CATALOGUE. 423 
Page 168. Simsia' canescens, Gray. PL Fendl 85. Stem leafy below 
or at the base only, tlic long brandies nearly naked; leaves nearly s(\ssile, 
obovate or somewhat rhomboid, nearly entire, scabrous-canescent on both 
sides; heads on long peduncles; involucre wide, of few herbaceous 
linear scales, densely covered with long white liaii-s; rays very ]ai-<r,', wrdiiv- 
obovate, obscurely 3-lobed at the apex, the tube long and sleiidci- ; acliciiia 
oblong-wedge-shaped, villous with silvcry-whife hairs, e,s|H'cia!Iy aloiiii' \\u- 
edges, and bearing 2 linear-subulate villous awus nearly as long as Hi." (li>k- 
corollas. — California and Arizona. Three other i IclianI lioid ])lanls oeenr in 
Dr. Palmer's collection. One of them, having Ihe aelicnia de.slilule ol"])appns, 
and with opposite linear revolutely nuirgined leaves, is i)()ssii)ly a JrcJiowrris. 
Another, not in flower, is perhai)S an EnceUa. 'i'lie lower leaves are opposite, 
petioled, ol)long-lanceolate, .'l-nerved, obscurely toothed, and seabrons-canes- 
cent on both sides. The third seems to be au undcscribed Tlthmia. 
TiTHONlA^ ARGOPiiYLLA. Silvcry-wliit(^ with a velvety ])n!)es('eiice; 
radical leaves 2-3' long, 1' broad, softly coriaceous, rhond)oi(l-obova1(>, entire, 
3-nerved, narrow^ed into a petiole nearly as long as the leaf, (stem-leaves not 
seen;) heads more than V broad; involucral scales rigid, imbricated in many 
rows, at length reflexed ; receptacle flattened-hcmispherical ; chalf with sea- 
rious margins, conduplicate and partly inclosing the compressed olilong- 
wedge-sliaped silky-villous achenia; pappus of 2 short smooth rather stout 
awns, and an intermediate very short lacerate-fringed mend)rane. — Onlv a 
tuft of radical leaves and a single head have been (examined. Dr. Palmer (h>- 
scribes the stem as erect, 2-3° high, leafy, with the cauliiu^ leaves similar lo 
the radical ones. The plant seems to l)e as near to Jlg/dera as to Tdfwnia, 
and indeed the information comes from Dr. Gray that the two irein ra are to 
be united by Mr. Bentham in his revision (tf the Co/iqwsiia- for the ilnnni 
Plantaruni. 
1 SIMSIA. Ti:i;s. A j^'mns |,i lhJ:oiilluis,},\]t with t lie in\ mi n..! iiiiliri( alcil. .-iinl lln- 
pappus consist i II j;- only <ii' 'I vulhrr stout .•iwns, \\iii<-li, Ihiwi-mt. avi' waniini^ in (,uc sjn i ir.- oi' tin- 'r.-nu- 
'■^TITHONIA. ])i:-r. Hi.kU in;niy-tl<i\\ rvcd, radiair : tlir iay>^ li^iilatf, unit ral : (li-k-||i,\vcr> pi r 
feet, t lie con illa ."i-flcl't. (lu' lubr lallin- sliort, iiillatr<l almvc. Invulucrc iniliricatnl : llic scales inal.-. 
vi!4i<l, with olitlisr Icaly ai)in'ii(la;;vs. !,'(■( ( ptai lr i-onvcx. the r-lialT laiiccdlali'. iiii'iiilM-aiiaiTiiii>. ami iimi,- 
or li-ss <'iiiliracinn- tlic a>-lifi:iuiii. liraiiciics ol' the style witli cxs.-rf <•(! iiisj,i<l snhulatc ripin-mlaui-. A.lir- 
iiia of till' ray t lian^nnlar or oI)ro!iii>ri'SM-<i. ]>ii]ii»iis scanty, very slim-t. of the disk e()!n|irc--.eil i.r ^n],- 
tctra-onal. smooth or hairy, crowned with 1--.' awns iVHUi the stron^ei- aiit;h-s. al lea-t in l!ie central 
Iloweis. and hearinj^ a siii;;le seiii s of miimrc denticulafc s(|iiaiiiell;c. (whicli in thi' sjiei ies ahove de- 
scrihed ;ii-o united into a filiate cio\^-|i.)— Aiiu i ic;ni hei l.s, with oj.jioMfc ,,r .-lU -rnate fri]dincr\ ed h'a\ ('s 
and yellow liowers. (Cliaracter mostly from Jh Ciunlolh.) 
