CHARACTERS OF SOME GNAPHALIOID COMPOSITA. 173 
cavis scariosis exappendiculatis, nervo viridulo brevi apice dilatato 
dorso lanigero, constans. Flores hermaphroditi, conformes. Corolla 
tubo gracili (basi vix aut ne vix skirroso-tumido), limbo infundibulari 
5-fido, lobis lanceolatis recurvis. Anthere basi subcaudatæ. Styli 
rami apice truncato-capitellati. Achenium obovatum, glaberri- 
mum, pellicula hyalina humectate valde tumescente gelatinosa tec- 
tum. Pappus corolam subæquans, caducus, e setis mollibus 8-10 
laxe plumosis apice tenuissimis basi subdilatatis in annulum mem- 
branaceum concretis.—Herba annua, multicaulis, bi-triuncialis, laxe 
lanata, caulibus ramisve simplicibus foliosis glomerulo aphyllo ter- 
minatis, foliis alternis anguste linearibus apice subdilatatis mucrone 
apiculatis. Squamee fuscæ. 
B. Drummondii. 
Swan River, Drummond.—Most allied, perhaps, to Styloncerus, but 
with a very different pappus, corolla, general receptacle, &e., the glo- 
merule not foliose-bracteate.* The generic name alludes to the cellular 
pellicle of the achænium becoming gelatinous when moistened, as in 
Cephalosorus phyllocephalus, but even more strikingly. This pellicle 
consists of a close coating of linear or subclavate diaphanous cells, 
compactly arranged with their long diameter perpendicular to the 
smooth brown pericarp: on the application of water it promptly swells 
into a mass of transparent jelly, very much thicker than the enclosed 
achenium. The gorged mucous cells remain unbroken for a consi- 
derable time, and their extremely delicate walls show no markings, nor 
any contained coiled bands or fibres. 
ANTHEIDOSORUS, nov. gen. 
Capitula uniflora, super receptaculum generale planum arcte sessilia, in — 
glomerulum hemisphzricum involucro generali pluriseriali radiante — 
cinctum, capitulum simplex multiflorum prorsus mentiens, den- 
sissime aggregata. Jnvolucri generalis squamæ scariosæ, oblongæ vel 
obovate, inferne appressæ, fere omnes appendice petaloidea aurea — — 
dilatata abrupte patente superatæ. —mvolucrum partiale e squamis 
paucis (3-5) oblongis vel linearibus, hyalinis, planiusculis, subper- 
sistentibus, floribus brevioribus, paleas receptaeuli generalis simu- 
* The tube of the very short corolla of Styloncerus humifusus becomes tubercu- Sod 
late, thickened, and indurated, as in Skirrophorus. 
