368 LXXIII. COMPOSITH (OLIVER AND HIERN). [ Geigeria. 
1. G. alata, Benth. et Hook. f. Gen. Pl. ii. p. 337. Glabrous 
dichotomous annual herb, about 43-1 ft. high ; branches widely alate. 
Leaves opposite, oval-oblong, subacute, mucronate, not much narrowed 
towards the base, sessile, decurrent, quite entire, membranous, 1-33 in. 
long by 3-1 in. wide, glandular-punctate. Capitula campanulate, ¢ in. 
long, sessile, solitary at the 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. Fi. 
yellow.—Diplostemma alatum, DC. Prodr. vii. p. 75. 
Nile Land. Cordofan, Kotschy! Cienkowsky. 
Occurs also in Arabia. 
According to Schweinfurth, the Abyssinian name of this plant is Haschak. 
2. G. acaulis, Benth. et Hook. 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, 1-34 in. long by 4-} in. 
wide. Capitula ovoid, 3 in. long, subsessile, concealed by the bases of 
surrounding leaves, solitary, densely cottony outside. Inner involucral 
scales lanceolate, ciliate. Receptacle densely supplied with long- 
fringed fimbrille. Achenes hirsute. Outer pappus paleaceons, scales 
oval, obtuse, not awned; inner awned.—Diplostemma acaule and 
Araschcoolia acaulis, Schultz Bip. in Hb. Kotsch. Nubic. n. 104. 
Wile Land. Cordofan, Kotschy! Abyssinia, Hildebrandt, fide Vatke in Ocsterr. 
Bot. Zeitschr. 1875, p. 327. 
50. ONDETIA, Benth. ; Benth. et Hook. f. Gen. Pl. ii. p. 838. 
Capitula heterogamous radiate ; ray-florets l-seriate 2. Involucre 
nearly globose, of numerous oo -seriate laxly imbricate scarious glabrate 
bracts. Palew rigid. Corolla of ray with elliptic or ovate minutely 
toothed limb, of disk tubular 5-fid. Anther-base obtusely sagittate. 
Achenes: subterete silky-pilose. Pappus narrowly paleaceous, pales 
subbiseriate unequal.— Much branched herb, puberulous or glabrate, 
with alternate narrow leaves and solitary terminal capitula. 
A monotypic genus. 
1. O. linearis, Benth. in Hook. Ic. Pl. 1112. Decumbent diffasely 
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 yg-¢ 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, 
mucronate, ciliate, otherwise nearly glabrous ; inner lanceolate, outer 
successively short, outermost subrotund. Fl. subtended by linear- 
lanceolate ciliate palew longer than themselves. 
South Central? 23°S. Lat. Used as a perfume, Chapman and Baines! 
