322 COMPOSITE. Veknonia. 



CONSPECTUS OF THE TRIBES. 



Suborder I. TUBII'LORiE. Corolla of the perfect flowers tubular, and regularly 5- (rarely 3 - 4-) toothed. 



Tribe I. Vebnoniaceje. Style of the perfect flowers cylindraccous ; the branches usually elongated and subulate, 



liispid throughout ; the stigmatic lines not extending beyond their middle. 

 Tribe II. Eupatoriace.e. Style of the perfect flowers cylindraccous ; the branches elongated, obtuse or clavatc, 



externally pubcrulcnt or papillose towards the summit ; the stigmatic lines obscure, terminating near their 



middle. 

 Tribe III. AsrzRoiDEiE. Style of the perfect flowers cylindraccous ; the branches linear, externally flattish, minutely 



and equally pubescent above ; the stigmatic lines prominent, extending to about the origin of the exterior 



pubescence. 

 Tribe IV. Senecio.\ide.e. Style of the perfect flowers cylindraccous ; the branches linear, truncate at the summit and 



pcncillate, 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. 

 Tribe V. CxNAREa:. Style of the perfect flowers thickened and nodose towards the summit, and often pencilled at the 



node ; the branches either concrete or distinct, pubenilcnt on the outside : the stigmatic lines reaching to 



and confluent at the summit of the branches. 



Suborder II. LIGULIFLOR.S. Flowers all perfect or ligulate. 

 Tribe VI. Cichobaces:. Style cylindraccous above; the branches rather long and obtuse, equally pubescent; the 

 stigmatic lines terminating below their middle. — Plants with milky juice. 



Suborder I. TUBIFLORtE. DC. 



Corolla of the pei'fect flowers tubular, and regularly 5- (rarely 4-) toothed or 

 lobed. Pollen globose, echinate, or (in Cynare^) rarely smooth and elliptical. 



Tribe I. VERNONIACEJE. Less. 

 Heads discoid, with the flowers all tubular and perfect (homogamous), or rarely radiate ; 

 the ray-floioers ligulate and pistillate. Corolla occasionally palmate, or obscurely 

 2-lipped. Style cylindrical above ; the branches subulate and elongated {rarely short 

 and obtuse), equally hispid ; the stigmatic lines terminating below or near the middle, 

 not confluent. 



1. VERNONIA. Schreb.gen. p. 541 ; Endl. gen. 220-i. iro.\-weed. 



[ Named after Mr. William Vernox, an English botanist, who many years ago travelled and collected plants in this 



country.] 



Heads several- or many-flowered, homogamous ; the flowers all equal and tubular. Involucre 



imbricate. Receptacle commonly naked. Corolla regular. Filaments smooth. Achenia 



mostly striate or ribbed, with a cartilaginous callus at the base. Pappus usually double ; 



the inner of numerous bristles ; the outer mostly short or minute, often somewhat chafiy. — 



Mostly perennial herbs, with usually alternate leaves ; in the North American species, 



corymbose-cymose. Flowers purple, rose-color or white. 



