Plerigeron.] LXII. COMPOSITA, 533 
narrowed towards the base, not decurrent. Flower-heads broadly ovoid, 
about 3 in. long, the inner involucral bracts very acute. Florets numerous, 
hot exceeding the involucre, those of the ray scarcely so long, with a small, 
narrow, entire or bifid concave lamina. Achenes less hairy than in P. ligu- 
latus. Pappus almost plumose. 
N. Australia. Sturt's Creek and Fitzmaurice rivers, F. Mueller, 
6. P. adscendens, Benth. A diffuse, ascending or erect, very much 
branched herb, with a hard almost woody base, glabrous or pubescent. Leaves 
linear or linear -oblong, narrowed into a petiole, “entire or slightly toothed, not 
decurre Flow er-heads numerous, rather smaller than in P. odorus. 
v but not always surrounded by a few 
floral leaves. Florets more numerous than i in P. odorus, those of the ray fili- 
orm, scarcely so long as the i Weeds with 2 or 3 short linear lobes. 
Bees ». very siet denticula 
ensland, een Roper, and een rivers, F. Mueller ; Cape river, Bowman ; 
“Sara river, Miichel 
1. P, £lifo olius, Benih. A soo erect, glabrous annual with filiform 
| lichotomous branches, attaining about 6 in. Leaves filiform, all entire in 
our specimens, mostly 3 to 1 in. bur. Flower-heads solitary or in clusters 
of 2 Inv olucre narrow, 4 to 5 lines long, the bracts rigid, the inner 
| ones very acute.  Florets usually 3 or 4, of which 2 or 3 female, slender, 
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shorter than -the inv olucre, 2- or 3-lobed at eg top, and apparently one or 
‘ometimes none, hermaphrodite or male, but with the corolla already fallen 
off in all the Bos ds I have examined, eeng very silky-villous. Pappus 
Yither shorter than mg involucre, of numerous unequal bristles, some almost 
Plumose, some enti — Oliganthemum iiem. £ Muell. Herd Pluchea 
filifolia, F. Muell. in Trans Phil. Inst. Vict. iii 
Queensland. Salso a plains, near the Roper river, 5 Muel ller. —The specimens are 
» and I have not meh y iu finding any of the stamen-bearing corollas. i 
27. COLEOCOMA, F. Muell. 
_Tnvoluere ovoid, the bracts imbricate in several rows, dry, with slightly sca- 
tious t tips. Rece ptacle flat, domes scales.  Florets all tubular, those of the 
: circumference slender, female, o 5-toothed; disk-florets several, herm 
bs Plrodite, sterile, 5-toothed. e ind tailed. Style of the disk-fiorets usually 
ndivided. Achenes striate, somewhat compressed, those of the dis k abor- 
ited in a lone tube, j : 
» jagged'at the end 
l kel bas € bas —Low rigi id he rb. Leaves alternate, usually toothed. Flower- 
3 s termina] or lateral. 
only +, 5805 Consists but of a single species, endemic in Australia, differing from Pterigercn 
x y in the pappus 
Gre .19. Alow, rigid, 
urea, F. Muell. in Hook. Kew Journ. ix 
n branching herb, perhaps annual, although almost woody at the base 
AIT specimens quite g Jabrou us. Leaves linear or lanceolate, acute, with a ew 
Gi acute teeth, oniricted at the base, but the upper ones sessile or slightly 
