Tab. 4340. 
EXACUM TETRAGONUM ; y8. bicolor. 
Square-stalked Exacum; two-coloured var. 
Nat. Ord. Gentians.®.—Teteandeia Monogynia. 
Gen. Char. Calyx 4-5-partitu8, segmentis dorso carinatis v. alatis. Corolla 
rotata marcescens, tubo demuin globoso, limbo 5-partito. Siam. 4-5, corollae 
fauci inserta, suberecta. Antkerce immutatm, per apertiiram rimae poriformem 
apice dehiscentes. Ovarium valvis introflexis biloculare, ovulis suturse centrali 
utrinque affixis. Stylus distinctus, declinatus, deciduus, stigmate indiviso capi¬ 
tulate V. leviter transverse sulcato. Capsula bilocularis, bivalvis, septicida, pla- 
centis centralibus nunc secedentibus nunc in nnam coadunatis demum e valvis 
liberatis. Semina minutissima, placentis immersa.—Herbae plerumque annua, 
stricta, glaherrimce, cyma terminali, in India Orientali insulisque nonnuUis mans 
Indici indigence. Griseb. in DC. 
Exacum tetragonum\ caule tetragono subsimplici, foliis subamplexicaulibus 
ovato-oblongis acuminatis 5-nerviis margine laevibus, calycis adati 4-partiti 
segmentis aristato-acuminatis, corollae tubo brevi lobis ovato-lanceolatis 
subacuminatis. 
Exacum tetragonum. Roxb. FI. Ind. v. \ . p. 396. ed. Wall. v. \. p. 413. Wall. 
Ic. Plant. Rar. ». 3. t.27&. Wall. Cat. ». 4356. Griseb. Gen. et Sp. 
Gent. p. 107. et in De Cand. Prodr. v. 9. p. 44. 
Exacum HamUtonii. Don, Gard. Diet. v. 4.p. 213. 
|Q. roseum, Griseb.; foliis paulo angustioribus, coroUa rosea. Griseb. in DeCand. 
Prodr. 1. c. 
8. bicolor ; foliis fere ovatis, corollas segmentis albidis apice purpureis. 
Exacum bicolor. Roxb. FI. Did. v. 1. p. 397. ed. Wall. v. 1. p. 413. Griseb. in 
De Cand. Prodr. v. 9. p. 45. 
An East Indian plant, for the seeds of which we are indebted 
to J. E. Law, Esq., of Tanna, Bombay. He finds it growing 
profusely in the Concan among long grass. The seeds being 
sown in the autumn of 1846, produced flowering plants in the 
stove of the Royal Gardens in June, 1847. The blossoms are 
highly ornamental; but as the plant is annual it may prove 
difficult in some seasons to ripen the seed. That it is the species 
called Exacum bicolor by Roxburgh, I can hardly doubt, and 
Mr. Law agrees with me in considering it to be so; but 1 am 
equally disposed to believe that the E. bicolor is only a var. of 
DECEMBEE IST, 1847- 
