Synopsis of Indian Composites. 307 



Sub-tribe. Flaverie^e. Capitula heterogamous, one or 

 few flowered, densely aggregated female flowers sometimes 

 solitary, sometimes in several series ; or homogamous, mixed 

 with former : achcenia bald : receptacle in the few flowered 

 capitula epaliate, in the many flowered ones, paleaceous. 



51. Enhydra, (Lour. D. C. 5-636). Capitula heteroga- 

 mous, all the flowers wrapped in a folded palea ; exterior ones 

 many series, female ; interior hermaphrodite sterile ; tube of 

 the ray florets filiform, of the disk subconical : limb of the ray 

 subligulate 3-4-cleft, of the disk 5-cleft : stigmas exserted 

 revolute, rough towards the apex : achsenia bald, erostrate, 

 altogether wrapped in the palea. Aquatic rooting opposite 

 leaved herbs, with axillary capitula : receptacle small flattish : 

 paleae as if 2-valved connivent : involucrum 4-leaved, two 

 opposite, larger : flowers white. 



Sub-tribe. Anthemide^e. Capitula usually heterogamous, 

 radiate or discoid : ligulae female or neuter i anthers ecaudate : 

 branches of the style truncated, bearded, very rarely sur- 

 mounted by a cone : achcenia angled, terete, or obcompressed 

 in the ray : pappus none or crown- like, rarely consisting of 

 squamellce or capillary hairs : leaves usually alternate. 



52. Matricaria, (Lin. D. C. 6-50). Capitula heteroga- 

 mous, ray ligulate 1- series female ; disk hermaphrodite 4-5- 

 toothed, tube terete : achsenia wingless, angled, surmounted 

 by a large epigynous disk, usually bald, rarely furnished with 

 a crown-like pappus. Annuals with much divided leaves ; 

 branches naked 1-cephalous: involucrum imbricated, several 

 series : receptacle large, naked ovato-conical : disk yellow, 

 ray white. 



53. Pyrethrum, (Gaertn. D. C. 6-53). Differs from the 

 preceding in the achsenia not being surmounted by an epi 

 gynous disk, but furnished with a crown-like, often toothed or 



