224 ixxviii. COMPOSITE. (J. D. Hooker.) 



Tribe VI. AnthemidesB. Heads heterogamous, rayed or disciform, or 

 rayless and homogamous. Invol.-hracts 2- o=-seriate, dry or with scarioua tips. 

 Iteceptmie naked or paleaceous. Anther-celh not produced into tails. Style- 

 arms truncate. Pappus or a crown of short paleee. — leaves usually alternate. 

 Diskrfi. yellow, ray-fi. variously colom-ed. 



* Heceptacle pcdeaeeous. Heads usually rayed. 



Achenes margined. Heads corymbose 63. Achillea. 



Achenes 4-5-angled or many-ribbed.. Heads peduncled . . 64. Anthbmis. 



* Receptacle naked or with fimbriate pits. 



Heads rayed, shortly pednncled. Achenes 5-angled . . . .65. Allaedia. 

 Heads rayed, usually long-peduncled. Achenes 6-10-ribbed. 66. Chbtsanthbmum. 

 Heads rayed. Achenes rentrally 3-5-ribbed, dorsally oo-ribbed 



or plane 67. Matbioaeia. 



Heads disciform, peduncled. Invol.-braets l-2-»eriate . . .68. Cotula. 

 Heads disciform, subsessile. Invol.-bracts spreading in frt. . 69. Centipeda. 

 Heads disciform, subsessile, invoL-braots 3-4-seriate incurved 



in frt . 70. Spksbomobphea, 



Heads disciform, corymbose. Invol. bracts a>-seriate . . . 71. Tanacbtum. 

 Heads small, disciform, racemose or panicled 72. Aetemisia. 



Tkibb VII. Senecionideae. Heads heterogamous, rayed or disciform. 

 Invol.-bi-acts usually 1-seriate and subequal, with a few short outer at their 

 base, rarely oo -seriate. Ardher-cells obtuse below or with 2 short points raa-ely 

 tailed. Style-arms of ^ A. truncate or appendaged. Pappus of fine hairs. — 

 Leaves usually alternate. Dishfi. yellow, rays usually also yellow. 



Subtribe 1. TiJssrLAGlNE.a;. Invol.-bracts l-2-seria!te, subequal, free nearly 

 to the base. Style-arms of fl. § flattened or narrowly clavate, papillose, not 

 hairy all round (as in JEupatoriaceee or Inuloideee). 



Invol.-bracts l-seriate. Heads rayed, bracteolate, sblifary . 73. TtrssiLAOo. 

 Invol.-bracts 2- or few-seriate. Heads rayed, drooping, 



usually solitary 74. Cbemanthodidm. 



Subtribe 2. EusBKBCioifrDEa!. Invol.-bracts 1-2-seriate, free nearly to the 

 base, usually with a few smaller outer ones. Style-arms of 5 A- truncate or 

 obtuse, penicillate or with a hairy tip. 



* Invol.-bracts herbaceous, broad, acuminate. Heads large, rayed, long- 

 peduncled. 



Eeceptacle hemispheric. Herbs, leaves alternate .... 76. Doeonictjm. 



*• Invol. bracts narrow, with a fern much shorter outer ones (caiyculate), ex- 

 cept Emilia and some Senecios. 



Heads homogamoua. Style-tips long, hairy 76. Gtntjea. 



Heads homogamons, ebracteolate 77. Emilia. 



Heads homogamons. Style-tips ovate. Fleshy shrubs . . 78. Notonia. 

 Heads rayed or disciform, homogamons. Style-tips truncate 



or short or 0. Leaves radical or alternate 79. Senecio. 



Heads heterogamous. Fl. ? sterile. Glabrous undershrubs . 80. Othonnopsis. 



Subtribe 3. Othonne.*!. Invol.-bracts 1-seriate, united to above the middle 

 into a cup. Fl. § fertile ; style-arms truncate. 



Heads large, solitary, erect, sessile or peduncled. Alpine herbs 81. "Weeoteia. 



Teibb VIII. CalendulacesB. Heads rayed. Invol.-bracts I-2-seriate, 

 narrow, subequal. Receptacle naked. Anther-ceUs mucronate. Style-arms of 

 § fl. truncate, or in sterile, fl. undivided., Achenss usually large and thick and 

 de.'brmed, without pappus. . 



