406 
SYNGENESIA SUPERFLUA, 
scales ovate and lanceolate, hairy. Florets of the ray about five, white; of 
the disk more but not very numerous, white, tubular. Pappwsr none. Re- 
ceptacle chaffy* Scales ovate, lanceolate, acute. 
An exotic like the preceding, not so generally naturalized, but found very 
frequently around buildings. 
Flowers June — August. 
ACMELLA. Rich. 
Involucrum paucifo- 
lium, foliis duplici se- 
rie. Semina tetragona, 
apice truncata, nuda. 
Receptaculum oblong- 
um, paleaceum. 
1. Repens. 
A. caule repente; fo- 
liis ovato lanceolatis, 
denticulatis, tripliner- 
vibus, parce pubescen- 
tibus; pedunculis axil- 
laribus, terminalibus- 
ue, longissimis, uni- 
ons. E. 
Involucrum few lea- 
ved, leaves in a double 
series. Seeds 4-angled, 
truncate at the summit, 
naked. Receptacle ob- 
long, chaffy. 
Stem creeping; leaves 
ovate-lanceolate, tooth- 
ed, triplinerved, a little 
pubescent; peduncles 
axillary and terminal, 
very long, one-flower- 
ed. 
Pers. Syn. 2. p. 473. Nutt. 2. p. 171. 
Anthemis Repens. Walt. p. 211. Pursh, 2. p. 562. 
Spilanthus Repens. Mich. 2. p. 131* 
Root perennial. Stem one to two feet lon'g, recumbent, pubescent, tak« 
ing root at the lower joints. Leaves opposite, ovate-lanceolate, acute, at 
base attenuated into a semiamplexicaule petiole about an inch long. 
Flowers solitary, near the summit of the stem, peduncles three to four in- 
ches long. Involucrum composed of about twelve leaves arranged in a dou- 
ble series, leaves ovate-lanceolate, very acute, equal, pubescent. Florets of 
the ray about twelve, yellow, unequally three : toothed, twice, as long as the 
involucrum; of the disk numerous, tubular, with the border five-cleft. An- 
thers short, yellow. Style longer than the florets of the disk, two-cleft. 
Seeds oblong, obovate, compressed, naked. Receptacle chaffy. Scales 
obovate, acuminate, yellow. 
Grows in wet soils. 
Flowers September — October. 
