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PYRETHRUM DIVERSIFOLIUM. 
Hairy New Holland Pyrethrum. 
SYNGENESIA POLYGAMIA SUPERFLUA.—Nat. Ord. COMPOSITJE. 
Gen. Char. — Receptaculum nudum. Achenia margine membranacea coro- 
nata (rarissime breviter papposa). Involucrum liemisphaericum, folioHs 
acutiusculis irabricatis, margine membranaceis Sm. 
Pyrethrum diver sifoUum ; caule subramoso pilis articulatis hirsute, fo- 
liis pinnatifidis incisis petiolo dilatato, superioribus subintegris, ache- 
niis margine brevi papposo. 
Pyrethrum diversifolium, Graham, MSS. 
Root annual. Stem about a foot high, clothed, except at the extremity, with 
scattered, white, beautifully jointed hairs, rarely tipped with a small 
gland ; scarcely branched. Leaves 2-3 inches long, pinnatifid, the seg- 
ments lanceolate, entire or incised, glabrous, the petioles about as long 
as the leaf, in the lower leaves scarcely dilated, the rest remarkably so, 
upper ones nearly entire, all of them hairy, especially at the margin, 
with the hairs jointed. 
Flowers terminal, solitary. Calt/x shortly hemispherical, imbricated with 
greenish, oblong, scarcely concave scales, white, membranous at the 
margin, fringed at the extremity with minute glandular hairs. Disk 
yellow. Ray white. Receptacle naked, at length, very convex, dotted. 
Germens and young Achenia obovato-oblong, oblique, crowned with a 
short, simple, marginal pappus of hairs. 
This has altogether the habit of a Chrysanthemum or Py- 
rethrum, approaching nearer to the character of the latter in 
having a crown to the achenia or seeds ; but then this crown 
is a short hairy pappus, which may perhaps be considered of 
sufficient importance to cause it to be removed, although such 
a removal would undoubtedly be contrary to nature. 
The broad and dilated petiole, and the very distinctly joint- 
voL. in. 
