113 



1. X. oxyantha. 



2. 

 3. 



X. dicarpa. 

 X. malayana. 



cymose or fascicled ; buds triquetrous, conic, often slender. Sepals 3, 

 valvate, connate. Petals 6, elongate, valvate, in 2 series ; outer flat or 

 concave ; inner nearly as long, trigonous, concave at the base only. Torus 

 flat, or hollow and enclosing the carpels. Stamens oblong, truncate or 

 connective pi'oduced ; anther-cells remote or contiguous, often septate 

 and with a large pollen-grain in each cellule. Ovaries I or more ; style 

 long, clavate ; ovules 2-6 or more, 1- to 2-seriate. Eipe carpels long or 

 short, continuous or moniliform, usually several-seeded. — Distrib. Tro- 

 pics generally ; species 60 to 70. — Closely allied to Melodorum, but very 

 different in habit. 

 Leaves quite glabrous. 



Leaves 6 or 7 in. long 



Leaves between 3 and 5 in. long. 



Ripe carpels cylindric, boldly tubercled 

 ,, ,, ,, smooth 



Leaves between 2 and 3 in. long. 



Flowers always solitary ; pedicels with 

 2 or 3 orbicular bracteoles, apical pro- 

 cess of stamens rounded, anther-cells 

 septate 

 Flowers solitary or in pairs, "5 in. long : 

 pedicels with orbicular basal bracte- 

 oles ; apical process of stamens round- 

 ed ; anther-cells septate... 

 Flowers in fascicles or solitary, "75 in. 

 long : pedicels ebracteolate ; apical 

 process of stamens oblong : anther- 

 cells not septate 

 Both surfaces of leaves glabrous, the midx'ib alone 

 pubescent in its lower half on the upper sur- 

 face ; length 5"5 to 95 in. 

 Leaves glabrous on the upper surface (the midrib 

 pubescent in X. caudata), the lower slightly 

 pubescent or puberulous. 



Leaves more or less lanceolate, acute or acu- 

 minate, not at all obovate. 

 Leaves 2 or 3 in. long. 



Leaves not glaucous beneath. 



Flowers '5 to "57 in. long, soli- 

 tary, axillary, obtuse 

 Flowers '2 to "25 in. long, axil- 

 lary, solitary, or 2 to 3 to- 

 gether 

 362 



4. X. Maingayi. 



5. X. pustulata. 



6. X. fusca. 



7. X. Gurtisii. 



8. X. elliptica. 



9. X. caudata. 



