96 xcvii. GENTIANACE.E. (C. B. Clarke.) [Exacum. 



W. DECCAN PENINSULA ; from the Conean southwards. 



Stem 2-5 ft., subsimple below. Leaves 2-5 in., from oblong to subcordate-ovate. 

 Cymes dense, forming a narrow interrupted panicle. Calyx-lobes f-1 in., narrowly 

 (or not) winged. Corolla-lobes l\ in., ovate, acute. Anthers ^- in. wide at the 

 base. Capsule ^ in., ovoid. The finest species of the genus : in its straight buds and 

 subsymmetric flowers it resembles A. tetragonum on a large scale. 



4. E. bicolor, Roxb. Catal. PL (1813), and Fl. Ind. ed. Carey $ Wall 

 i. 413 ; stem quadrangular, leaves sessile ovate-lanceolate 5-nerved, calyx-lobes 

 ovate suddenly caudate, keel winged, anthers ^-| in. curved. Wight Ic. t. 

 1321 ; Griseb. in DC. Prodr. ix. 45 ; Dalz. $ Gibs. Bomb. FL 156 (syn. excl.} ; 

 Clarke in Journ. Linn. Soc. xiv. 425. E. grandiflorum, Wall. Cat. 4358 ; 

 Griseb. in DC. Prodr. ix. 47. E. Metzianum, Herb. Hohenacker, n. 857. E. 

 sulcatum, Herb. Wight, not of Roxb. E. tetragonum, . tricolor, Bot. Mag. 

 t. 4340. 



PENINSULA, frequent from the Conean and Orissa to Courtallum. 

 Considered by Mr. Bentham only a form of E. tetragonum, but differs from that 

 (and the larger E. Perrottetii) in the unsymmetric flowers, the buds distinctly curved 

 at the tips, and the anther-cells curved and tapering upwards. The calyx-lobes do 

 not taper gradually as in E. Perrottetii. The flowers are larger than those of E. 

 tetragonum, smaller than those of E. Perrottetii. The corolla-segments are (very 

 generally) white in the lower half, full azure-blue in the upper. 



5. E. axillare, Thwaites Enum. 203 ; stem quadrangular, leaves ovate- 

 lanceolate 3-nerved thin succulent, flowers mostly solitary on axillary peduncles, 

 calyx-lobes with a dorsal cordate-lanceolate reticulated wing, anthers \ in. 

 straight shortly suddenly beaked. 



CEYLON; in the Pasdoon Corle, Walker, Thwaites. 



Stem 6-18 in., procumbent and branched or erect and simple. Leaves 2 by 1 in, 

 base tapering, lower mostly long-petioled, very thin, dried reticulately nerved. 

 Peduncles J-f in., numerous, often from the lower axils; upper imperfectly corymbed. 

 Calyx-lobes ^ in. ; wing (in young fruit) ~ in. broad. Corolla-lobe ^ in., lanceolate, 

 acute, cyaneous ( Thwaites}. Capsule 5 by f in. 



VAR. pentamera ; corolla-lobes 5 broader shorter obtuser than in E. axillare type. 

 Ceylon, Thwaites. A dubious plant, perhaps more nearly allied to E. Walkeri, but 

 in the thin succulent leaves and cordate calyx-wings altogether resembling E. axillare. 



** Corolla large or medium-sized, lobes 5 (all from the Deccan Peninsula 

 or Ceylon). 



6. E. Walkeri, Am. in Ann. Sc. Nat. 2, xi. 176 ; leaves ovate or lan- 

 ceolate acute 3-nerved, peduncles axillary solitary and terminal subcorymbose, 

 calyx-lobes with an ovate-lanceolate dorsal wing, corolla-lobes in. broadly 

 elliptic, anthers -| in. subtruncate. Griseb. Gentian. 110, and in DC. Prodr. 

 ix. 45; Wight III. t. 157,6. fig. 1. E. ovale, Griseb. Gentian. Ill, and in 

 DC. Prodr. ix. 46 ; Clarke in Journ. Linn. Soc. xi. 426. E. foliosum, Griseb. 

 in DC. Prodr. ix. 45. E. zeylanicum, var. ft only, Thwaites Enum. 203. 



CEYLON ; Walker, &c. ; central province, alt. 5000 ft., Thwaites (C.P. n. 38). 



Stems 1-3 ft., suberect, often with long branches from near the base, quadran- 

 gular or obscurely 4-lineolate. Leaves (in the original E. ovale} 1 by f in. ovate, 

 acute, base rounded, subsessile (in Thwaites E. zeylanicum, var. /3), 2f by f in., lan- 

 ceolate, acuminate at both ends. Calyx-lobes | in., base of wing narrowed or rounded, 

 rarely cordate. Corolla-lobes acute, white or pale blue. Capsule %-% by ~ in. E. 

 ovale of Griseb. has been reduced by Thwaites to E. macranthum, but the corolla- 

 lobes are described by Grisebach as 8 mill, long, and it was doubtless = E. Walkeri, 

 as i.s E. ovale of Wight's and Gardner's Herbarium. In this species 1 -flowered 

 peduncles from the lower axils are frequent. 



