50 
ACHILLA. 
ding.— In Florida* small leaves and flowery 
near to A. pilosa . Seen dry. 
ACHILLEA. Well known natural Genus* 
which has been increased to 7 N. American 
species. 
1. A. millefolium. L. the common yarrow 
or milfoil, see my medical flora : our American 
Sp. is not introduced, it has been deemed pecu- 
liar by some botanists, having stronger medical 
properties, and it has produced several varieties* 
that are becoming species ! All in Autikon. 
Var. rosea, with rose colored flowers. 
Var. carnea , flowers of a pale flesh color. 
Var. pumila. Dwarf, 4 to 6 inches high. 
Var tenuifolia. Leaves nearly glabrous, with 
slender well divided segments, almost pecti- 
nated. 
2. A. gracilis Raf. fl. texensis 12. Stem slen- 
der stiated, leaves remote, narrow smooth, lower 
petiolated recurvate, pinnate, folioles narrow 
laciniate, corymb small glomerate. — In Arkan- 
sas and Texas, only 6 inches hfgk, fl. white. 
3. A. ptarmica, doubtful, seen by few botan- 
ists, undescribed: perhaps same as 7. 
4. A. set ace a, near gracilis , differs by 
leaves mucronate pilose. 
5. A. LANULOSA Nuttal. A. tomentosa Pur f sh 
not Wikienow nor ^Hooker. Silky, segments 
crowded, corymb composite. In Missouri and 
Oregon. 
6. A. asplenifolia. Pursh, known by ob- 
tuse segments. 
8, A. MiJLTiFLORA Hooker. Ptarmica Rich- 
ardson. Stem erect, leaves long lanceolate ser- 
rate pinnatif, segments serrulate, nearly smooth, 
corymb composite, rays very short. In North 
Canada. Is it the ptarmica of Newyork? 
