94 xcTii. GENTUNACB^. (C. B. Clarke.) lOotylanthera. 



■below ; anthers oblong. Disc of 5 glands at the base of the ovary or 0. Ovary 

 superior, 1-celled, or rarely only the placentae intruded and meeting ; style short 

 or linear, simple, stigmas 2 small ; OYules numerous. Capsule membranous, 

 rarely fleshy and berried. Seeds numerous, small, sometimes winged ; albumen 

 copious. — Species 620, throughout the globe, more abundant in mountainous 

 regions. 



Tetbe I. Exaceee. Leaves opposite. Corolla-lobes twisted to the right. 

 Ovary completely 2-celled. Style filiform. 



Leafless parasites, anthers dehiscing by terminal pores . .1. Cotylanthera. 



Corolla blue, purplish or white 2. ExAcuit. 



CoroUa yellow, anthers dehiscing by longitudinal slits ... 3. Sbb^a. 



Tribe II. Cbironiese. Leaves opposite. Corolla-lobes twisted to the 

 right. Ovary l-ceUed. Style filiform. 



Elowers regular in axillary clusters S. Enicostema. 



Flowers regular panided or terminal subcapitate 6. Eetthb^a. 



Flower irregular, stigma scarcely divided, minute herbs ... 4. Hoppea. 

 Flower irregular, stigmas 2 7. Canscoea. 



Tribe III. Swertieae. Leaves opposite, rarely alternate. Corolla-lobes 

 twisted or imbricate. Ovary l-ceUed; Style short, rarely elongate. 



* CoroUa witJiout pits or depressions near the base of its lobes (viscid spots or 

 hairy glands sometimes present). 



Twiners, corolla tubular-campanulate . . 8. Cbawftiedia. 



Corolla tubular-campanulate, stamens attached on the tube. . 9. Gbntiana. ■ 

 Corolla tubular-campanulate, stamens attached between its 



lobes 10. Jaeschkba. 



Corolla rotate, stamens attached at its base 11. Pleueooyne. 



** Corolla with 1 or 2 depressions pits or spurs near the base of each of its 

 lobes. • 



Depressions or pits of the corolla shallow 12. Swebtia. 



Pits of the corolla prolonged into spurs 13. Halenia.. 



Tribe IV. MenyantbeaB. Aquatic herbs, leaves radical or alternate. 

 Corolla-lobes induplicate-valvate in the bud. 



Leaves 3-foliolate 14. Menyanthbs. 



Leaves simple, cauline deeply cordate 15. Limnanthemum. 



1. COTYIiAMTKEXtA, Blume. 



Parasitic, small, glabrous herbs. Leaves scale-like, opposite. Flowers 

 solitary or few, terminal. Calyx deeply 4-lobed. Corolla rotate ; lobes 4, 

 oblong. Stamens 4, on the coroUa-tube, filaments linear ; anther-cells oblong, 

 slightly curved, dehiscing by 1-2 terminal pores. Ovary completely 2-celled ; 

 placentae large ; style filiform, stigma small capitate. Capsule globose, septici- 

 dally 2-valved. Seeds numerous. — Species 3, in the Himalaya, Java, and 

 Ladrone Islands. 



1. C. paucisquama, Clarke in Herb. Calcutta ; pairs of scales on the 

 stem 1-2 only. 



Sikkim; ; alt. 6000 ft., King. 



Stem 2-4 in., white, fleshy. Leaves J in., elliptic, white. Calyx-lobes ^ in., oblong, 

 white. CoroMa-ZoJes Jin,, linear-lanceolate, dark blue. Filaments ^-^ in. Anthers 



