406 



SYNGENESIA &LPERFLUA 



scales ovate and laiioeolate, hairy. 



Florets of the ray about five, white; of 



Re- 



the disk more but not very numerous, white, tubular. Pappus none 

 ceptade chaffy. Scales ovate, lanceolate, acute. 



An exotic like the preceding, not so generally naturalized, but found very 



frequently around buildings. 



Flowers June — August. 



ACMELLA. Ricli. 



Involucrum pauci fo- 

 lium, foliis duplici se- 

 rie. Semina tetragona. 



Involucrum few lea- 

 ved, leaves in a double 



series. Seeds 4-anded, 



apice truncata 



^ 



nuda. truncate at the summit 



i 



Receptaculum oblong- 

 ura, paleaceum. 



1. Repens. 



A. caule repente; fo- 

 liis ovato lanceolatis, 

 denticulatis, tripliner- 



vibus, parce pubescen- 

 tibus; pedunculis axil- 

 laribus, terminalibus- 



longissimis, uni- 



naked. Receptacle ob- 



long, chaffy. 



Stem creeping; leaves 

 ovate-lanceolate,tooth- 



ed, triplinerved, a little 

 pubescent; peduncles 



illary and termi 



ij 



ue, 

 oris. 



t 



very 



S^ 



flower 



E. 



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 long, recumbent, pubescent, tak- 



ing root at the lower joints, 

 base attenuated into 



heaves opposite, ovate-lanceolate, acute, at 

 semiamplexicaule petiole about an inch long* 

 Flowers solitary, near the summit of the stem, peduncles three to four m- 

 ches long. Involucrum composed of about twelve leaves arranged in a dou- 

 ble series, leaves ovate-lanceolate, very acute, equal, pubescent.. Florets oi 

 the ray about twelve, yellow, unequally three-toothed, twice as long as the 

 involucrumj of the disk numerous, tubular, with the border five-cleft. ^^ 

 tkers short, yellow. Style longer than the florets of the disk, two-ckit- 



Seerk oblong, obuvate, compressed, naked. Receptacle chafiy. Scd^^^ 



dbovat*^, acuminate, yellow. 

 Grows hi wet soils. 



Flowers September— October, 



