Diodia] LXIX. RUBIACEAE. 501 
45. DIODIA Gronov., L. ; Benth. & Hook. f. Gen. Pl. ii. p. 143. 
1, D. maritima Thonn. ex Schum. in Dansk. Vidensk. Selsk. iii. 
p. 95 (1828); Hiern in Oliv. Fl. Trop. Afr. iii, p. 231. 
Loanpa.—Rather fleshy throughout, glaucous-green, creeping a long 
distance half buried in the sand of the sea-shore, throwing out slender 
fibres from each node of the prostrate or creeping stem, growing quite 
after the fashion of Arenaria peploides L.; leaves beset with hyaline 
papilla ; flowers white ; corolla segments narrowly ovate, rather obtuse 
and fleshy ; the tube clothed near the bottom with rather long hairs ; 
stamens falling short of the style ; filaments filiform, not subulate ; 
stigma peltate-capitate, somewhat sulcate-bilobed, white ; fruit almost 
ventricose-cylindrical. In sandy maritime places between Penedo 
and Conceigao, rather rare ; half-ripe fr. and few fl., 25 May 1858. 
No. 3217. 
Barra DE Danpr.—A prostrate suffrutescent herb ; leaves rough, 
rather rigid, bright-green in the living state. At Praia between the 
mouths of the rivers Dande and Bengo, sparingly and nearly always in 
company with Zpomea biloba Forsk. ; fl. and fr. Sept. 1858. No. 3216. 
BENGUELLA.—Stems 6 to 8 ft. long, quadrangular, winged, purplish. 
In sandy maritime places near the city ; fr. June 1859. No. 3218. 
2. D. scandens Swartz, Prodr. Ind. Oce. p. 30 (1788). 
D. breviseta Benth. in Hook. Niger Fl. p. 424 (1849); Hiern, duc. 
GoLuneo AtTo.—A suffruticose herb ; stem branched from the 
base ; branches long, sarmentose, climbing; leaves rigid, scarcely 
coriaceous; stipules with setaceous teeth. In forests among the 
mountains of Queta by the river Delamboa, very rare; fr. end of May 
and in June 1856. No. 3215. 
Punco ANDONGO.—At Catete ; a young plant in very young fl.-bud 
Dec. 1856. Very doubtfully referred here. No. 3251. 
3. D. flavescens Hiern, sp. n. 
A scabrid-pubescent perennial herb; rootstock fleshy, woody, 
thick, 3 to 5 in. deep, 1 to 14 in. in diameter, forming several 
heads ; stems erect or ascending, simple or slightly branched near 
the base, 8 to 16 in. high, sub-glabrate or puberulous and scarcely 
angular below, scabrid-hirsute, lined and furrowed above, leafy 
with very short internodes towards the apex ; internodes about 
equalling the leaves near the middle of the stems; leaves oval- 
oblong, apiculate at the scarcely acute apex, a little narrowed at 
the sessile or sub-sessile base, herbaceous, deep-green and roughly 
scabrid above, yellowish-green and hispidulous-scabrid beneath, 
2to liin. long by 4+ toZin. broad; margin rough, narrowly 
revolute ; lateral veins about 3 on each side of the midrib, slender, 
making a small angle with the midrib, depressed on the upperside 
of the leaves; stipules adnate to the leaf-bases or short petioles, 
giving off several reddish sete from a short truncate base, hairy 
outside, glabrous and shining inside; flowers axillary, pale- 
yellowish, 4 in. long exclusive of the exserted stamens and style, 
sessile or sub-sessile, a few or several together in small axillary 
bracteolate clusters; bracteoles lanceolate-subulate, shorter than 
the calyx, ciliolate ; calyx ¢ in. long, squamulose-puberulous ; the 
