60 
SYNEDRELLA nodiflora. 
Sessile-flowered Synedrella. 
SYNGENESIA POLYGAMIA SUPERFLUA— Nat. Ojiij. COMPOSITMr 
Div. CorymbifeKjE, De Cand. — Synanthere/E, Trib. Heliantheje, Cassini. 
Gen. Char. — Involucrum diphyllum. Receptaculum paleaceum, glumaceum-. 
Semina planiuscula, margihata, bicornia, dissimilia, disci marginibus inte- 
gris, radii inciso-dentatis. 
Synedrella nodiflora. 
S. nodiflora, G^ertn. De FrucL p. 456. t. 171--— Rich, in Pers. Syn. v. ii. 
p. 4-72. 
Verbesina nodiflora, Linn. Sp. PL p. 1271. — Willd. Sp. PL v. iii. p. 2226. 
— ^AiT. HorL Kerv. ed. 2. v. 5. p. 121. 
An unattractive, herbaceous annual, with a fibrous root, and a cylindrical, 
glabrous, succulent, erect stem, about one foot or one foot and a half 
high ; often branched near the base, the branches opposite. Leaves in 
distant pairs, opposite, the upper ones the largest, 3 inches long, all ovate, 
rather acute, flaccid, roughish with pubescence, 3-nerved at the base, 
the margin serrated, the base attenuated into a longish footstalk, which 
is connate with the footstalk of the opposite leaf, and has its margins ci- 
liated below. 
Flowers axillary and terminal, sessile, single or 2 or 3 together, small. /«- 
volucre cylindrical, of 2 green, slightly hispid, erect leaflets, their extre- 
mities patent, acute. Florets fev/, yellow, each within a chaffy scale, of 
which the'outermost ones are large, and like the leaflets of the involucre ; 
the inner ones gradually smaller. Florets of the ray about 4, semifloscu- 
lose, scarcely longer than the involucres, tube slender, limb ovate, notch- 
ed : Stamens none. Germen ovate, with a broad and laciniated border, 
and, in the place of a pappus, two acute, serrated, longish, lanceolate 
teeth. Style bifid. Florets of the disk tubular, with 4 pubescent teeth. 
Anthers brown. Germen ovato-oblong, margined, the margin entire, 
terminated by two very long, almost setaceous teeth, nearly equal in 
length to the Floret. The seeds ov pericarps similar in shape to the Ger- 
men, but thicker, larger, and with the inner surface nearly plane and 
wrinkled, the outer one convex, smoothish. 
VOL. L 
