450 TRANS. OF THE ACAD. OF SCIENCE. 
3. J. teENvIs, Willd., is one of the most common and best 
elp : 
fineaiaes seeds, with distinct but sI ort, whitis pe nk ; 
eat are very “simi ar - those of J. effusus, and are mostly 
g. 
_Novwitstanding the pun variability in the size of the plant 
a few inches to two feet), in the size and development 
of the one, two, or even three spathes, and in the size and full- 
ness of the inflorescence (1-5 or 6 inches in ves I can 
distinguish only ae following well marked varietie 
eg ramis panicule spatham eats, 
aa incurvis ; Gia minoribus secundis.—J. secundus, 
Va ar.y. congestus, ramis panicule spatha brevioribus abbre- 
viatis ; floribus fere in — congestis ; sepalis fusco-stri- 
atis ; capsula e stramineo fus 
The legitimate J. tenuis is on over the whole country, 
(San Francisco, paride Rdgh Monters Fes eer) and in Colo- 
rado, Hall, is very striking ; its apparent heads, 4-9 lines in 
wi rk t 
rieties are undistinguishable from ‘those of the common 
nt. 
. J. picnoromvs, Elliott, Sketch, 1,406; Chap. Flor. 493 ; 
cane closely allied to the pre eceding, is a well marked 
species, and would not have so often been pag aes with 
it, if the characters, as given by Elliott, had not been over- 
looked. The terete eaves, which are marked it a shallow 
groove on their upper side, distinguish it at once, even when 
o tewkcins are only apparently ae axes, for in reality mer 
are pics. of many short, successive branches. 
