136 BOTANY. 



Example : *Solidago. Division 4. Solenogynece. Example : Lepto- 

 thamnus. 



Sub-tribe 2. Baccharidece. Heads dioecious, or heterogamous, never 

 radiate ; pistillate flowers tubular, slender, or filiform, in several series. 

 Receptacle not chaffy. Anthers not caudate. Division 1. Conyzece. a, 

 Sphoeranthese. Example: Athroisma. 6, Grangeineae. Example: Grangea. 

 c, Euconyzeae. Example : *Conyza. d, Eubaccharideae. Example : 

 *Baccharis. 



Sub-tribe 3. TarchonanthecB. Heads dioecious, or heterogamous, never 

 radiate ; pistillate flowers, tubular and very slender, mostly in several series. 

 Anthers caudate. Division 1. Eutarchonanthece. Example : Tarchonan- 

 thus. Division 2. PlucheinecB. Example : *Pluchea, *Micropus. 



Sub-tribe 4. InulecB. Heads heterogamous and radiate, or homogamous 

 and discoid, never dioecious. Receptacle not chaff}'. Anthers caudate. 

 Leaves alternate. Division 1. Euinulece. Example : *Inula. Division 2. 

 CcBSulinecB. Example : Csesula. 



Sub-tribe 5. Bupthalmecs. Example : Bupthalmum. 



Sub-tribe 6. Eclt/ptece. Heads heterogamous, radiate. Receptacle 

 chaffy. Anthers not caudate. Pappus toothed, or awned, or none. Leaves 

 opposite. Examples : *Borrichia, *Eclipta. 



Tribe 4. Senecionidece. Style of the perfect flowers cylindraceous : the 

 branches linear, truncate at the summit, and penicillate, or often produced 

 into a conical or elongated hispid appendage ; the stigmatic lines rather 

 broad and prominent, extending to the commencement of the appendage or 

 hairy portion. 



Sub-tribe 1. Melampodinecs. Flowers all unisexual : the staminate and 

 pistillate either occupying the same or different heads, in the same or 

 different individuals. Anthers not caudate. Pappus never of bristles. 

 Division 1. Euxeniece. Example : Euxenia. Division 2. Milleriece. 

 Example : *Blennosperma. Division 3. SilpkiecB. Examples : *Silphium, 

 *Eno-elmannia. Division 4. Melampodiece. Example : *Melampodium. 

 Division 5. Ambrosiece. Examples : *Ambrosia, *Xanthium. Division 6. 

 IvecB. Example : *Iva. Division 7. Partlieniece. Example : *Parthe- 

 nium. 



Sub-tribe 2. Helianthece. Heads heterogamous and radiate, or homoga- 

 mous and discoid. Receptacle partly or entirely chaffy. Pappus none, or 

 coroniform, or awned, or of few squamellae. Anthers blackish, not caudate. 

 Leaves often opposite. Division 1. HeliopsidecB. Example: *Heliopsis. 

 Division 2. RudbeckiecB. Example : *Rudbeckia. Division 3. Coreop- 

 sidecB. Example : *Coreopsis. Division 4. BidentidecB. Example : 

 *Bidens. Division 5. Verbesinece. Example : *Spilanthes. 



Sub-tribe 3. FlaveriecB. Heads one-, few-flowered, densely aggregated, 

 heterogamous. Leaves opposite. Example : *Flaveria. 



Sub-tribe 4. TagetinecB. Heads heterogamous and radiate, or homoga- 

 mous and discoid. Receptacle not chaff}'. Pappus awned or setose. 

 [nvolucre, with the scales in a single series, and mostly united, dotted, like 

 the opposite leaves, with large pellucid glands. Division 1. Tagetece. 

 136 



