Materials for a Flora of the Malayan Peninsula. 19 



smootK or asperulous ; raphe usually tlaick, spongy. Species over J 00 

 throughout tropical Asia. 



Leaves similar, although often very unequal in size. 

 Stamens 3. Fruit usually smooth (see No. 12-14) ; valves 

 entire, distinct, exceeding the margin of the mature 

 calyx (§ Eu-Sonerila) : — 



Erect or ascending herbs with fibrous roots and without 

 rhizome : — 



Calyx vei'y slender (also in fruit) ; stem with 2 some- 

 what raised, commissural lines. Very scantily hairy 

 or glabrous, often much branched and small- or 

 narrow-leaved (except No. 1) herbs : — 



Leaves ovate, 1-1*7 in. by 7-'9 in. ... ... 1. S. epilohioides. 



Leaves much smaller or at least very much 

 narrower : — 



Anthers •12-*18 in. long: — 



Leaves oblong to elliptic-oblong, 'S-5 by 



•15-23 in. ... ... ... ... 2. 8. calamintliifoUa. 



Leaves lanceolate, 1-1*75 in. by •1.5-23 in. ... 3. S. hyssopifolia. 



Anthers '06-09 in. long ... ... ... 4. S. erecta. 



Calyx more or less oblong- or ovoid -campanulate ; 

 fruit turbinate or obpyramidal. Stem terete or 

 quadrangular : — 



Leaves more or less ovate, long acuminate, 1-2 in. 

 by *4-l in. or still smaller, acutely and coarsely 

 toothed, thin, 3-5-nerved from the very base ; 

 petioles long, very slender ... ... ... 5. S. tenuifolia. 



Leaves usually larger, not coarsely toothed : — 



Upper side-nerves starting from above the base : — 

 Leaves pinnatinerved, acute or acuminate at 

 the base ... ... ... ... ... 6. S.fiaccida. 



Leaves not pinnatinerved (rarely subpinnati- 

 nerved in No. 7) ; all the side-nerves springing 

 from near the base, rarely the uppermost from 

 near the middle : — 



Cymes distinctly peduncled: — 



Anthers subacute, •09-*12 in. long; leaves 

 membranous, rounded or subcordate at 

 the base ... ... ... ... 7. 8. andamanensis. 



Anthers slender, acuminate, *2-"3 in. long: — 

 Stem, petioles and inflorescence minutely 

 tomentose ; leaves thinly membranous, 

 subcordate at the base on very long and 

 slender petioles ... ... ... 8. 8. pop^Uifolia. 



Stem, petioles and inflorescence with 

 long hairs ; leaves acute or rounded, but 

 not subcordate at the base : — 



Leaves membranous, more or less 



oblong, usually acute at the base ... 9. 8. pallida. 



427 



