fibrous or sometimes thickened roots, jointed 
often branching leafy stems, and chiefly perfect and 6-an - 
drous, often irregular, flowers with the perianth free from 
the 2-S-celled ovary, and consisting of a distinct calyx 
and corolla, viz. : Sepals 3, persistent, commonly herba¬ 
ceous. Petals 3, ephemeral, decaying or deciduous. Sta¬ 
mens hypogynous, some of them often sterile : anthers with 
2 separated cells. Style 1: stigma undivided. Pod 2-3- 
celled, 2- 3-vaIved, Ioculicidal, 3 - several-seeded. Seeds 
orthotropous. Embryo small, pulley-shaped, partly sunk 
in a shallow depression at the apex of the albumen. Leaves 
ovate, lanceolate or linear, flat, sheathed at the base ; the 
uppermost often dissimilar and forming a kind of spathe. 
Dill. Day-flower. 
Flowers irregular. Sepals somewhat colored, unequal, the 2 
lateral partly united by their contiguous margins. Two lateral 
petals rounded or kidney-shaped, on long claws, the odd one 
smaller. Stamens unequal, 3 of them fertile, one of which is bent 
inward : 3 of them sterile and smaller, with imperfect cross-shap¬ 
ed anthers : filaments naked. Pod 3-celled, two of the cells 2- 
seeded, the other 1-seeded or abortive. — Stems branching, often 
procumbent and rooting at the joints. Leaves contracted at the 
base into sheathing petioles; the floral one heart-shaped and 
clasping, folded together or hooded and forming a kind of spathe 
