368 LXXiii. COMPOSITE (OLIVER AND HiEEN). [Geigerla. 



1. a. alata, Benth. et Hooh. f. Ge7i. PL ii. p. 337. Glabrous 

 dichotomous annual herb, about ^-1 ft. high ; branches widely alate. 

 Leaves opposite, oval-oblong, subacute, mucionate, not much narrowed 

 towards the base, sessile, decurrent, quite entire, membranous, 1-3^ in. 

 long by i-l in. wide, glandular- punctate. Capitula campanulate, ^ in. 

 long, sessile, solitary at tlie forks of the branches, 10-12-flowered, 

 with small foliaceous bracts at base. Scales of the involucre pauci- 

 seriate, oval-oblong, terminated by a subspinous awn, puberulous. Fl. 

 yellow.— DipZos^emma alatum, DC. Prodr. vii. p. 75. 



Nile Iiand. Gor Aoia.v\, Kotschy ! Cienkowsky. 



Occurs also in Arabia. . 



According to Schmnnfurth, the Abyssinian name of tins plant is Haschak. 



2. €r. acaulis, Bevth. et Hool\ f. Gen. PL ii. p. 337. Low-tufted 

 cottony herb 3-6 in. high ; stem very shortly branched or obsolete. 

 Leaves linear or oblong, crowded, subobtuse, apiculate, quite entire, 

 somewhat attenuate towards the base sessile, 1-3^ in. long bv ^-J m. 

 wide. Capitula ovoid, ^ in. long, subsessile, concealed by the bases of 

 surrounding leaves, solitary, densely cottony outside. Inner involucral 

 scales lanceolate, ciliate. Receptacle densely sappHed with long- 

 frino-ed fimbrillae. Achenes hirsute. Outer pappus paleaceous, scales 

 oval^ obtuse, not awned ; inner awned. — Diplostemma acaule and 

 Araschcoolla acaulis, Schultz Bip. in Hb. Kotsch. Nubic. n. 104. 



Nile Xiand. Cordofan, Kotschy ! Abyssinia, Hildebrandt, fideVatkein Oesterr. 

 Bot. Zeitschr. 1876, p. 327- 



50. ONDETIA, Benth. ; Benth. et Hook. f. Gen. PI. ii. p. 338. 



Capitula heterogamous radiate ; ray-florets 1-seriate ? . Involucre, 

 nearlv globose, of numerous oc -seriate laxly imbricate scarious glabrate 

 bract's. Paleie rigid. Corolla of ray with eUiptic or ovate minutely 

 toothed limb, of disk tubular 5-fid. Anther-base obtusely sagittate. 

 Achenes subterete silky- pilose. Pappus narrowly paleaceous, palese 

 subbiseriate unequal. — Much branched herb, puberulous or glabrate, 

 with alternate narrow leaves and solitary terminal capitula. 



A monotypic genus. 



1. O. linearis, Benth. in Hooh. Ic. PI. 1112. Decumbent diffusely 

 branching herb, suffruticose at the base, pale green, puberulous-glan- 

 dular, about 9 in. high ; branches narrowly alate above. Leaves linear, 

 acute, apiculate, sessile, narrowly decurrent, distantly denticulate 

 often obsoletely so, 1-2 in. long by -^^-^ in. wide. Capitula subglo- 

 bose, # in. wide by ^ in. high, solitary, sessile, with bract- like leaves 

 at base. Scales of involucre pluriseriate, scarious, obtuse or subacute, 

 rnucronate, cihate, otherwise nearly glabrous ; inner lanceolate, outer 

 successively short, outermost subrotund. Fl. subtended by linear- 

 lanceolate ciliate paleae longer than themselves. 



Soutli Central r 23° S, Lat. Used as a perfume, Chapman and Baines! 



