NEW SPECIES OF CONVOLVULUS. 329 
exhibiting a much more sharply angled leaf, the basal lobes 
of which are far more pronounced in size, and at a wider 
angle of divergence from each other. The stigmas also in 
our plant are narrower and more elongated. The seeds, if 
ever observed, are likely to show character; but it is re- 
markable that, of our plant as well as of the European, 
these are seldom found. 
C. LIMNOPHILUS. Subterranean parts quite as in the pre- 
ceding, the stem more slender, closely twining from base to . 
summit, mostly only 2 or 3 feet high, the herbage glabrous 
or only obseurely puberulent or pubescent: leaves narrow, 
sagittate, the basal lobes nearly or quite entire, a fourth or 
a third as long as the body, this acute of acuminate: bracts 
large, closely enfolding the calyx but unequal, the lower and 
larger strongly auricled at base and partly enfolding the 
truncate upper one: corolla large, pinkish: capsules appar- 
ently all seminiferous, the 3 or 4 seeds large, dull-black, 
sparingly muriculate-roughened. 
Plentiful in tidal marshes about the northern end of San 
Francisco Bay and its tributaries; rooting in tidal mud, and 
twining upon the maritime reeds and rushes of the district; 
in the Bay-Region Manual erroneously treated as mere C. 
sepium, from which its sagittate leaves, very peculiar bracts, 
and its hydrophilous nature declare it distinct. 
C. GRACILENTUS. Roots fibrous; the tufted ascending 
stems a foot high or more, slender, not twining except 
feebly at the sterile leafy summit above the flowers: herbage 
eanescently villous: leaves an inch long or more, triangular- 
sagittate, the moderately divergent basal lobes more than 
half as large as the main blade, the slender petioles hardly 
a half-inch long: axils of the middle leaves bearing each an 
elongated and almost filiform one-flowered peduncle, this 
with a single pair of leaves (like the ordinary ones, but 
smaller) about 4 inch below the calyx: the unequal sepals 
Prrronta, Vol. III. Pages 329-344. 24 Sept., 1898. 
44 
