234 
COMPOSITE. (COMPOSITE FAMILY.) 
yellow. ( Av0€/u9, the ancient name, given in allusion to the pro¬ 
fusion of the flowers.) 
1. A. arvensis, L. (Corn Chamomile.) Pubescent; leaf¬ 
lets or divisions linear-lanceolate, toothed, very acute; branchlets 
leafless at the summit; scales of the involucre obtuse ; chaff lanceo¬ 
late, pointed, membranaceous; achenia crowned with a very short 
somewhat toothed margin. @ — Fields, N. England and New York, 
introduced, sparingly naturalized. — Resembles the May-weed, but 
has larger heads, and is not fetid. 
A. n6bilis, L., the officinal Chamomile, is said to be somewhat 
naturalized in Delaware. 
42. ACHILLEA, L. Yarrow. 
Heads many-flowered ; the rays few, fertile. Involucre imbri¬ 
cated. Receptacle chaffy, flattish. Achenia oblong, flattened, 
margined. Pappus none. — Perennial herbs, with small corym¬ 
bose heads. (So named because its virtues are said to have been 
discovered by Achilles.) 
** A# Millefolium, L. (Common Yarrow or Milfoil.) 
ems most y simple; leaves twice-pinnately parted ; the divisions lin¬ 
ear, s - o-cleft, crowded; corymb compound, flat-topped; involucre 
s ^ ort i white (or rose-color); receptacle small.— 
ic t s> an n Is, common. Aug. — Smooth or often woolly. 
2 A. Pturniica, L. (Sneezewort.) Leaves simple , lance- 
ate r/iear, sharply serrate with appressed teeth; corymb loose; 
l ^, J muc ^ longer than the bell-shaped involucre; receptacle 
roac , owers white. — Naturalized in some places, as in Danvers, 
Massachusetts. Aug. r 
43. LEUCASTIIEMrM, Tourn. Ox -eye Daisy. 
Heads many-flowered ; the rays numerous, fertile. Scales of 
road and flat involucre imbricated, with scarious margins. 
Receptacle flattish. Disk-corollas with a flattened tube. Ache¬ 
nia ot the disk and ray similar, striate, destitute of pappus. — R er ” 
ennial herbs, with toothed or pinnatiftd leaves, and large single 
s terminating the stem or branches. Rays white ; disk yel- 
_ W * ( i ame composed of Xcu/cor, white , and avOeuov, a flowery 
from the white rays.) 
Y^ 1 lS*«' re > Lam. (Ox-eye or White Daisy. White- 
I t .• i i m . erect ’ nearl y simple, naked above; root-leaves spatu- 
ate, petioled, the others partly clasping, all cut or pinnatifid-toothed; 
