383 
Echinops longifolius, A. Rich. ; F.T.A. iii. 431. 
Naraguta, 4000 ft., 30 May, flowers white, leaves white 
below, No. 247. 
Distrib.—North Tropical Africa. 
Centaurea nigerica, Hutchinson, sp. nov., C. solstitiali, Linn., 
remote affinis, sed foliis majoribus, involucri bracteis pectinatis 
vix spinosis differt. 
Herba erecta, usque ad 1 m. alta, superne parce ramosa; 
caules et rami foliis decurrentibus anguste alati, arachnoideo- 
villosi. Folia linearia vel lineari-oblanceolata, acute apiculata 
basi decurrentia, 6-8 cm. longa, 0-6-1 cm. lata, firme chartacea 
vel fere coriacea, integra, utrinque scabrida et etiam tenuiter 
arachnoideo-villosa, nervis paucis ascendentibus infra conspicuos 
Capitula solitaria, terminalia, sessilia, circiter 3-5 cm. diametr. 
. 7. Centaurea nigerica, Hutchinson. 1, inner involucral bract ; 
2, stamen; 3, style; 4, flower; 5, achene & pappus, 
et 3 cm. longa. Involucrum globoso-campanulatum, superne 
contractum, circiter 1-5 cm. diametro; bracteae 6-7-seriatae, 
apice pectinatae, segmentis lineari-filiformibus 2-5-3 mm. 
longis cartilagineis glabris. Flores pallide roseo-coerulei. 
Receptaculi setae albae, filiformes 7-8 mm. longae. Corollae 
tubus anguste cylindricus, superne leviter et sensim ampliatus 
longitudinaliter nervosus, glaber, lobis linearibus obtusis 5 mm. 
