Cressa.] XC. CONVOLVULACEiE (baker and rendle). 73 



2| 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, H-2 lin. long. Pericarp 

 thin, brittle. Seed ovoid, glabrous. — Choisy in DC. Prodr. ix. 440 ; 

 Hiern in Cat. Afr. PI. Welw. i. 724 ; Hallier f. in Engl. Jahrb. xviii. 

 87, and in Ann. Istit. Bot. Roma, viii., 222. 



Upper Guinea. Senegal, Heudelot ! Leprieur ! Roger! 



Wile Land. Nubia: near Suakin, Sckweinfurih, 2164, Johnston! Soudan* 

 Lecard. Eritrea: Dalilak Archipelago, Terraciano, 262, 682, 774, 852, 875; 

 Samhar, Magazzi Sf Pappi, 1249; Assaorta, Pappi, 79. 



Lower Guinea. Angola: Mossamedes, Welwitsch, 6137 ! 6139! Gossweiler, 

 66 ! Benguella, Welwitsch, 6138 ! 



Also in North Africa, Socotra, Madagascar, and damp sandy places, especially by 

 the sea, in both hemispheres. 



8. SEDDEEA, 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-cellecl, 4-ovuled, hairy at 

 the apex ; style bifid almost or quite to the base ; stigmas more or less 

 peltate and orbicular, sometimes bilobecl. 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, 

 Spinescent with very small leaves, 4 lin. or less in 

 length. 

 Corolla 3 lin. long . . . . . . . 1. S. somalensis. 



Corolla barely 2 lin. long. 



Leaves 3—4 1 n. long . . . . . 2. 8. intermedia. 



Leaves not exceeding 2k lin. long . . . 3. S. spinescens. 



Spinescent with rather larger leaves, about 6 lin. long . 4. 8. hirsuta. 

 Not spinescent. 



Leaves narrow linear . . . . . 5. S. virqata. 



Leaves more or less elliptic to ovate. 

 Flowers solitary in the leaf-axils. 



Flowers subsessile ; corolla not exceeding the 



calyx . . . . . . 6. 8. latifolia. 



Flowers stalked. 



Plant barely 4 in. high . . . . 7. S. humilis. 



Stems about 1 ft. high. 



Flower-stalk long; bracteoles minute . 8. 8. arabica. 



Flower-stalk short; bracteoles leafy . 9. S. capensis. 



Flowers in dense few-flowered cymes. 

 Sepals about 2 lin. long. 



Cymes subsessile ...... 10. 8. suffruticosa. 



Cymes on short slender peduncles . . . 11. 5. WelwitscMi. 



Sepals 1 lin. long . . ... 12. 8. schizantha. 



