POLYGAMIA, SUPERFLUA. 
May-weed. 
Wild Chamomile. Stinking Chamo- 
mile. Dog's Fennel. 
A well-known weed, resembling common Chamomile, 
jl Flowers white. In wastes every where, and in profusion in 
the streets of our suburbs. Possesses medicinal virtues. (See 
I Veg. Mat. Med. U; S.) Annual. All summer. 
322. ACHILLEA. Gen. pi. 1313. {Corymhifer<F.) 
Calix ovate^ imbricated. Raijs 5 to 10^ 
roundish. Receptacle paleaceous. Pappus 
none. 
127 
! 1. A. leaves bipiniiatifid, hairy ; the segments li- millefolium. 
near-dentate, mucronate i stem furrowed.— 
' Smith and Willd. 
Icon. FI. Dan. 737. Engl. Bot. 758. Wood- 
ville’s Med. Bot. vol. 1. p. 179. t. 64. 
Yarrow. Milfoil. 
Yarrow has been introduced from Europe, but is now per- 
fectly naturalized. About eighteen inches high. Flowers 
white. Possesses medicinal virtues. (See Woodville’s Med, 
Bot.) In fields, hedges, and by fences, every where common. 
Perennial. June, July. 
323. HELIOPSIS. Pers. Syn. 2. p. 473. {Corymbifera.) 
Calix imbricated^ scales subovate^ lined. 
Rays large and linear. Receptacle palea- 
ceous;, conic^ palsea lanceolate. Seeds 4- 
sided. Pappus none.^ — J\*utt. 
1. H. leaves opposite, ovate-serrate, three-nerved, laevi?, 
— Fers. 
Heliopsis Isevis, Pers. 
Buphthalmum helianthoides, Willd. 
Helianthus leevis, Sp. PI. 1278. and L’Herit. 
Stirp. 
Rudbeckia oppositifolia, Sp. PI. 1280. 
Silphium solidaginoides, Sp. PI. 1302. 
