89. FONTINALIS. Dill.

556. F. antipyretica. L. St. very long, often 1ft., with long spreading branches; l. ovate-lanceolate, very concave, keeled, nerveless, all on each branch with one margin reflexed on the same side, the other plane, sometimes serrulate near apex; caps. oval or ovate, immersed; lid long conical acute.

Streams and stagnant water. VI. VII.

557. F. squarrosa. L. St. shorter, but elongate; br. numerous, crowded fasciculate, not spreading; l. lanceolate or oblong-lanceolate, concave, not keeled, margin not reflexed, nerveless, entire; caps. similar to last.

Mountain rivulets. VI. VII.