Exacum. | XIETRANDRIA MONOGYNIAs A13 
EXACUM. Schreb. Gen N. 185. 
. Calyx four-leaved. — Corol salver-shaped. Capsule superior, 
two-celled, two-valved. Seeds many. 
1. E. bicolor, R. ; 
Annual, erect, four-sided. Leaves sessile, ovate, five-nerved. 
Flowers axillary, apices of the segments of the coroi blue, the rest 
white. Anthers erect. 
‘A native of Cuttack, where it appears during the cool season. 
Root almost simple.—Stem erect, brauchy, four-sided; angles 
somewhat winged, from one to two feet high.— Leaves sub-sessile, 
opposite, oval, five-nerved, smooth, size very various. ZToral leaves 
small and narrow.—-£owers axillary, solitary, short peduncled, large, 
of a beautiful white and biue colour. 
9. E. tetragonum, R. 
Annual, simple, erect, four-sided. Leaves sessile, lanceolate, five- 
neryed. Flowers numerous, terminal. Stamens and style declinate. 
Beng. Koochurz. 
A native of Bengal, where it grows among long grass ; and flow- 
ers during the rains. : 
Stem erect, simple, exactly four-sided, smooth ; from two to 
three or even four feet high.— Leaves opposite, decussate, sessile, 
lanceolate, five-nerved, smooth and shining, from two to four inches 
long.— Flowers terminal, numerous, large, of a most beautiful blue 
colour, nodorous.— Calyx divided nearly to the base into four, dagger- 
ed segments.— Coro/ ; segments oblong, acute, spreading.— Filaments 
on the tube of the corel, short. Anthers linear, bending to one side, 
with two pores at the top, for the discharge of the pollen, as in Cas- 
sia.— Germ oval. Style projecting obliquely with the stamina ; stig- 
ma enlarged.— Capsule two- celled, two-valved.— Seeds numerous. - 
Obs. This is one of the most elegant plants Ihave met with, the 
flowers being not only numerous, large, and beautiful, but retaining 
heir beauty and expansion for many days, which is a rare circum- 
stance in an Indian plant. 
