270 SOUTH-WEST AUSTRALIAN COMPOSITÆ. 
Swan River, Drummond.—Stems four to six inches high, slender. 
Cauline leaves 1-2 inches long. Heads 3 lines long, solitary or 
geminate at the summit of the stem or of the simple filiform branches. 
Exterior scales of the 10—12-flowered cylindraceous involucre ferru- 
gineo-fuscous, chartaceo-scariose, ovate, acuminate; the inner tipped 
with a short and yellow radiant appendage. Achenia and pappus 
smaller than in P. pygmaeus and P. Drummondii; the setæ not more 
rigid, but with a shorter plume. 
9. P. ramosus (n. sp.): subglaber ; caule ramosissimo erecto; ramulis 
apice 2—3-cephalis foliisque lineari-filiformibus subglutinosis; invo- 
lucro demum campanulato extus foliis pluribus brevibus arcte brac- 
teatis; squamis intimis appendice oblonga conspicua radiantibus. 
Swan River, Drummond.—Stems 6-10 inches high, slender. Heads 
rather smaller than in the last, 15-flowered. The bracteant leaves are 
appressed, and imitate an external involucre; the proper involucral 
scales are pale, in few series; the inner bearing a yellow radiant ap- 
pendage of its own length. Pappus with a rather shorter plume than 
in the preceding. 
ACROCLINIUM, nov. gen. 
Capitulum. multiflorum ; floribus omnibus tubulosis hermaphroditis, 
marginalibus fertilibus cæteris plerisque abortu ovarii sterilibus. Zn- 
volucrum late campanulatum pluriseriale ; squamis exterioribus char- 
taceis breviter scarioso-appendiculatis, interioribus appendice petaloi- 
dea radiantibus. Receptaculum e basi lata acute conicum vel in cen- 
tro subulato-productum, epaleatum, scrobiculatum, ambitu subalveo- 
latum. Corolle conformes, infundibulari-tubulose, 5-dentate. An- 
there basi breviter bisetæ. Styli rami fl. fertil. apice truncati bre- 
vissime penivillati ; fl. sterilium similes sed breviores vel brevissimi. 
Achenia fertilia turbinata, pilis prælongis confertissimis niveis sericeo- 
villosissima, sterilia exteriora sericea, interiora sensim inania glabrata ; 
callo basilari obliquo. Pappus persistens, e paleis setiformibus rigidis 
10-20 basi subconcretis, fl. fertil. dense plumosis ; fl. steril. tenui- 
oribus sepius paucioribus (6—12) minus plumosis apice nudis vel 
penicillatis.—Herbæ humiles, haud lanatæ ; caulibus e radice annua 
plurimis simpliciusculis adscendentibus foliosis apice monocephalis, 
foliis alternis linearibus ; capitulis majuseulis. 
$ I. Pappi paleæ apice nigricantes, fl. fertil. ad apicem usque dense plu- 
