LXXXY. GE>"riANACE.i:. 187 



Ovary 1-celled. 



Corolla-lobes without pits, depressions, or glands at the 

 base. 



Corolla regular. 



Flower:; in sessile axillary clusters 2. Enicostemma. 



Flowers in dicbotomous cymes 3. Ekytiir.ea. 



Corolla iri-egular. 



Stigma scarcely lobed ; flowers yellow 4. Hoppea. 



Sligma deeply 2-lobed ; flowers pink or white. 5. CanscorA. 

 Corolla-lobes with 1 or 2 pits, depressions, or glands 



at the base 6. Swertia. 



Aquatic herbs; leaves alternate; corolla-lobes induplicate- 



valvate in bud 7 Limnantiiemum, 



1. EXACUM, Linn. 



Annual herbs. Leaves opposite, entire. Flowers in terminal and 

 axillary usually diehotomous cymes. Calyx deeply 4-5-lobed ; lobes 

 keeled, winged or Hat. Corolla blue, purple, or white ; tube short, 

 }2;lobose ; lobes 4-5, ovate or oblong. Stamens 4-5 on the corolla- 

 throat ; filaments short, dilated at the base; anthers dehiscing by ter- 

 minal pores at length extending into lateral slits. Ovary 2-celled ; 

 ovules many in each cell ; style long ; stigma capitate. Capsule globose, 

 septicidally 2-valved. Seeds many, minute, reticulate. — Distrib. Chiefly 

 Indian ; a few species Malayan, Chinese, and African ; species 20. 



Corolla-lobes 1 in. or more long 1. E. bicolor. 



Corolla-lobes less than ^ in long. 

 Calyx-lobes winged on the back. 



Pedicels stout, rigid ; corolla-lobes lanceolate, acute 2. E. pedunculatum. 



Pedicels filiform ; corolla-lobes suborbicular, obtuse 3. E. ptnniluiu. 



Calyx4obes not winged on the back 4. E. Lawii. 



1. Hxacum bicolor, Roxh. Hort, Beng. (1814) p. 83. Annual, 



erect, reaching 2ft. high; root fibrous; stem quadrangnlar, scarcely 

 branched. Leaves very variable in size and form, sessile, l|-5 by |-2 in., 

 ovate or elliptic or lanceolate, acute or obtuse, sometimes apiculate, 

 5-nerved, glabrous. Flowers showy, in copious terminal glabrous cymes; 

 pedicels ^-1 in. long ; bracts lanceolate, acute. Calyx g in. long, 

 glabrous, deeply 4-partite ; segments ovate, suddenly aristate-acuminate 

 and with membranous margins, the keel furnished with a large veined 

 wing which is more or less decurrent on the pedicel. Corolla reaching 

 1| in. long (when expanded 2 in. and more across) ; lobes reaching 1 in. 

 or more long, obliquely obovate, acute, the lower half white, the upper 

 blue. Anthers 5-^ in. long, curved. Style f-| in. long. Capsule 

 I in. long, ellipsoid, smooth and shining, tipped with the remains of the 

 style, yellowish-broAvn. El. B. I. v. 4, p. 96 ; Grrah. Cat. p. 123 ; Dalz. 

 &"Gibs. p. 156; Wight, Icon. t. 1321 ; AVoodr. in Jouru. Bomb. Nat. 

 v. 12 (1898) p. 168 ; Watt, Diet. Econ. Prod. v. 6, p. 306. Exacum 

 tttragonum, var. /3. bicolor, Bot. Mag. (1847) t. 4340. Sebcea carinata. 

 Grab. Cat. p. 124 {not of Spreng.). — Elowers : Aug.-Nov. Veijn. Udi- 

 cliirdyet. 



KoNKAN : pasture-lands between Panwel and Ivhandala, Graham; Salsette, Graham. 

 Deccan : hills, Woodrowl; Mawal (Poona districts), Woodrow I; Ivadkala, Cooke l; 

 Khandala, Graham; W'adgaon, Kaiiitkarl S. M. Country: Belgaum, Cooke , 

 li'dchie, 458! ; Castlerock, C'oy/iC ! — Distrib. India (W. Peninsula). 



