240 | THE COMPOSITE FAMILY, 
2, A. Millefolium, Linn. (fig. 553). Milfoil or Yurrow.—Stock 
perennial, creeping undergound, with numerous short, leafy barren 
branches, and erect, almost simple flowering stems, about a foot high. 
Leaves oblong, or linear in their outline, but finely cut into numerous — 
short, but very narrow and deeply pinnatifid segments. Flower-heads 
numerous, small, ovoid, in a dense terminal corymb. Florets of the 
ray seldom above 5 or 6 in each head, white or pink. 
In pastures, meadows, waste places, &c., very abundant in EHurope 
and Russian Asia from the Mediterranean to the Arctic Circle, and 
extends over a great part of North America. It is also one of the 
commonest of British plants. Fl. the whole summer. It varies with the 
foliage nearly glabrous, or densely covered with white woolly hairs. 
XVI. DIOTIS. DIOTIS. 
A single, very cottony species, distinguished from Achillea by the 
florets, all tubular, with two projecting ears at the base of the corolla, 
which enclose the achene and remain upon it after the upper part 
falls off. 
1. D. maritima, Cass. (fig. 534). S. Cotton Weed.—Rootstock per- 
ennial and creeping; the stems branching at the base, hard and almost — 
woody, seldom a foot high, covered, as well as the leaves and involucres, 
with a dense, white, cottony wool. Leaves alternate, oblong, entire or 
slightly toothed, about half an inch long. Flower-heads nearly globular, 
about 4 lines diameter, in dense terminal corymbs. Florets yellow and 
small. Receptacle convex with scales between the florets. Achenes 
without pappus or border except the persistent base of the floret. 
In maritime sands on the Mediterranean and Atlantic. Extends on 
the English coasts up to Anglesea on one side and Suffolk on the other ; 
it is found also on the south coasts of Ireland, and the Channel Islands, 
Fl. end of summer or autumn. 
XVII. TANACETUM. TANSY. . 
Herbs, with much divided, alternate leaves. Flower-heads hemi- 
spherical, in terminal corymbs. Involucral bracts imbricated, scarious 
at the edges. Receptacle without scales. Florets yellow, all tubular, 
or the outer ones ligulate but not longer than the others... Achenes 
angular, with a flat top, without any pappus. 
A small genus from the Mediterranean and Caucasian regions, differ- 
ing from Artemisia technically in the shape of the achene, but more 
evidently in the larger, more yellow, corymbose, not paniculate, flower- 
heads. | 
1, T. vulgare, Linn. (fig. 535). Common T.—A stout, erect per- 
ennial, 2 to 3 feet high, glabrous or slightly downy, with a strong scent 
and bitter savour. Rootstock creeping. Leaves rather large, pinnate, 
with oblong-linear, pinnatifid or toothed segments. Flower-heads 
numerous, hemispherical, about 4 lines diameter, of a golden yellow, 
in a large terminal corymb. 
On the edges of fields, roadsides, and waste places, in Europe and 
Russian Asia, from the Mediterranean to the Arctic Circle. Extends 
all over Britain, perhaps always where introduced. Fl. end of swmmer, _ 
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