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TRIXIS SENECIOIDES 
Groundsel-like Trixis. 
SYNGENESIA POLYGAMIA iEQUALIS.— Nat. [Ord. CICHORACEJE, 
Div. LABIATIFLOR^, De Cand.—Tnm. NASSAU YI^, Cass. 
Gen. Char. — hivolucrum ovatum, imbricatum, foliolis ina?qualibus. Flosculi 
omnes hermaphroditic!, bilabiati, exteriores majores radium aemulantes, 
labio exteriore piano majore tridentato ; interiore parvo bidentato. Pap- 
pus pilosus, sessilis. Receptaculum nudum aut subpilosum. — Be Cand. 
Trixis senecioides ; herbacea pubescens, foliis sinuato-pinnatifidis denta- 
tis, caulinis amplexicaulibus. 
An annual, herbaceous, slender plant, of about one foot, or a foot and a half 
in height. Stem branched, especially upwards, in a dichotomous manner, 
branches pubescent. Leaves distant, the lower ones 3 or 4 inches in 
length, oblong, rather narrower towards the base, when they become semi- 
amplexicaul, throughout their whole length sinuato-pinnatifid ; the seg- 
ments rounded, and more or less toothed : the upper leaves (mostly at 
the dichotomies of the branches) much smaller, toothed and lobed at the 
margin, waved and subtortuose, amplexicaul, broad and almost auricu- 
lated towards the base, all of them rather dark green, and very minutely 
pubescent, on the under side whitish and somewhat cottony. Flowers of 
a moderate size, pure white. Involucre hemispherical, composed of se- 
veral linear-lanceolate, imbricated, erect, pubescent scales, the outei-most 
of which are the smallest. Receptacle flat, punctated, naked in the 
centre, near the margin having a circle or single series of upright, gla- 
brous, chaffy, linear-oblong, denticulated scales, nearly equal in height 
to those of the involucre. 
Florets, a few of the larger ones on the outside of the chaffy scales of the 
receptacle, but the greater number within them, tubular in the lower half, 
above divided into two very unequal ligulate lips ; of these the outer one 
is much the largest, ovato-oblong, more or less recurved, and obscurely 
3-toothed at the extremity, pure white ; the interior one small, revolute, 
ligulate, at first white, at length transversely wrinkled and horn-colored. 
The larger lip I have, in one instance, seen divided into two unequal 
portions longitudinally. 
Stamens 5, syngenesious. Anthers yellow, their base produced on each side, 
their extremities with long upright appendages, which, from a yellowish 
colour at first, become afterwards almost black. Germen oblong, hispid, 
VOL. II. 
