AsTERoiDE-E. COMPOSITiE. 95 



Tribe III. ASTEROIDE^. Less. 



Heads heterogamous or sometimes homogamous, rarely dioecious. 

 Style (in the perfect flowers) cylindraceous above ; the branches flat 

 or flattish, mostly linear or lanceolate, above equally pubescent exter- 

 nal'y ; the conspicuous stigmatic lines terminating where the exterior 

 pubescence commences, not confluent. — Leaves alternate, or rarely 

 opposite. 



CONSPECTUS OF THE SUBTRIBES. 



Subtribe 1. Asterine^. Heads heterogamous and radiate, or homogamous.. Re- 

 ceptacle seldom chaffy. Anthers not caudate. Leaves alternate. 



Div. 1. AsTERE.ffi;. Heads radiate, heterochromous (rays never yellow). 

 Div. 2. Chrysocome./e. Heads radiate, or homogamous, homochromous 

 (both the ray and disk yellow). 



Subtribe 2. Baccharide.s;. Heads dioecious or heterogamous, but never radiate; 

 the pistillate flowers tubular, slender or filiform, in several series. Receptacle 

 not chaffy. Anthers not caudate. 



Subtribe 3. Tarchonanthe.e. Heads dioecious or heterogamous, but never ra- 

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

 Anthers caudate. 



Subtribe 4. Inule^e. Heads heterogamous and radiate, or homogamous and dis- 

 coid, never dioecious. Receptacle not chaffy. Anthers caudate. Leaves 

 alternate. 



Subtribe 5. Eclypte.e. Heads heterogamous, radiate. Receptacle chaffy. An- 

 thers not caudate. Pappus toothed or awned, or none. Leaves opposite. 



Subtribe 1. Asterine^, DC. — Heads heterogamous and radiate, or ho- 

 mogamous, never dioecious. Receptacle seldom chaff}^ Anthers not cau- 

 date. Leaves almost always alternate. 



Div. 1. AsTERE^E, DC. — Heads heterogamous, radiate; the rays of 

 the cyanic .series (viz : white, purple, or blue, &c.) ; the disk-flowers yellow, 

 but frequently changing to purple in fading. Receptacle not chaffy, except 

 in a species of Corelhrogyne. 



CONSPECTUS OF THE GENERA. 



Subdiv. 1. EuasterejE. — Pappus of capillary or rarely subulate bristles. 



* Rays Tieutral or sterile. Pappus simple, capillary. 



22. Galateli.a. Appendages of the style triangular or deltoid-spatulate. Pap- 



pus of the ray and disk similar. 



23. CoRETHROGVNE. Appendages of the style densely penicillate. Pappus of 



the ray nearly or entirely wanting. 



♦ ♦ Rays fertile. Pappus of the ray and disk similar {except in Erigeron § Phalacro- 

 loma), simple or double ; the imier capillary. 



24. DiETERiA. Pappus simple, veiy unequal. Rays several or numerous, in a 



single series, hivolucre obovate, much imbricated. Root mostly bi- 

 ennial. Leaves usually pinnately toothed or pinnatifid. 



