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SYNGENESIA : POLYGAMIA ^QUALIS. 461
is feflile and plumofe, and confifts of eleven or
twelve branched rays.
The dry ftalk and calyces of this plant often con-
tinue Handing for a whole year after the feeds
have ripened, a milerably looking fkeleton ! Lin.
FL Suec,
BIDENS. Gen. pi. 932.
Difcoide^.
Recept. paleaceum. Pappus ariftis eredis, fcabris.
Cal. imbricatus. Cor. rarlus flofculo uno alterne
radiante inftruitur.
tripartita 1 BIDENS foliis trifidis, calycibus fubfoliofis, femi-
nibus eredlis. Sp. pL 1165. {Ger. em. Jii.f. i.
Loes. FL PruJ. p. 53. /. 10. Moris, hiji. f. 6.t. ^.
/. 20. Pet. herb. t. 20./. 7.)
Trifid Water-hemp-agrimony, or Bur-marygold.
Anglis.
By the fides of rivulets, ditches and lakes frequent.
O. VIU.
The flaik is two feet high, and branched : the
leaves are divided into three and often five lan-
ceolate ferrated lobes : the upper leaves are fmir
pie and oval4anceolate : the heads of flowers
terminate the branches, and grow credl : under
the calyx is a circle of green ciliated leaves : the
fcales of the calyx are oval, obtufe, erecl, of a
green color, ftrcaked with black, and loofely
imbricated : the interior ones have yellow mar-
gins, and approach to the nature of the florets :
the

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