Blainvillea.'] Lxxiii. cOMPOSiTiE (olivee and hieen). 375 



A small wide-spread tropical genus. 

 Achenes (at least the outer ones) 3-sided ; sides glabrous. 

 Achenes transversely marked with minute wrinkles, not 



tubercled ; leaves dark green, hirsutely scabrid . . 1. Ti. Gay ana. 

 Achenes more or less tubercled ; leaves ashy green, 



hispidly scabrid % B. rhomhoidea. 



Achenes doubly convex, not 3-sided, villous Z. B. Prieicreana. 



1. B. Gayana, Cass. ! in Diet. 8c. Nat. xlvii, p. 90. Erect, hir- 

 sute, scabrous annual, of 1^-3 ft. or more ; stem striate, somewhat 

 angular ; branches alternate or opposite. Leaves ovate or the upper 

 lanceolate, acuminate, alternate or opposite, unequally serrate, shortly 

 cuneate at the 3-nerved base, ranging up to 4J by 2 J in. besides petioles 

 of If in. Capitula solitary in the forks oir loosely panicled, obovoid- 

 oblong or in fruit hemispherical, |-J in. long. Peduncles ranging up 

 to 2 in. Outer bracts of involucre lanceolate-oblong acute striate 

 hairy outside, equalling the florets ; inner similar but glabrous, jagged 

 at apex. Achenes (at least the outer ones) blackish, obconic-oblong, 3- 

 sided sometimes hispid in the angles, minutely transversely wrinkled, 

 ^ in. long, crowned with 3 barbellate setse nearly half as long as the 

 achene. 



Upper Crulnea. Senegambia, Gambia, Perrottet j Bi&jem! 



nrile Ziand. Abyssinia, Schim/per ! 



2. B. rhomboldea, Gass. ! in Bid. 8c. Nat. xxix. p. 494. Erect 

 di-trichotomous scabrid annual, 1-3^ ft. high. Stem striate subterete ; 

 branches alternate or opposite. Leaves lanceolate, alternate or opposite, 

 tapering towards the apex, crenate- serrate, ashy green, narrowed to 

 the 3-nerved base, ranging up to 3 by 1 in., besides petiole of ■§ in. 

 Capitula hemis|)herical, \-^ in. long, 1-2 together, in a panicled leafy 

 cyme. Peduncles ranging up to 1^ in. Outer scales of the involucre 

 oval-oblong, subobtuse, hairy outside at least towards apex, striate 

 below ; inner mostly shorter and jagged at apex. Achenes (at least 

 the outer ones) obconic-oblong, 3-cornered, glabrous except the angles 

 (in our specimens), more or less tubercled, terminated by 3 barbellate 

 setae. — Eisenmannia clandestinay Schultz Bip. in Herb. Kotschy n. 191. 



Wile Ziand. Cordofan, Kotschy.' Abyssinia, Ehrenherg ! 



lUEozamb. X>i8tr. Lower Zambesi, between Tette and the sea coast, Dr. Kirk! 



Our specimens differ from a type specimen that we have seen and from Brazilian 

 ones in the tubercles on the achenes ; the Zambesi specimen is sparingly tubercled. 

 An Arabian specimen is also tubercled. Extends also to India. 



3, B. Prieureana, BG. Prodr. v. p. 492. Erect hispid-scabrid 

 trichotomously branched annual, of 1-2 ft. or more. Stem and lower 

 branches sulcate-striate, angular. Leaves opposite or alternate, ovate- 

 lanceolate or the upper ones lanceolate, triplinerved, tapering or 

 acuminate, serrulate or nearly entire, acuminately narrowed to a 1- 

 nerved base, 1-5 by ^2 in. ; petioles not exceeding ^ in. Capitula 

 hemispherical, ^-^ in. long, numerous, in a panicled leafy cyme ; 

 peduncles slender, simple or branched, ranging up to 2 in. Outer scales 

 of the involucre linear-oblong, obtuse, entire, strigose-hispid outside, 

 lax, green, the length of the head ; inner ones glabrous or ciliate, 



