— 
106 Gray, Characters of some 
Rocky Mountain region, viz. Townsendia ; — a genus found- 
ed by Hooker upon a single species, but to which Nuttall 
has since added four more, and still others will doubtless 
reward the exertions of future explorers. The present addi- 
tion (Townsenpia Fremonru, Torr. & Gray, ined.) resem- 
bles T. incana, Nutt. but has longer and narrower leaves, and 
larger heads even than T. sericea, Hook. The bristles of the 
pappus are also somewhat scariously fringed towards the base, 
so as to become almost squamellate. Somewhere in the 
vicinity of this genus, we must place a dwarf, annual, daisy- 
like plant, of very remarkable characters, which I now pem 
to describe. 
MONOPTILON, Torr. & Gray, ined. 
Composite-Asteroidee : Subtr. Asterinew : Div. Asteree. 
Capitulum multiflorum, heterogamum; floribus radii 1-se- 
rialibus ligulatis foemineis, disci tubulosis hermaphroditis, om- 
nibus fertilibus.  Involucrum fere uniseriale Erigerontis. Re- 
ceptaculum convexum, nudum. “Corolle tubus radii et disci 
sparse hirtus: ligule obovato-oblonge. Styli Asteroidea- 
rum; rami fl. hermaph. appendiculo triangulari obtuso ter- 
minati. Achenia oblongi-obovata, leviter obcompressa, spat 
sim hirtella, binervia (ad margines) vel in radio trinervia. 
` Pappus conformis, duplex; exterior e coronula brevissime 
crenulata persistente; interior, seta. capillaris unica, caduca. 
discum adzquans, basi scabrida, apicem versus sensim clava- 
timque plumosa! — Herba annua, exigua, depressa, villoso- 
pubescens ; ; foliis sparsis oblongo- vel lineari-spathulatis, inte- 
gris; capitulis subsessilibus vel bracteatis. Flores disci flavi: 
ligulæ ut videtur albæ, cæruleo vel lilacino tinctæ. 
M. sELLIprroRMIS, Torr. & Gray. (Tab. XIH. Fig. 1-6) 
We are unable to give the locality of this highly curious 
ns the number attached to the specimen having been ! 
It was probably gathered in the southern ranges of the Rocky 
