Exacum. tetrandria monogynia. 399 



sides, three-nerved, from one to three inches long. Racemes 

 terminal, and opposite from the exterior axills, the whole form- 

 ing an expanded corymbiforin panicle. Peduncles and pedicels 

 four-sided, smooth. Flowers numerous, large, of a violet co- 

 lour. Calyx five-cleft ; divisions with a broad membranace- 

 ous wing*, on the back, and a long subulate point. Corol ; 

 lube gibbous, length of the calyx, some short filaments 

 amongst the insertions of the stamina crown the mouth of the 

 tube. Border of five, obovate, beautiful, violet-coloured di- 

 visions. Filuments on the mouth of the tube, erect. Anthers 

 linear, with two pores at the top, and also opening on the 

 sides, ^tyle declining, rather longer than the filaments. Stig- 

 ma headed. Capsule oblong, two-celled. 



Obs. The anthers remain straight, and hard, with two 

 pores at the top, and also bursting by two longitudinal open- 

 ings on the sides, I have for that reason removed this plant 

 from the genus Chironia, the essential mark of which consists 

 in its spiral anthers. 



4. E. carinalum. R. 



Annual, erect. Leaves sub-sessile, lanceolate, three-nerved. 

 Corols four-cleft. Calyces broad, membranaceo-carinated. 

 Sta7nens protruded. Style declined. 



A native of Ceylon. 



Root ramous, annual. Stem erect, with one or two oppo- 

 site pairs of branches about the middle ; above these dichoto- 

 mous, somewhat four-sided, smooth, from six to twelve inches 

 high. Leaves opposite, short-petioled, lanceolate, entire, three- 

 nerved. Flowers terminal, numerous, pretty large, yellow, 

 collected on dichotomous corymbs, with a long peduncled 

 one in each of the divisions. Calyx four-parted, each division 

 augumented by a broad membranaceous keel on the back. 

 Corol four- parted. Filaments short, inserted on a membra- 

 naceous rim round the inside of the mouth of the tube. An- 

 thers erect, yellow, opening on the sides. Style longer than 

 the stamens, declined. Stigma ascending, simple. 



