170 S. Kurz — Contributions towards a [No. 2, 



Gynura. Flower-heads homogamous. Style-branches terminating in an elongate 

 shortly hairy subulate appendage. Eest as in Senecio. Herbs, often tuberous-rooted. 



Emilia. Flower-heads homogamous. Style-branches terminating in a short or 

 rather long appendage. Rest as in Senecio. Herbs. 



NoTONiA. Flower-heads homogamous. Style-branches of hermaphrodites termi- 

 nating VD. an ovate appendage. Rest as in Senecio. Fleshy glaucous herbs. 



Senecio. Flower-heads radiate or homogamous. Involucre wide or narrow, the 

 bracts narrow, equal, blunt or shortly pointed, the outer ones small or wanting, or 

 rarely gradually longer from below. Style-branches truncate or obtuse, or rarely 

 shortly appendaged. Achenes o — 10-ribbed. Herbs or rarely shrubs, the leaves alter- 

 nate or radical. 



* * JFloiver-heads Jiomogamous, all the florets regiilarly tubular., 

 never yellow (usually purple, violet, or white). 



Subtrih. 8, ETIPATORIACEM. Anther-base nearly entire. Style-branches 

 almost terete or very elongate-club-shaped, obtuse, only minutely papillose. Leaves 

 opposite or alternate. 



* Anthers appendaged at the tip. Achenes h-ribbed (Ageratese). 



X Bristles of pappus copious, smooth or minutely hairy. 

 EuPATomuM. Involucre-bracts in several, rarely in 2 — 3 rows, somewhat unequal, 

 always more than 5. Flower -heads usually many (rarely 1 — 4) flowered, corymbose 

 or panicled. 



MiKANiA. Involucre-bracts 4 only, somewhat unequal. Flower-heads 4-flowered, 

 racemose or panicled. Twining shrubs. 



X X Pappus entirely or partially chaffy or awned, or consisting of 5 — 10 

 rigid bristles, or minute and coronate, or none. 

 Ageratum. Involucre-bracts in 2 — 3 rows, somewhat unequal. Pappus of 5 

 short scales or long awns free or united into a shagged crown, or of 10 — 20 stiff bristles 

 chaffy or dilated at the base. Herbs. 



* * Anthers truncate at the top and not appendaged. Achenes o-ribbed. 

 Adenostemma. Involucre-bracts numerous, almost in 2 rows, somewhat unequal. 



Pappus of 3 — 5 short stiff spreading bristles usually gland-tipped. Herbs. 



Subtrih. 9. VERNONIACEM. Anther-base sagittate. Style -branches subu- 

 late, shortly hairy all over. Leaves usually alternate. 



* Flower-heads small, sessile, usually 1- or few-flowered, packed into a head-like 



cluster. (Lychnophorese). 

 Elephantopus. Florets slightly irregular, by 2 — 5 in a head. Involucre-bracts 

 usually 8, in 2 rows. Bristles or scales of pappus rigid, in 1 or 2 rows. Flower-heads 

 clustered, the clusters leafy -involucred. Herbs. 



* * Flower-heads separate, usually peduncled and in more or less lax inflorescences. 



(Vernonieae). 

 X Pappus nojie or more usually composed of a few very caducous bristles. 

 Ethulia. Involucre bell-shaped, not leafy. Flower-heads small, corymbose. 

 Achenes 4 — 5-cornered, broadly truncate at the top. Pappus none. Herbs. 



Centratherum. Involucre wide, the outer bracts leafy or rarely only shortly 

 Icafy-appendaged. Flower-heads corymbose or solitary. Pappus of a few or numer- 

 ous bristles. Herbs. 



X X Pappus more or less persistent, composed of numerous capillary 

 bristles in 2 — 3 rows, those of the outer row sometimes very short or 

 reduced to scalelets. 



