2 G. King — Materials for a Flora of the Malayan Peninsula. [No. 1, 



rarely oblique, unisexual in Gyrpteronia. Calyx-tube free, persistent ; 

 lobes 3-6, valvate, some accessory often added. Petals as many as 

 the calyx-teeth, rarely 0, inserted near the mouth of the calyx-tube. 

 Stamens definite or numerous, inserted on the calyx-tube. Ovary free 

 in the bottom of the calyx- tube (rarely inferior), 2-6- celled, style long; 

 stigma capitate, rarely 2-lobed ; ovules numerous, placentas axile 

 (rarely parietal). Fruit coriaceous or membranous, free or more or 

 less adnate to the base of the calyx, 2-6-celled or (by absorption of 

 the partitions) 1-celled, dehiscent or indehiscent. Seeds numerous, 

 various in shape, angular, sometimes winged ; albumen none ; embryo 

 straight, (cotyledons convolute in Sonneratia and Punica.) Distkib. 

 Species about 275 in tropical regions and especially in those of the 

 New World ; a few in temperate zones. 



Tribe I. Ammanni^e. Herbs, mostly sub-aquatic, with small 



or minute flowers ; the calyx membranous ... ... 1. Ammannia. 



Tribe II. Lythre^. Trees or shrubs with moderate or large- 

 sized flowers (minute in Crypteronia), large often wrinkled 

 petals, and coriaceous or herbaceous calyx. 

 Stamens not more than 12. 



Calyx 6-toothed ; petals 6 ; stamens 12 ; capsnle circum- 



scissile, 1-celled ; seeds cuneate-obovate, angled ... 2. Pemphis. 



Calyx 4- or 5-toothed ; petals ; flowers numerous, minute, 

 racemose, sub-unisexual ; stamens 4 or 5 ; capsule 2-celled 

 and 2-valved ; seeds minute, narrowly winged on one 

 side ... ... ... ... ... 3. Crypteronia. 



Stamens indefinite. 

 Seeds free, not imbedded in pulp. 



Stamens in 2 or more rows ; capsule 3-6-celled ; seeds 

 large, winged laterally ... ... ... 4. Lagerstrcemia. 



Stamens in a single row ; capsule 4-8-celled ; seeds 



minute, narrowly winged at the upper margin ... 5. Duabanga. 



Seeds imbedded in pulp, angular ; berry 10-15-celled ... 6. Sonneratia. 



1. Ammannia, Linn. 



Annual glabrous herbs growing in damp places ; branches often 

 quadrangular. Leaves opposite and alternate, sometimes whorled, entire ; 

 stipules 0. Floivers small, axillary, solitary and subsessile, or in small 

 trichotomous cymes ; bracteoles usually 2. Calyx campanulate or tubu- 

 lar-campanulate, 3-5-toothed, often with minute interposed teeth or 

 folds. Petals 3-5 or 0, small, inserted between the calyx-teeth. Stamens 

 2-8, inserted on the calyx-tube. Ovary enclosed in the calyx-tube, 1-5- 

 celled, the septa very thin and often absorbed ; style filiform or short, 

 stigma capitate ; ovules numerous, placentas axile. Capsule membran- 

 ous, globose or elongated-ellipsoid, enclosed in the calyx, 2-3-valved, 



