Synopsis of Indian Composite. 295 



double, the exterior short, interior like the pappus of the 

 ray. Erect herbs with alternate leaves : capitula solitary on 

 the apices of the branches : scales of the involucrum 2-3- 

 series : receptacle naked, plain or convex : ray florets white, or 

 pale-purple ; disk yellow. 



15. Asterom^ea, (Blume, D. C. 5-302). Capitula many 

 flowered : ray 1 -series female ligulate ; disk hermaphrodite : 

 stigmas of the disk lanceolate : achaenia 4-ribbed, somewhat 

 compressed, attenuated at the base, somewhat glandulose, 

 hairy : pappus 1 -series, united at the base, setaceously cleft 

 at the apex. Erect glabrous herbs, with alternate leaves : 

 capitula solitary on the apices of the branches, involucrum 

 2-series : scales herbaceous at the apex : ligulae blue or white ; 

 disk yellow. 



16. Myriactis, (Less D.C. 5-308). Capitula heterogamous: 

 flowers of the ray 2 or many series female ; ligula very narrow ; 

 of the disk hermaphrodite : achaenia compressed, beakless, 

 often glanduliferous at the apex : pappus none. Erect dicho- 

 tomously ramous herbs with alternate leaves : peduncles long, 

 1 cephalous, paniculate : capitula globose : involucrum 1-2 

 series : receptacle naked : florets white or yellow. 



17. Psiadia, (Jacq. D. C. 5-318). Capitula heterogamous, 

 at first sight discoid, though truly radiate, ray florets several 

 series very short ; disk hermaphrodite or male by abortion, 

 5-toothed : achaenia of the ray oblong, glabrous, beakless : pap- 

 pus uniform 1-series. Shrubs with alternate petioled leaves 

 and corymbose inflorescence : involucrum several series, im- 

 bricated : receptacle subalveolate. 



18. Microglossa, (D. C. 5-320). Differs from the pre- 

 ceding in the disk florets which are 3-5-cleft, male. Suf- 

 fruticose erect or somewhat voluble : leaves alternate : in- 



2 Q 



