Nineteenth class. 
41 
61. Anthers with 2 filiform appendages at the base. Ray fls 
yellow. Ls undivided . . . Buphthalmum. 302. 
— Anthers without appendages. Ray fls gen. white. Ls gen. 
1—2 pinnatisect . ** . . . . . . 02 
62. Ligule of ray fls broad, rounded. Heads small, in a dense 
corymb.Achillea. 313. 
— Ligule of ray fls long. Heads larger, in a loose corymb 
Anthemis. 314. 
63 (56). Pappus C, or only a prominent rim . . 04, 
— Pappus hair-like . . . . . . 07 
64. Disk fls hermaphrodite, barren; ray fls fertile; fls all 
yellow.Calendula. 321. 
— Ray and disk fls fertile, ray fls white . . . 05 
65. Invol. bracts in 2 rows. Stem leafless, only bearing 
1 head.Beilis. 294. 
— Invol. bracts imbricate. Stem leafy . . . 00 
66. Fr. with 3—5 ribs on the inner face. Ls 2—3-pinnati- 
partite.Matricaria. 315. 
Fr. equally ribbed all round . Leucanthemum. 316. 
67 (63). Invol. bracts in 1 or 2 rows, equal in length or the 
outer ones forming an outer invol. . . . 08 
— Invol. bracts in several rows, imbricate. (Stem leafy) 74 
68. Pappus of the ray fr. simple, that of the disk double 
Stenactis. 295. 
— Pappus all alike, of the ray fr. sometimes 0 . 00 
69. Ray fls white.Bellidiastrum. 293. 
— Ray fls yellow ... . . . . 70 
70. Fem. fls in several rows. Stem bearing only 1 head, 
scaly ..Tussilago. 289. 
— Fem. fls in 1 row. Stem leafy, with 1 — several heads 71 
71. Caul, ls opposite.Arnica. 319. 
— Caul, ls alternate ....... 72 
72. Invol. cylindric or conic . . . Senecio. 320. 
— Invol. hemispheric, or fairly flat. (Ls undiv.) . 73 
73. Ray fr. without pappus .... Doronicum. 317. 
— All the fr. with pappus .... Aronicum. 318. 
74 (67). Fls of ray and disk of the same colour (yellow) 75 
— Ray fls of a different colour ..... 77 
75. Anthers without appendages. Ray fls 5—8 Solidago. 297. 
— Anthers with appendages. Ray fls gen. numerous 70 
76. Pappus double, that of the circumference short, like a 
crown.Pulicaria. 301. 
— Pappus simple, a single row of hairs . Inula. 299. 
77 (74). Ray fls very narrow, in several rows Erigeron. 296. 
— Ray fls broader, in a single row . . Aster. 292. 
