458 LXXIII. COMPOSITE (OLIVER AND HIERN). [ Centawrea.. 
5. ©. rhizocephala, 0. § H. An erect granular-hirsute stiff 
herb, 1-2 ft. high, from a shrubby stock. Cauline leaves oval-oblong, 
obtuse, sessile, rounded at the base, scarcely auriculate, 3-5 by about 
1 in. Capitula urceolate-campanulate, 1-14 in. long including the 
florets, on pedicels 3-2 in. long, 3-9 together, in simple or compound 
trichotomous cymes at the end of short radical or subradical shoots. 
Involucral bracts deltoid or the inner ones deltoid-oblong, glabrous, 
terminating with an appendix bearing 3-5 short spines. Ligule of 
ray-florets white; disk-florets rose-coloured. Achenes glabrous. 
Pappus about +, in. long ; sete stout, compressed, acute. 
Nile Land. Bongo-land. Ssabbi, on the burnt steppes, flowering for the 
second time, Nov. 20, 1869, Schwetnfurth ! 
A small specimen, perhaps flowering for the first time, with a head 14 in. long 
and young undeveloped leaves, collected by Petherick, probably by the White Nile, 
may belong to this species. 
6. ©. preecox, 0. § H. Erect perennial herb, branched below 
from a woody stock, 1-2 ft. high; branches obsoletely cottony above. 
Leaves linear, acute, rigid, white-cottony when young, glabrescent, 
sessile, not auriculate, ranging up to 8 by } in.; margins revolute, ob- 
soletely denticulate. Capitula campanulate, urceolate in fruit, about 
2-1 in. long, on radical or subradical and occasionally cauline peduncles 
ranging up to 2 in., which usually appear just above the soil before 
the leaves. Involucral bracts deltoid or oblong-deltoid, glabrous, ter- 
minating with an appendix of 3-5 palmately set slender spines, the 
longest of which is about 1-1 in. long. Flowers yellow and bluish. 
Achenes glabrous, thick, about 3 in.long. Pappus yy in. long; set@ 
stout, compressed, acute. 
Upper Guinea. Niger, Joruba, on stony hills, Barter! 
7. G. Hochstetteri, 0. § H. An erect, whitish, puberulous oF 
cottony, branched herb, more than 2 feet high. Branches striate, sul- 
cate below. Stem-leaves pinnatipartite or pinnatifid or the uppermost 
ones subentire, sessile or nearly so, not auriculate, 14-4 in. long; lobes 
linear or oval, the terminal one largest. Capitula campanulate, about 
ra in. long (exclusive of the ray-florets), on pedicels ranging up 
in., In open terminal cymes. Involucral bracts appressed, hnear- 
lanceolate or the outermost lanceolate and successively shorter, thinly 
arachnoid and scabrid, terminating in a black acute hard quite entare 
apiculus. Florets purple. Achenes setose at least above, ¢ in. long, 
obscurely ribbed. Pappus paleaceous, erect-patent, obtuse, as long as 
the achenes. — Amberboa abyssinica, A. Rich. Fl. Abyss. 1. P- 45 
A. Hochstetteri, Buchinger in litt. ad Hochst. (Herb. Schimp. Abyss- 
ed. Hohenacker. a.p. 1854, n. 2183). 
Wile Land. Abyssinia, alt. 5,700-6,000 ft., Schimper ! Ouodgerate, Petit ! 
8. GC. somalensis, 0. § H. Branches white, obsoletely tomen 
tose below, cottony above. Leaves obovate (or the upper ones oblan- 
ceolate or linear), pinnately toothed and some lobed, puberulons-glan- 
dular on both surfaces, narrowed towards a sessile base or the lower 
