230 Lxx. RUBiACE^ (hiern). [Afithos'p&rmum. 



3. A. asperuloldes, Hook. f. in Journ. Linn. Soc. Lond. vi. 11 ; 

 et vii. 197. A small tufted undershrub, 6 in. high. Branches flex- 

 nose, intertwining, woody below, wiry and pnbemlous above. Leaves 

 linear or linear-oval, pointed or usually mucronate, fasciculate, some- 

 what narrowed to the very shoii; dilated petiole, glabrescent, ^— ^ in. 

 long, margins revolute, slightly scabrid ; stipules short, truncate, 

 4-cuspidate, cusps subulate. Flowers tetramerous. Ovary hairy. 

 Fruit at length glabrous. 



Upper Guinea. Fernando Po, at the top of Clarence Peak (10,000 feet eleva- 

 tion), Mann! Cameroon Mountains, at elevation of 12,000 feet, Mann! 



70. DIODIA, Gronov. ; Benth. et Hook. f. Gen. PL ii. p. 143. 



Calyx-tube obovoid or oval or oblong ; limb 4f-6-partite or disepa- 

 lous, persistent; segments coriaceous, sometimes with minute inter- 

 vening teeth. Corolla funnel-shaped, membranous, usually tetramerous, 

 white ; throat glabrous or hairy ; lobes short, valvate in aestivation. 

 Stamens usually 4, glabrous, inserted on the throat of the corolla, 

 exserted ; filaments slender ; anthers linear-oblong, fixed at the back 

 near the middle, spreading. Disk inconspicuous. Ovary usually 

 2-celled ; style exserted, slender, bidentate at the tip ; stigma subcapitate ; 

 ovules solitary, inserted at the middle of the septum, amphitropous. 

 Fruit usually dicoccous ; cocci plano-convex, crustaceous or corky, 

 smooth or furrowed on the back, both indehiscent. Seeds oblong ; 

 embryo straight, cotyledons broad, radicle terete, inferior. — Decum- 

 bent or climbing weedy herbs with elongated or rambling branches, 

 often with abbreviated branches in the axils, sessile or subsessile oppo- 

 site leaves, short sheathing 3-6-setose stipules and axillary small sessile 

 or subsessile solitary or verticillate flowers. 



A genus of several species scattered over the tropics and •warm regions of America 

 and the West Indies as wt>ll as in Africa. 

 Calyx-limb dimerous. 



Leaves linear \. D. Kirkii. 



Leaves oval 2. D. rubricosa. 



Calyx-limb tetramerous. 



Leaves sub in ear. Glabrous 3. D, arenosa ?. 



Leaves oval or elliptical, spreading. Branches glabrous 

 scabrous or pubescent. 



Flowers usually solitary 4. 7). onariti7na. 



Flowers usually several together, verticillate . . . . . 5. D. hreviscia. 

 Calyx-limb usually hexamerous . 6. 2). 



1. X>. XLirkil, Hiern. Branches subterete, glabrate below, bifari- 

 ously puberulous above. Leaves narrowly linear, somewhat narrowed at 

 both ends, sessile, glabrous, |-1^ in., margins revolute, lateral veins 

 obsolete ; stipules sheathing, puberulous, shortly 5-6-setose, setaB 

 unequal, puberulous. Flowers sessile, a few together, tetramerous. 

 Calyx-lobes 2 of a moderate size, persistent opposite, the others obsolete 

 represented by puberulous tufts. Stigma subcapitate. Fruit ^ in. 

 long, puberulous above. 



Mozamb. Distr. Mouth of West Luabo, Kiri> 



