COMPOSITE. 
151 
rows, outermost ones intermixed with the inner scales of the 
involucre or paleie ; central florets lew, herm., tubular. 
Pappus capillary. Receptacle conical, scaly at the margin. 
Involucre subconical, imbricated, scales lanceolate longer 
than the florets. 
(i5.) 22. Antbnnaria. Heads subdicecious. Male florets 
tubular, style almost simple, pappus clavate. Fem. florets 
filiform, pappus capillary. Receptacle convex. Involucre 
hemispherical, imbricated, scales coloured at the end. 
** Pappus 0, membranous, or of 2 — 3 bristles. 
■f Receptacle without scales. Heads heterogamous, radiant. 
Fl. of the ray fem., ligulate, in 1 row ; of the disk herm., 
tubular. 
(16.) 6. Bellis. Involucre of 2 rows of equal obtuse scales. 
Receptacle conical. Fr. compressed. Pappus 0. 
(17.) 15. Chrysanthemum. Involucre hemispherical. Re- 
ceptacle plane or convex. Fr. terete, without wings, or 
slightly angular and somewhat winged. Pappus 0 or of 3 
minute teeth. 
(18.) 16. Pyrethrum. Involucre hemispherical. Recepta- 
cle plane or convex. Fr. angular, not winged. Pappus an 
elevated membranous border. — It is probable that this genus 
ought to be combined with the preceding. 
(19-) 17. Matricaria. Involucre nearly flat. Receptacle 
elongate-conical. Fr. angular, not winged. Pappus 0, or 
a slight membranous border. 
ft Receptacle scaly. Pappus 0. 
(20.) 12. Anthemis. Heads heterogamous, radiant. Florets 
of the ray fem., or neuter, ligulate, in 1 row ; of the disk 
herm., tubular. Receptacle convex or conical. Involucre 
imbricated, of few rows. Fr. terete, or obtusely tetragonal, 
without pappus, but with a more or less prominent margin. 
(21.) 13. Achillea. Heads heterogamous, radiant. Florets 
of the ray fem., ligulate, short ; of the disk herm., tubular : 
tube piano-compressed 1-winged. Receptacle narrow, slightly 
elevated. Involucre ovate or oblong, imbricated. Fr. com- 
pressed, without pappus. 
(22.) 14. Diotis. Heads homogamous, discoidal. Florets 
herm., tubular : tube compressed with 2 auricles at the base. 
Receptacle convex, w T ith concave downy-topped scales. In- 
volucre bellshaped, imbricated. Fr. compressed, crowned 
with the persistent anricled tube of the cor., pappus 0. 
