464 204- BORRAGINACEAE 



8. Style I, two -cleft. Shrubs or trees. — Species 30. Tropical and South 



Africa. Some species yield timber, edible fruits, or medicaments. 



Ehretia L. 

 Styles 2, free or nearly so. Anthers included. Prostrate herbs. Flowers 

 solitary, axillary. -- Species i. Central Africa. Used medicinally. 



Coldenia L. 



9. (i.) Ovary 2-celled, 2-ovuled. Nutlets 2, adnate to the columnar re- 



ceptacle by the ventral face. — Species i. North-west Africa. [Tribe 



HARPAGÖNELLEAE.] Rochelia Reichb. 



Ovary 4-celled, 4-ovuled 10 



10. Flowers more or less irregular. Corolla funnel-shaped, with an oblique 



limb and more or less unequal lobes. Stamens usually unequal in 



length. [Tribe ECHIEAE.] 11 



Flowers regular 14 



11. Calyx-segments 5, distinctly unequal, or 4. Stamens concealed in the tube 



of the corolla. Low shrubs or undershrubs 12 



Calyx-segments 5, equal or subequal. Stamens protruding beyond the 

 corolla. Nutlets seated upon a flat receptacle 13 



12. Calyx-segments 5, one of which is very small, or 4. Corolla 2-lipped. 



Nutlets laterally attached to the conical receptacle. Stems and leaves 

 clothed with white bristles. — Species i. North Africa to Nubia. 



Echiochilon Desf. 



Calyx-segments 5, one or two of them smaller than the others. Corolla 



almost regular. Nutlets seated upon the fiat receptacle. — Species 3. 



Central Africa. (Under Lobostemon Lehm.) . Leurocline S. Moore 



13. Style entire with an entire or shortly lobed stigma. Filaments usually 



with a hairy scale at the base. Corolla almost regular. — Species 50. 



South Africa Lobostemon Lehm. 



Style 2-cleft at the apex. Filaments without a scale at the base. — Species 

 45. North Africa and northern Central Africa, one species also natural- 

 ized in South Africa. Some of them are used as ornamental, medicinal, 

 or dye-plants. " Bugloss." Echium L. 



14. (10.) Nutlets inserted on a flat or very slightly convex receptacle (gyno- 



base) 15 



Nutlets inserted on an elevated, more or less conical or columnar receptacle 

 (gynobase) 26 



15. Surface of attachment of the nutlets flat or slightly convex, rarely some- 



what concave and then small. [Tribe LITHOSPERMEAE.] . . 16 



Surface of attachment of the nutlets concave and large, usually with a 



prominent ring-like margin. [Tribe ANCHUSEAE.] .... 22 



16. Ovary 2-lobed. Nutlets 2, two-celled. Glabrous or papillose plants. 



Corolla yellow. Anthers acuminate. — Species 3. North-west Africa. 



Used as ornamental or medicinal plants Cerinthe L. 



Ovary 4-lobed. Nutlets r — 4, one-celled 17 



