2. Exacum. ] 73. GENTIANACE&. [3. Cahscoba. 



3. Exacura, L. 



Erect herbs with ovate or lanceolate 3-5-nerved leaves 

 and 4-5-merous bine or white flowers in terminal or axillary 

 cymes. Calyx-lobes often winged. Corolla rotate. Style 

 long, stigma small sub-capitate. Capsule globose, septicidal y 

 2-valved. Seeds very many, minute. 



Fls. bine, petals \-\''. Stem 1-1 ft. ... 1. tetragonum. 



Fls. blue, petals H''- Stem 3-12" L. If by f . . 2. pedunculatum. 

 Fls. white or very pale blue. Stem 3-12". L. 3 by If 3. petiolare, 



1. E. tetragonum, Roxb. Kuchuri, Beng. 



A lovely plant with 4-angled stems, sessile 5-nerved 

 leaves about 5" by 1|" and panicles of azure- blue flowers 

 with broadly-elliptic or ovate petals and erect large yellow 

 Jantbers. 



Grassy glades not uncommon. Singbhum, Banchi. Fls. Oct.-Dec. 



Boot given in fever, Wood. 

 The other species are small plants of damp places. 



3. Canscora, Lamk. 



Herbs with flowers in terminal dichotomous cymes. Calyx 

 of tell keeled or winged 4-toothed. Corolla more or less 

 irregular, St. 4 one larger perfect, three shorter smaller 

 barren or nearly suppressed. Capsule 2-valved. 



Calyx winged, Fls. white .1. decwsata. 



Calyx not winged, Fls. small rose -coloured. 



Cyme.branohes with small subulate bracts . . . 2. decurrens. 



Cyme branches with broadly-ovate foliaceous bracts . 8. diffusa. 



1. C. deCUSSata, Roem. Kalmeg, K, i Sankhahuli. H 

 Stem 4-20. inches high, 4-winged. L. 1-2" oblong - 



lanceolate. 



Common on clayev srround in the forest. Fls. Sept.-Nov- 

 Used as a tonio, laxative and in fever. 



2. C. decurrens, Dah., is a small plant <> -1 ft. high with 

 lanceolate leaves somewhat decurrent on the «*«m and small flower e, 



422 



