GNAPHALIUM AND XERANTHEMUM. 549 
This plant is perfectly green, and entirely destitute of 
the woolliness so peculiar to this tribe of plants. The form 
and disposition of the palese are sufficient to distinguish it. 
The pappus resembles very much in structure that of the 
male of Leontopodium, and of some species of Antennaria. 
The generic name alludes to the smooth and green appear- 
ance of the plant, and is derived from sy, belle^ and ^A^^cj, 
viridis. 
HELICHRYSUM. 
Elichrysi et Gnaphalii sp. Willd. 
Involucrum imbricatum, scariosum, coloratum, conni- 
vens V. radiatum. Receptaculum nudum. Floscidi omnes 
hermapliroditi, tubulosi, 5-dentati. Anther ce basi biplu- 
matse. Stigma bipartitum : laciniis linearibus, apice in- 
crassatis truncatisque. Pappi radiis capiilaceis denticulatis 
V. apice peniculatis, basi connexis v. solutis. 
Herbae v. Frutices (Asia^, Africse et Americae) j)le7um' 
que niveo-tomentosi. Folia alterna, sessilia, paiula. Flores 
terminales^ solitarii v. corymbosi, aurei^ rosei, aid nivei. 
. The genus Heliclwysum^ as here limited, is distinguished 
by a naked receptacle, and a capillary seed-crown. It will 
thus include a large proportion of the Linnsean Gnaphalia. 
In my Prodromus Florce Nepalensis^ I had inadvertently 
united with this genus the Astelma of Brown, although the 
character there given could not include the latter genus. 
Jn several species belonging to Helicliri/sum we find the 
pappus has a striking analogy to the male pappus of Leon- 
topodium^ and to some species of Antennaria. I have fol- 
lowed Persoon in restoring the aspiration to the name ; Eli- 
chrysum^ adopted by Willdenow, being contrary to analogy. 
The following are the species belonging to this gonus, viz 
