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 336 PLANTS OF CENTRAL AUSTRALIA

few cases both in Grevillea and Hakea, but which I beheve to be important, as it not only expresses a difference of form, but also in general of vascular arrangement.

25. Ptilotus {latifolius) capitulis giobosis, bracteis pro- priis calycem snperantibus, foliis ovatis petiolatis.

Loc. " In lat. 26° S." D. Sturt.

Desc. Herba diffusa, ramosa, incana. Folia alterna, petiolata, late ovata, integerrima. Capitula ramos termi- nantia^ solitaria vel duo approximata. Bracteae laterales scariosse, sessiles, late ovatse, enervisc. Perianthium ; foliolis snbeequalibus, lana implexa alba basi tectis, ante expan- sionem ungue nervoso tunc brevissimo, post anthesin laminam scariosam enervem fere sequante. Stamina 5 antherifera ; filamenta basi in cyathulum edentulum con- nata. Antheres biloculares, loculis utrinque distinctis medio solum conjunctis. Ovarium monospermum, glabrum. Sty- lus fihformis, glaber. Stigma capitatum, parvum. Utri- culus evalvis; ruptilis.

Obs. I was at first inclined to consider this plant as a genus distinct from Ptilotus, more, however, from the re- markable difference in habit than from any important dis- tinction in the flower, for its character would have chiefly consisted in the great size of its lateral bractese, and in the form of its antherae.

In a small collection formed during the voyage of Captains Wickham and Stokes, there is a plant very nearly related to, and perhaps not specifically distinct from, Pti- lotus latifolius, but having narrower leaves. It was found on one of the islands of Dampier's Archipelago.

89J 26. Neurachne [jjciradocva) glaberrima, culmo dicho- tomo, foliis rameis abbreviatis, fasciculis paucifloris, glumis perianthiisque imberbibus valvula exteriore cujusve floris septemnervia.

Loc. Nulla indicatio loci v. stationis^ in Herbario D. Sturt.

Desc. Gramen junceum, facie potius Cyperacese cujusdam. Polia radicalia in specimine unico viso defuere ; ramos sub-

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