236 Lxx. RUBiACE^ (hieen). ISpermococe. 



equalling or exceeding the ovary, shortly hairy, spreading. Corolla 

 white, funnel-shaped ; tube very short. — Diodia pilosay Schum. et 

 Thonn. Beskr. Guin. PI. p. "!&. 



upper Crulnea. Guinea, Aquapim, Thonning ; (? Sierra Leone, 7%. VogeV). 



6. S. senensls, Hiern. Herbaceous. Branches subterete or 

 obtusely 4-sided, somewhat compressed towards the extremities, of a 

 straw colour, pubescent. Leaves lanceolate or elliptical, narrowed 

 towards both endo, sessile, more or less scabrous and hairy above with 

 depressed veins, somewhat hairy beneath, 2-3 in. long ; stipules with 

 a short hairy sheath and 5-7 longer setulose setae. Flowers white, 

 ^ in. long, several together, verticillate ; heads ^ in. diam., sessile in 

 the upper axils, based by 1-2 pairs of leaves ; bracteoles straw-coloured 

 or reddish, falling short of the calyx- teeth. Calyx-teeth, 4, subequal, 

 lanceolate-subulate, somewhat hairy, as long as the ovary. Corolla- 

 tube about equalling the calyx-teeth. Anthers just exserted. Capsule 

 straw-coloured, ^-^ in. long, somewhat hairy near the apex ; seeds 

 about as long. — Diodia senensis, Klotzsch in Peters Mossamb. Bot. 

 p. 289. 



nSozazub. Distr. Eios de Senna, Tette, Peters ! Zambesi-land, Stewart ! be- 

 tween Tette and the coast, and Manganja country near Soche hill, at elevation of 

 3,000 ft., Kirk! 



Difficult to distinguish from Hypodematium sjphmrostigma, A. Rich, except in fruit ; 

 the flowers are moreover rather smaller. 



Var. angustifolia, Aschers, ex Schweinf. Beitr. Fl. -^thiop. p. 245. Leaves sub- 

 linear, 2 by ;|^ in. 



xrile Iiand. By the Upper "White Nile, v. Hornier ! (a poor specimen which 

 should be compared Avith Hypodematium sphcBrostigma, A. Rich). 



7. S. stricta, Linn. f. ? Suppl. Sp. PI. p. 120 (1781), non Linn. 

 Hh. A glabrous annual, simple or somewhat branched ranging up to 

 18 in. high. Stem and branches slender, subterete below, marked 

 with veined lines above. Leaves linear, narrowed at both ends, 

 slightly scabrid, 1-1^ in. long, sessile. Flowers small, numerous, ver- 

 ticillate, in small terminal and axillary heads of ^-^ in. diam., based by 

 1-3 pairs of spreading or at length reflexed leaves ; bracteoles slender, 

 falling short of the calyx-teeth. Calyx-teeth 4, subequal, subulate, 

 puberulous, shorter than the fruit. Corolla-tube very short. Capsule 

 puberulous at the apex or rarely glabrous, small, dehiscing widely. 



Upper Guinea. Sierra. Jjeone, Jfzelius / Pur die .' 



Wile ]Land. Ukidi Forest, on low sandy ground, 2-3° N. lat. Speke and Grant ! 

 Mozamb. Sistr. Near ' Expedition Island.' Kirk! {S. natalensis, Hochst. ; a 

 variety with glabrous more obtuse calyx-teeth, perhaps a distinct species.) 

 A common tropical weed, at least in the Old World. 



8. S. hebecarpa, Oliv. in Trans. Linn. 8oc. Lond. xxix. p. 89, oion DC. 

 A rather slender, erect, subsimple or branched annual, ranging up to 

 18 in. high. Stem and branches glabrous or nearly so, somewhat 4- 

 eided or narrowly 4~keeled. Leaves linear, narrowed at both ends, 

 sessile, stiff, glabrous or nearly so, scabrid on the margins, glaucescent 

 beneath, ranging up to 2 by 4^ in. ; stipules with a hairy sheath, 

 J-^ in. long and 3-5 equalling or rather longer setae. Flowers slender. 



