Acrotrema.] Dilleniacece. 7 



peduncles, bracts large, membranous ; fl. yellow ; sep. and 



pet. 5; stam. 15-50, usually in 3 bundles; carp. 3, slightly 



coherent in centre, ov. with 2-indef. ovules, styles subulate, 



recurved ; follicles bursting irregularly ; seeds with a crus- 



taceous, pitted testa, surrounded by a white aril. — Sp. about 



10, all in Fl. B. Ind. 



Racemes with short peduncles. 



Leaves not pinnate or pinnatisect, or only so at the very base. 



Leaves obovate-oblong, obtuse 



Leaves lanceolate-oblong, acute 



Leaves linear-lanceolate, large 



Leaves linear-oblong, small . 

 Leaves pinnate or pinnatisect throughout. 



Leaflets or segments oblong, equal 



Leaflets or segments linear, unequal 

 Racemes with long peduncles 



The only herbaceous genus in the family. 



All the Ceylon species are endemic. Besides them, there is also a 

 species endemic in Malabar, and another (the first known) in the Malay 

 Peninsula. 



Most of the species are ill-defined and extremely variable, and I have 

 failed to obtain any clear idea of their limits. They doubtless hybridise 

 freely. 



They are very pretty little plants, growing in damp mossy places, the 

 crevices of rocks and shady woods ; their habit rather reminding one of 

 the common Enghsh primrose, but the flowers more like Potentilla. 



All are confined to the low country of the moist region ; one species 

 only extending into the lower montane zone. 



I. A. uniflorum, Hook. Ic. PL ii. t. 157 (1837). Bin-beru, S. 



Hk. f. and Th. Fl. Ind. 64. Thw. Enum. 2. 



Fl. B. Ind. i. ZZ (including A. Walkeri). Hook. Ic. PI. t. 157. 



L. usually obovate-oblong, broad or narrow, usually obtuse 

 at apex and narrowed or attenuate towards base, the actual 

 base being generally cordate or auriculate, usually crenate- 

 dentate, rarely entire, sometimes deeply cut or even com- 

 pound with separate Iflts. at base, glabrous or pilose or hairy 

 or scabrid above and beneath, the veins always hairy, often 

 rugose or bullate ; fl. 1-8 in the raceme ; stam. 15-50. 



Extremely variable, almost every district producing a local form ; the 

 following named varieties are completely connected by intermediates, 

 and might be indefinitely extended. 



Var. a. petiolare, Thw. Enum. 2. C. P. 265, 3882 (coloratwn^ 

 Thw. MS.), 3896 {mi?ius Thw. MS.) L. narrow, usually on long petioles, 

 glabrous above ; stam. about 30. 



Var. /3. rotundatiun, Thw. Enum. 2. C. P. 1014, 3486 (a small form). 

 L. broad, shortly petiolate, often nearly entire. 



Var. y. bullation^ Hk. f. and Th. A. btdlatiim, Thw. Enum. 2. 

 C. P. 239. Lves. very bullate above, and excavated between the veins 

 beneath, softly pubescent ; stam. about 20. 



