252 LXX. RUBIACEZ (HIERN). [ Diodia. 
sessile, scabrous especially above, ranging up to 1-2 by 3-1 in, lateral 
veins about 4-5 pairs, making an acute angle with the midrib, mar- 
gins scabrid-rugose or subserrulate ; stipules of usually 5 slender sets 
rather shorter than the fruit arising from a short truncate base. 
Flowers sessile or subsessile, several or few together, tetramerous. 
Calyx green. Corolla white. Fruit 3-4 in: long.—Spermacoce serru- 
lata, P. Beauv. Fl. Owar. p. 39, t. 23; ? Diodia littoralis, Wawra and 
Peyritsch Sert. Beng. p. 39 (1860). 
Upper Guinea. Sierra Leone, Afzelius! Fernando Po, Th. Vogel! Mann! 
Niger Expedition at Nupe, Barter / Lagos, Barter ! Cape Coast, Brass! 
Wile Land. Niamniam-land, at Boddo, Schweinfurth ! 
Lower Guinea. Congo, Chr. Smith! Benguella, Wawra. 
Mozamb. Distr. Zanzibar Island, Kirk! Hildebrandt! 
Occurs also in Madagascar, the West Indies, Guyana, Panama, ete. 
Apparently identical with Diodia scandens and D. sarmentosa of Swartz. 
6. D. vaginalis, Benth. in Hook. Niger Fl. p. 424. A glabrous 
stiff herb with procumbent leafy branches. Leaves linear or linear- 
oblong, somewhat pointed at the apex, scarcely narrowed at the sessile 
base, rigid, scabrous on the margin, 1-1} by ¢-3 in., lateral veins 
obsolete ; stipules truncate, short, with 3 subulate rigid sete, connate 
and sheathing below. Flowers solitary, sessile. Calyx-lobes about 6. 
Corolla } in. long. 
_ Upper Guinea. Sierra Leone, Afzelius/ at Grand Bassa and on the Nun, creep- 
ing on the sands, Th. Vogel! Brass, Barter ! 
71. GAILLONIA, A. Rich. ; Benth. et Hook. f. Gen. Pl. ii. p- 144 
Calyx-tube oblong or oval; limb consisting of 2 foliaceous teeth or 
various, persistent. Corolla elongate funnel-shaped or shortly salver- 
shaped ; throat naked; lobes 4-5, ovate, spreading, valvate in the bud. 
Stamens 4-5, inserted at the throat of the corolla; filaments. short, 
some sometimes almost obsolete; anthers oblong. Disk inconspicuous: 
Ovary 2-celled ; style slender, with 2 short linear lobes; ovules solt- 
tary, attached about the middle to the septum, amphitropous. : 
dicoccous, oblong ; cocci indehiscent. Seeds oblong, subterete, marked 
with a longitudinal furrow on the ventral face; umbilicus ventral ; 
radicle elongated, inferior.—Small rigid undershrubs with small oppo 
site linear or subulate sessile leaves, sheathing usually bisetose stipwies 
adnate to the base of the leaves, and small sessile or subsessile flowers 
spicate in dichotomous cymes or axillary and terminal. 
A genus of a few species extending from North Africa to North West India. 
Besides the following species, there is in the Kew Herbarium a small species 
probably obtained in Tropical Africa, from Dr, Livingstone’s Memorandum book 
apparently belonging to this genus; it is without leaves and seems to be an unde- 
scribed species. 
1. G. calycoptera, Jaub. et Spach, Illustr. Pl. Or. i. P- ek 
. 80. A rigid virgately branched undershrub, woody at the bas ‘ 
1-2 feet high, nearly glabrous. Branches terete, slender, canesce?™ 
