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TPOtTHG-CmiJM SAWITTATUM.
OA'-BI/Jil ©So
POLYGONUM SAGITTATUM.
ARROW-LEAVED TEAR-THUMB.
Octandria Trigynta, Linn. Polygonese, Juss.
GENERIC CHARACTER.
Calix S-parted, petaloid, persistent. Seed 1, superior, 3-sided, covered by the conni-
vent calix. (The number of the styles and stamina uncertain.)
SPECIFIC CHARACTER.
Flowers in heads, octandrous, with the style 3-cleft; stem retrorsely aculeate; leaves
sagittate. Mich.
A w e a k decumbent annual plant, supporting itself by clinging to
other plants. Stem green, four-sided, beset backward with prickles,
not so rigid as those of the preceding species, but injuring the fingers
in the same manner if handled. Leaves shaped like the head of an
arrow, with the margins curved in an arch from the apex to the base
of the auricles. Flowers white, in clusters. Petals white, tinged with
YOL. III. 23
