258 BOTANICAL GAZETTE, 
gnema, Spirogyra longa, S. inflata, 8. conspicua, and S. punetata, 
illustrating an increasing sexual differentiation, that culminates 
in Sirogonium sticticum, in which there is not only a difference 
between the mother cells of the gamete, but a difference in size 
between the latter after their renovation previous to union. 
_—_ 
Some New Grasses. 
BY GEO. VASEY. 
more scabrous above; palet + to % shorter than the glumes, 2- 
toothed at apex, 2-keeled, the keels ciliate. 
is is one of those species which may with almost equal pro- 
priety be classed in Elymus or Agropyrum. The narrow rigid 
glumes, and the general position of the spikelets seem best to re- 
fer if to Elymus, although in the weaker plants the spikelets are 
single. 
Collected near San Diego, California, by C, R. Orcutt. 
AGROPYRUM TENERUM.—Culms in tufts or patches, without 
running rootstocks, apparently annual, about 3 feet high, erect, 
smooth: leaves narrow, one or two lines wide, 3 to 6 inches Jong ; 
sheaths striate, smoothish ; ligule short: spike slender, eylindri- 
cal, 4 to 6 inches long, one or ttvo lines wide, with the spikelets 
$ to inch distant, sometimes wider and with the spikelets 
~ * * . ? * : 4 
6 lines long, rigid, lanceolate, acute or awn-pointed, etrong 
5-nerved ; flowering glumes lanceolate, acute, 4 to 5 lines 1008) 
*. 
