476 lviii. lythraceje (hiern). [Nesaa. 



near base of interior of tube of calyx, those opposite the cornua being 

 inserted on a rather higher level than the rest, exserted. Ovary oval ; 

 style very long, tortuous in upper part. Capsule 4 (?) -valved, with 

 thick lobed placenta. 



Mozamb. Distr. Mozambique, Forbes! Zambesi, Dr. Kirk! 

 Occurs also in Madagascar. 



5. AMMANNIA, Linn. Gen. n. 155 ; Benth. et Hook. f. Gen. 

 Plant, i. 776 (part). 



Calyx membranous, persistent, campanulate in flower, with 4 deltoid 

 lobes and 4 external cornua narrower than the lobes. Petals 4, cadu- 

 cous or wanting, usually not larger than the calyx-lobes, white, violet 

 purplish rose-coloured or in A. passerinoides yellow, not corrugated in 

 bud.. Stamens 4, opposite the calyx-lobes, or 8, in one row, usually 

 arising from near the base of the calyx-tube, about the length of the 

 calyx or exserted ; filaments slender. Ovary free, 1-4-celled ; ovules 

 numerous ; style filiform, persistent, usually short or long according as 

 the stamens are included in the calyx or exserted ; stigma capitate. 

 Capsule usually spherical and exceeding the calyx, bursting irregularly, 

 more or less circumsciss, usually 1-celled and longer than the calyx ; 

 placentation ovoid, compressed or peltate. Seeds numerous, small, 

 globular or triangnlar in outline, often concave on one side ; radicle 

 very short. In a few species the flowers are .occasionally pentamerous. 

 — Annual or biennial herbs, with leaves sessile or subsessile, usually 

 glabrous and opposite. Flowers in axillary cymes, with 2 bracteoles 

 at the base of the pedicels. 



Occurs in damp places in the Tropics of both hemispheres ; some species are extra 

 tropical, and one is naturalized in Italy. 



Glabrous or subglabrous. Leaves opposite. Petals not yellow. 

 Calyx-cornua small. Capsule bursting transversely across 

 middle. (Hapalocarpum). 

 Stem not spongy. Leaves lanceolate. 

 Cymes with evident peduncles. 



Stem branched or leafy at base 1. A. senegalensis. 



Stem naked at base 2. A. salsuginosa. 



Cymes subsessile. 



Erect, with spreading branches. 



Fruit-calyx hemispherical, shorter than the capsule. 



Pedicels evident. Leaves attenuate at base . . 3. A. baccifera. 

 Flowers subsessile. Leaves often somewhat nar- 

 rowed but not attenuated at base . . . ■ . . 4. A. solid folia. 

 Fruit-calyx urceolate, enclosing capsule . ... 5. A. urceolata. 

 Decumbent, with sinuous branches ....... 6. A. diffusa. 



Stem spongy. Leaves obovate . ... 1. A. crassicaulis. 



Calyx-cornua conspicuous. Capsule bursting transversely 

 near apex (Ditheca). 



Leaves fleshy 8. A. sarcophylla. 



Leaves not fleshy. 



Cymes sessile. Leaves ovate-oblong „ 9. A. Loandensis. 



Cymes usually peduncled. Leaves lanceolate . . . . 10. A. aspera. 

 Pubescent. Leaves alternate opposite, and whorled. Petals 



yellow " li. A. passerinoides. 



