236 Mr.D. Dox’s Descriptions of new Genera and Species 
scales; and in the structure of its pappus. M. DeCandolle’s 
description and figure of this plant above referred to, are very 
faithful; but both he and Professor Lagasca, in adopting the 
name of Willdenow, who had referred it to Perdicium, were 
evidently ignorant of its being the Chetanthera serrata of Ruiz 
and Pavon. 3 
BICHENIA. 
Involucrum imbricatum. Flosculi radii labio exteriore multi- 
nervio! . Pappi radiis triplici ordine dispositis, apice peni- 
cillatis.. A 
Involucrum inadi inédivtat imbricatum : squamis lan- 
ceolatis, acuminatis, adpressis; intimis elongatis, radium 
cquantibus. Receptaculum planum, nudum. — Flosculi radii 
plurimi (15—18), ligulati, bilabiati, foeminei, staminibus 
sterilibus ;. labio exteriore amplo, cuneiformi, obtuse tri- 
dentato, coriaceo, glabro, multi-(10 v. 15)nervio ; interiore 
exiguo, membranaceo, bipartito : segmentis lineari-filamen- 
tosis, spiraliter revolutis; disci hermaphroditi, tubulato- 
bilabiati: labiis longitudine æqualibus ; exteriore ligulato, 
obtusè trilobo ; interiore bipartito : segmentis linearibus, ob- 
tusis, erectis. Filamenta linearia, complanata, nervo medio 
manifeste subcarinata. Anthere appendiculà ligulatà, mu- 
-cronulata, coriaceà terminate, basi bisete : setis ramulosis, 
plumosis, extremitate simplici, n ations clavatum, 
bilobum : lobis brevissimis, cr , conniventi-ap 
pruinosis. Achenia angusta, béinpreso-tetra pone undique 
copiose papillosa. Pappus pilosus, subpersistens: radiis 
ineequalibus, triplici ordine piu apice penicillatis, le- 
viter plumosis. | 
Herba: perennis, acaulis, cespitosa, land albá, villosd, molli, sicci- 
tate lutescent , omninó. induta. = Folia ferè Pedicularium 
quarundam, numerosa, radicalia, petiolata, interruptè bipin- 
natifida, 
ati Li 
