GentianacecE. 1 79 



puberulous, segm. lanceolate, acute ; cor.-tube ^ in., funnel- 

 shaped, slightly hairy in throat, lobes 5, lanceolate, shorter 

 than tube; berry \-\ in., nearly globose, blue. 



Montane zone, 4000-6000 ft., rare. Forests on Adam's Peak and adja- 

 cent parts of Maskeliya and Ambagamuwa. Fl. March ; white. 



Endemic. 



Though very distinct in its extreme narrow-leaved form, intermediates 

 are found between this and the last. Some of these, collected between 

 Madagama and Bogawantalawa in 1866, Thwaites considered 'certainly 

 hybrids.' 



LXXXVIL— GENTIANACE^. 



Herbs, rarely aquatic, 1. opp. (alt. in Lhmiantheinuni), entire, 

 fl. regular or slightly irregular, bisexual, usually in dichotomous 

 cymes ; cal. free, persistent, segm. 4-7 ; cor. rotate (rarely cam- 

 panulate or tubular), lobes 4-7 (two lower connate in Canscord), 

 contorted (valvate in Limnanthemiiin) ; stam. 4-7, inserted in 

 throat or tube of cor., opening by slits or pores; ov. superior, 

 l-celled (2-celled in Exacum), with numerous ovules, style 

 simple, stigmas 2 ; fruit a capsule (a berry in Crawfurdid) ; 

 seeds numerous, with copious endosperm. 



Terrestrial; 1. opp.; cor.-lobes contorted. 



Ov. 2-celled i. EXACUM. 



Ov. I -celled. 



Cor. irregular ; i perfect stam. 



Cor.-lobes slightly unequal . . .2. Hoppea. 

 Cor. with 2 lower lobes connate . . 3. Canscora. 

 Cor. regular; all stam. perfect. 

 Cor.-lobes 5, without glandular pits at 

 base. 

 Erect, fl. in axillary clusters . . 4. Enicostema. 

 Erect, fl. solitary, terminal . . .5. Gentiana. 

 Twining ; fruit a berry , . .6, Crawfordia. 

 Cor.-lobes 4, with glandular pits . . 7, Swertia. 

 Aquatic; 1. alt.; cor.-lobes valvate (Afivzj/a/z//^^^) 8. Limnanthemum. 



We have but nineteen species of this mainly temperate Order. They 

 are mostly found in the low country; Exacion pedunculahwi, Enicostema^ 

 and 2 species of Canscora being restricted to the dry region, and Hoppea 

 and two species of Limnanthe})ium to the wet country. The upper mon- 

 tane zone affords Exacwn Walkeri and E. macrantJium, Crawfurdia, and 

 the solitary species of Swertia and Getitiana. Szvertia and four species 

 oi Exacum are endemic. 



