96 PITTONIA. 
L. coLLINA. Stems several from a large and dense rosette 
of basal leaves, racemosely branched toward the summit ; 
herbage canescent with a rather soft pubescence: rachis of 
the spike or raceme rather slender, the bracts small and 
narrow: nutlets densely white-tuberculate on all sides, and 
with a marginal series of about 8 stout aculez, these uncon- 
nected at base in one, in the other three connected and 
often somewhat inflated below. 
Species extremely unlike L. desertorum in foliage, pubes- 
cence, mode of growth, and of different habitat, but charac- 
ters of fruit less pronounced. I know the plant only as in 
the U. S. herbarium from Mareus Jones, who obtained it at 
various stations in Utah in 1894; one being Kingston, at 
5,300 feet; another, Pahria Cafion, same altitude. 
L. Montana. Erect, slender, branching only at summit 
and the spikes not elongated, the stem from amid a dense 
basal rosette of short elliptic-lanceolate leaves, the cauline 
foliage oblanceolate, the whole herbage cinereous with a 
pubescence mostly appressed: bracts of the short spikes 
small and inconspicuous: nutlets narrowly ovate, the disk 
very small for the nutlet, cireumscribed by a distinct though 
not very prominent cartilaginous entire margin, from along 
the inner base of which arise 8 or 10 short subterete aculez ; 
the surface of the nutlet on all sides rather coarsely muricate- 
tubercular. 
A very strongly marked species in the character of the 
nutlets; known to meonly in two specimens communicated 
to me long since, by the Rev. F. D. Kelsey, and collected by 
him at Helena, Montana, in 1887. 
L. FREwoNTEL. — ÉEchinospermum Fremontii, Torr. Pac. R. 
Rep. xii*, 46 (1860). Lappula cenchroides, A. Nels. Bull. 
Torr. Club. xxvi. 243 (1899). This species, well defined by 
Dr. Torrey almost forty years since, is usually a much larger 
