1693 
* DIPLOPÁPPUS incánus. 
' Hoary Diplopappus. 
SYNGENESIA POLYGAMIA SUPERFLUA. 
Nat. ord, Composit. Juss. (Introduction to the Natural System of 
Botany, p. 197.) 
DIPLOPAPPUS Cassini. Radius uniserialis femineus. Discus herma- 
phroditus. Pappus biserialis conformis. Corolla disci regularis. Achenium 
erostre. Herbe v. fruticuli Americani, Asiatici, v. Africani, folis alternis 
integris ; capitulis termipalibus, solitariis, colore vario tinctis Lessing. Synops. 
gen. comp. p. 163. , 
D. incanus; suffruticosus, foliis linearibus obtusis glauco-incanis semiamplexi- 
caulibus, caulis corymbosi ramulis unifloris, involucri squarrosi foliolis lineari- 
lanceolatis glandulosis. 
Herba perennis, suffruticosa, incano-tomentosa, subbipedalis, corym- 
boso-ramosa ; ramulis distanter foliatis monocephalis. Folia omnia linearia, 
incana, sessilia, apice mucronulata, patentia ; in ramulis Aoridis sensim eva- 
nescentia. Involucra hemispherica, squarrosa, bracteis linearibus, acutis, 
subglandulosis, interioribus erectis, basi "albidis apice herbaceis, Radius 
biseriatus, violaceus ; discus luteus. Pappus biseriatus, filiformis, pubescens ; 
serie exteriore abbreviata ; ovario tereti lanato. 
A handsome half-shrubby species, discovered in Cali- 
fornia by Mr. Douglas, by whom seeds were sent to the 
Garden of the Horticultural Society in 1832. 
It is easily known from D. linarüfolius and its allies by 
its hoary leaves, and soft flower-heads, which have the 
leaflets reflexed at the points in a sguarrose manner, and 
covered with minute semi-transparent glands. lts flowers 
are of a rich lilac, with a bright yellow disk. 
The species is rather tender, and should be protected dur- 
ing winter in a frame. In summer it grows freely in any 
hot, exposed situation, for which its Californian constitution 
particularly gualifies it. 
— 
* So called in allusion to the double row of pappus of the genus. 
