286 Flora of the Malayan Peninsula. 



Bract enveloping the calyx ; pollen spherical . . 7. Calystegia. 



Bract not enveloping the calyx ; pollen polyhedral . . 8. Hewittia. 

 Ovary 2-locular, sometimes 4-locular : — 



Outer 3 sepals much larger than the 2 inner, and 

 decurrent on the peduncle ; stigmas capitate . . 9. Aniseia. 



Outer 3 sepals not larger than the 2 inner, and not 

 decurrent on the peduncle : — 



Stigmas elliptic ; capsule 8-valved, rarely 4-valved 10. Jacquemontia. 

 Stigmas globose : — 

 Capsule 4-valved ; fruiting sepals not enlarged ; 

 bands of corolla usually with 5 purple lines ; 

 stems not winged .. .. ..11. Meeeemia. 



Capsule with circumscissile dehiscence ; fruiting 

 sepals considerably enlarged ; bands of corolla 

 without lines ; stems winged . . . . 12. Opeeculina. 



Corolla-tube not uniformly enlarged from base to apex, the 

 5 bands on the lobes clearly defined by 2 prominent lines ; pollen 

 spinulose : — 



Fruit dehiscent, or if indehiscent then with thin fragile walls : — 

 Stamens arising from the backs of 5 scales attached to 

 the corolla-tube ; flowers small urceolate, fasciculate ; fruit 

 4-valved . . . . . . . , . . 13. Lepistemon. 



Stamens arising directly from the corolla-tube : — 

 Corolla more or less campanulate ; calyx-lobes never 

 aristate, inflorescence never scorpioid ; stamens not ex- 

 serted . . . . . . . . . . 14. Ipomoea. 



Corolla more or less hypocrateriform ; calyx-lobes aristate, 

 or if obtuse the inflorescence scorpioid ; stamens exserted : — 



Flowers rather small, pink or red, slightly irregular . . 15. Quamoclit. 

 Flowers large white, regular . . . . . . 16. Calonyction. 



Fruit indehiscent, coriaceous or fleshy : — 



Ovary 4-celled . . . . . . . . . . 17. Aegyeeia. 



Ovary 2-celled . . . . . . . . . . 18. Lettsomia. 



1. CuscuTA, Linn. 



Leafless twining yellow-reddish parasitic herbs. Floivers small, 

 white or rose-coloured, fascicled, sessile or shortly pedicelled ; bracts 

 small or 0. Sepals 5 or 4, sub-equal; free or shortly connate at the base. 

 Corolla ovoid or campanulate, usually with a ring of fimbriate or lobed 

 scales near the base or below the stamens ; lobes short, imbricate. 

 Stamens 5 or 4, adnate near throat of corolla ; filaments short, linear ; 

 anthers oblong, partially exserted. Ovary more or less completely 

 2-celled ; ovules 4 ; styles 2 or 1 ; stigmas 2. Fruit a globose or ovoid, 

 dry or succulent, circumscissile or irregularly bursting 4-2-seeded 

 capsule. Seeds glabrous ; albumen fleshy ; embryo slender, spiral ; 

 cotyledons minute or obsolete. — Distrib. Species about 80, in tempe- 

 rate and tropical regions. 



CuscuTA Hygeophil^, H. H. W. Pears, in Hook. Ic. Plant, t. 2704. 



