534 LXII. COMPOSITA. [ Coleocoma. 
decurrent. Flower-heads terminal and sessile within the last leaves or at the 
base of the lateral branches. Involucre 4 to 5 lines long, the bracts very 
broad, the inner ones with short broad scarious tips, jagged almost as in Cen- 
taurea.  Florets yellow (F. Muell). Achenes rather long, but much shorter 
than the involucre in our specimens, the tips of the pappus of the sterile 
florets slightly protruding. 
N. Australia. Sturt's Creek, F. Mueller. 
28. THESPIDIUM, F. Muell. 
Involuere ovoid, the bracts imbricate in several rows, dry, rigid, and acute. 
Florets of the Giteamfereince female, filiform, shorter than the involucre, 2- 
or 3-toothed ; disk-florets few or only one, her napi fertile, 4-toothed. 
Anthers with minute tails. Style bulbous at the base, the lobes nearly 
terete, papillose outside towards the end. chenes Wäer striate. - 
Pappus of 10 to 12 bristles, broad and chaff-like at the base , intermixed 
with a few small setaceous ones.—Low rigid herb. Leaves alternate, entire or 
toothed. Flower-heads fh ies densely clustered in the axils of the 
leaves and at the De of the s 
genus consists o ingle species endemic in Australia, It is closely allied to 
Neu differing God in habit and in the almost scale-like pappus 
or wi 
much above 1 in. long. Flow See, sons soltar or more frequently 
clustered in*the axils and. very due ely so at the base of the stem. iom 
lucre narrow, about 3 lines long. Female florets rather numerous, — 
the disk few or sometimes only o ne.  Achenes of the ray and of the E 
slightly contracted at the top and again risen into the pappus.—P —_ 
basifiora, F. Muell. Rep. Babb. Ex xped. 
. Australia. Islands of the Gulf of outa R. Brown; Port aee veni 
strong ; Upper Gilbert river, F. Mue 
TRIBE V. AmBRosizx.—Leaves alternate. Flower-heads strictly un 
wën Asien not united, 
29. XANTHIUM, Linn. 
mersed i in one of the cells of the involucral mass, the styles protruding wA 
filiform branches. Achenes obovoid, inclosed in the burr- pe invo 
