466 204- BORRAGINACEAE 



ornamental or medicinal plants. " Alkanet." (Including Stomotechium 

 Lehm.) Anchusa L. 



26. (14.) Tips of the nutlets considerably projecting above their surface of 



attachment. [Tribe ERITRICHIEAE.] 27 



Tips of the nutlets scarcely or not projecting above their surface of attach- 

 ment. [Tribe CYNOGLOSSEAE.] 31 



27. Surface of attachment of the nutlets at least half as large as their ventral 



surface 28 



Surface of attachment of the nutlets occupying less than half their ventral 

 surface. Prostrate herbs 29 



28. Nutlets beset with hooked bristles, usually margined. — Species 7. North 



and South Africa. Some are used medicinally. {Echinospermutn 



Swartz) Lappula Moench 



Nutlets without hooked bristles, not margined. — Species i. North-west 

 Africa. {Megastoma Coss. et Durieu) .... Eritrichium Schrad. 



29. Surface of attachment of the nutlets not margined ; nutlets keeled on the 



back. Calyx much enlarged in fruit. — Species i. North-west Africa. 



Used for dyeing and in medicine Asperugo L. 



Surface of attachment of the nutlets surrounded by a prominent margin. 

 Calyx slightly enlarged in fruit 30 



30. Surface of attachment of the nutlets shallow-concave, with a slightly pro- 



jecting margin. — Species i. Naturalized in the Mascarene Islands. 



Bothriospermum Bunge 



Surface of attachment of the nutlets deep-concave, with a toothed margin. 



— Species i. Egypt Gastrocotyle Bunge 



31. (26.) Nutlets attached to the receptacle towards their apex, saccate at 



the base. Calyx slightly enlarged in the fruit 32 



Nutlets attached to the receptacle by almost their whole inner surface. 34 



32. Corolla-segments erect, blue or red. Anthers projecting beyond the 



corolla-tube. Stigma capitate. Inflorescence compact. — Species 2. 



North Africa Solenanthus Ledeb. 



Corolla-segments spreading ; tube short. Anthers concealed within the 

 corolla-tube 33 



33. Nutlets distinctly concave on the back, with an inflexed margin. Corolla 



white or blue, with a very short tube. — Species i. Naturalized in 

 North Africa. An ornamental plant, also used in medicine. 



Omphalodes Moench 

 Nutlets nearly flat on the back. Stigma broadened. — Species 20. Some 

 of them are poisonous or used medicinally. " Houndstongue." 



Cynoglossum L. 



34. Calyx much enlarged after flowering, enclosing the fruit. Corolla without 



distinct scales within. Anthers prolonged at the apex into a long, 

 usually twisted appendage. Inflorescence bracteate. Lower leaves 

 opposite. — Species 20. Tropical and South Africa, Sahara, and Egypt. 

 Some are used medicin.ally. {Borraginoides Boerh., Pollichia Medik.) 



Trichodesma R. Br. 



