BOTANY. 137 



Examples : *Dysodia, *Riddellia. Division 2. Poi^ophyllece. Example : 

 Porophyllum. 



Sub-tribe 5. HeleniecB. Heads mostly hetei'ogamous. Pappus of several 

 or numerous scarious, chaffy scales, in a single series, distinct, rarely none. 

 Leaves mostly alternate (chiefly American). Division 1. Gaillardiece. a, 

 Eugaillardieae. Example : *Gaillardia. h, Euhelenieae. Example : 

 *Hymenopappus. Division 2. GalinsogecB. a, Eugalinsogeac. Example : 

 *Marshallia. b, Sphenogyneae. Example : Ursinia. Division 3. Madie<x. 

 Example : *Callichroa. Division 4. Baldwiniece. Example : *Actino- 

 spermum. 



Sub-tribe 6. AnthemidecB. Heads mostly heterogamous. Pappus none 

 or coroniform, rarely squamellate. Anthers not caudate. Branches of the 

 style truncate and bearded at the apex, rarely terminated by a short cone. 

 Leaves mostly alternate. Division L EuanthemidecB. Examples : 

 *Anthemis, *Achillea. Division 2. Chrysanthemece. Example : *Monolopia. 

 Division 3. Cotulece. Example: *'Aromia. Division 4. AthanasiecB. 

 Example: Athanasia. Division b. Ai'temisiece. Examples: *Tanacetum, 

 *Artemisia. Division 6. Hippiece. Example : *Soliva. Division 7. 

 EriocephalecB. Example : Eriocephalus. 



Sub-tribe 7. Gnaphaliecn. Heads homogamous and discoid, rarely 

 heterogamous. Anthers caudate. Pappus of capillary or setaceous bristles, 

 rarely none. Leaves mostly alternate. Division 1. Angianthece. Example: 

 Hyalolepis. Division 2. Cassiniece. Example : Cassinia. Division 3. 

 Helichrysece. Examples ; *Gnaphalium, *Filago. Division 4. Seriphiece. 

 Example : Seriphium. Division 5. Antennariece. Example : *Antennaria. 

 Division 6. Leyserrece. Example: Athrixia. Division 7. Relhaniece. 

 Example : Carpesium. 



Sub-tribe 8. SenecionecB. Heads homogamous or heterogamous, discoid 

 or radiate. Anthers not caudate. Pappus of capillary bristles, or very 

 rarely wanting in the exterior flowers. Leaves alternate. Division \. 

 NeurolcenecB. Example : Neurolaena. Division 2. Erechtitece. Example : 

 *Erechtites. Division 3. EusenecionecB. Example : *Cacalia, *Senecio. 

 Division 4. Balbisiece. Example : Balbisia. 



Tribe 5. CynarecB. Style of the perfect flowers nodose-thickened, and 

 often penicillate at the summit ; the stigmatic lines not prominent, reaching 

 to and confluent at the summit of the externally puberulent branches. 



Sub-tribe \. Calendulacece (none North American). Division!. Calendulece. 

 Example : Calendula. Division 2. Osteospermece. Example : Osteospermum. 

 Division 3. OthonnecB. Examples : Heteractis. 



Sub-tribe 2. ArctotidecB (none North American). Division I. ArctotecB. 

 Example : Arctotis. Division 2. Gorteriece. Example : CuUumia. 



Sub-tribe 3. EchinopsidecB (none North American). Example ^ 

 Acantholepis. 



Sub-tribe 4:. Carc?opa^e«E (none North American). Example: Cardopatium. 



Sub-tribe 5. XeranthemecB (none North American). Example ' 

 Chardinia. 



187 



