244 xl vi. composite : cokyhbifeea:. [ Tancicetum. 
26. Tanacetijm Linn. Tansy. 
Achenes angled, crowned with a large epigynous disk and 
a membranous margin. Receptacle naked. Involucre hemi- 
spherical, imbricated. Ligulate florets short and trifid, or want- 
ing. (Heads homochromous .) — Name altered from Athanasia ; 
a, not, and Savaroc, death ; or that which does not quickly fade. 
1. T. vulgdre L. ( common T.) ; leaves bipinnatifid inciso- 
serrate. E. B. t. 1229. 
Borders of fields and road-sides. 2/.. 8. — Stem 1 — 3 ft. high. 
Flowers in a terminal corymb. — Whole plant hitter and aromatic, 
much used in medicine, and also in domestic economy. 
27. Artemisia Linn. Wormwood, Southernwood, Mugwort. 
Achenes obovate, with a minute epigynous disk. Pappus 0. 
Receptacle without scales. Involucre ovate or rounded, imbri- 
cated. Ligulate florets , if any, in a single row, short or slender 
and awl-shaped. (Heads homochromous .) — Named from Ar- 
temis, the Diana of the Greeks. 
* All the florets except those of the margin sterile. Receptacle glabrous. 
Heads monoecious. Oligosporus. 
1. A. campestris L. ( Field S.) ; leaves glabrous above silky 
beneath once or twice pinnate with linear segments, stems 
twiggy procumbent before flowering, scales of the involucre 
glabrous with a scarious margin. E. B. t. 338. 
Dry sandy heaths, rare. Norfolk and Suffolk, principally in the 
vicinity of Thetford and Bury. Belfast. If. 8,9. — Florets yellow : 
those of the disk, although apparently perfect, have no ovule in the 
germen, and therefore never produce seed, which is to be met with 
only in the single row of marginal pistillate filiform florets. 
** Heads heterogamous, florets not all perfect but all fertile. Receptacle 
glabrous. Abrotanum. 
2. A. vulgaris L. ( common M.) ; leaves pinnatifid white and 
woolly beneath, heads somewhat racemed ovate, scales of the 
involucre woolly. E. B. t. 978. 
Hedges and waste places, common. If.. 7 — 9. — Stems 3 — 4 ft. 
high, furrowed. Florets reddish or brownish yellow. 
*** Heads heterogamous. Receptacle hairy. Absinthium. 
3. A. Absinthium L. ( common TH); leaves bipinnatifid clothed 
with short silky down, segments lanceolate, heads hemispherical 
drooping many-flowered, outer scales of the involucre linear 
silky, inner ones roundish scarious. E. B. 1. 1230. 
Waste places and about villages, in dry soils. 2f. 8, 9. — Stem 
1 — 14 ft. high, erect. Panicles of flowers erect, leafy. Floral leaves 
