Cressa. | XC. CONVOLVULACEE (BAKER AND RENDLE). 73 
24 lin. long ; tube cylindrical, enveloped by the calyx; lobes narrowly 
ovate, about as long as the tube, hairy on the outside. Stamens rather 
longer than the corolla. Capsule ovoid, 13-2 lin. long.  Pericarp 
thin, brittle. Seed ovoid, glabrous. —Choisy in DC. Prodr. ixe 440; 
Hiern in Cat. Afr. Pl. Welw. i. 724; Hallier f. in Engl. Jahrb. xvii. 
87, and in Ann. Istit. Bot. Roma, viii. oon: 
Upper Guinea. Senegal, Heudelot! Leprieur! Roger! 
Nile Land. Nubia: near Suakin, Schweinfurth, 2164, Johnston ! Soudan; 
Lecard. Eritrea: Dahlak Archipelago, Terraciano, 262, 682, 774, 852, 875; 
Samhar, Ragazzi § Pappi, 1249; Assaorta, Pappi, 79. 
Lower Guinea. Angola: Mossamedes, Welwitsch, 6187! 6139! Gossweiler» 
66! Benguella, Welwitsch, 6138 ! 
Also in North Africa, Socotra, Madagascar, and damp sandy places, especially by 
the sea, in both hemispheres. 
8. SEDDERA, Hochst. in Flora, 1844, Beil. 7, t. 5. 
Sepals acute or obtuse, subequal or the outer slightly larger. Corolla 
funnel-shaped ; lobes very short, or longer. Stamens inserted low 
down in the corolla-tube ; filaments filiform, dilated at the base and 
often appendaged ; anthers oblong. Ovary 2-celled, 4-ovuled, hairy at 
the apex; style bifid almost or quite to the base; stigmas more or less 
peltate and orbicular, sometimes bilobed. Capsule 4-valved, valves 
thinly rigid. Seeds dark brown or black, glabrous ; cotyledons broad, 
plicate. —Small shrubs, with prostrate to suberect branches, sometimes 
spinescent. Leaves entire, small. Flowers axillary, solitary or aggre- 
gated into terminal spikes or into stalked or sessile dense few-flowered 
cymes. Corolla small, 6 lin. or less in diam. 
Species about 15, chiefly African and Arabian. 
Spinesceut with very small leaves, 4 lin. or less in 
length. 
Corolla 3 lin. long . : : : : . cae 
Corolla barely % tin. long. 
Leaves 3-41 n. long 
. somalensis. 
. intermedia. 
2) Way ay tea ea 
Leaves not exceeding 2 ae 1 lin. long . . . Spinescens. 
Spinescent with rather larger leaves, about 6 lin. long : . hirsuta. 
Not spinescent. 
Leaves narrow linear ‘. ; 3 . 5. 8: virgata. 
Leaves more or less elliptic to ov ate, 
Flowers solitary in the leaf-axils. 
Flowers subsessile ; corolla not exceeding the 
calyx : : : ; : : . 6. S, tatiford. 
Flowers stalked. a 
Plant barely 4 in. high 7. S. humilis, 
Stems about 1 ft. high. 
Flower-stalk long; bracteoles minute . 8. S. arabica. 
Flower-stalk short; bracteoles leafy . . 9. S. capensis. 
Flowers in dense few-flowered cymes. 
Sepals about 2 lin. long. 
Cymes subsessile . . : . 10. S. suffruticosa. 
Cymes on short slender ‘peduncles . : 2 Ll: Welwitschit. 
Sepals 1 lin. long . 12. 8S. sehizantha. 
