74 Contributions to Western Botany. 
apparently allied to the tribracteatum group—minimum, 
meshes 2-23 by 1”, near the base they are almost regularly 
rectangular and vertical, 14-2 by 3-1’, outer membrane 1-14 
by 4-1” and mostly hexagonal and transverse; simillimum 
seems to be about the same; obtusum probably comes here. 
A3BC2D. Meshes with triangular ends and therefore hexagonal 
but ends much shorter than the sides, oblong to linear. 
A3BC2DE. Meshes vertical—parvum may develop such meshes 
at base, either the outer membrane or the main coat has 
meshes rectangular to hexagonal and 14-2 by 4’; parvum 
var. Brucee, meshes large, ¢ by 14-2’, near the base they 
are 2-3 by #-1”, outer coat 3-1”, and trausversely rectang- 
ular. 
A3BC2D2E. Meshes transverse. 
A3BC2D2EF. Leaves broad. 
A3BC2D2EFG. Plants of the Sierra region—anceps, meshes 32 
by 4” and linear, according to Watson 4-5 by 4-3’’; Lemmoni, 
ribs with a few lateral nerves, meshes 3-4 by 4-2” and linear 
to 2-24 by #-1” and oblong; ambiguum, meshes 3 by 1’, 
rarely 4 by 1”, near base2-3 by 1-14” and vertical; ribs with 
a few lateral] nerves. 
A3BC2D2EF2G. Plants of the interior from Utah to eastern 
regon and northward, meshes oblong—anceps var. aber- 
rans, meshes 24-3 by 1’; Brandegei, meshes 3 by 3-1’, also 
24-3 by 3-1”, the form called miser has meshes 14-3 by $-%”. 
A3BC2D2E2F. Leavesnotbroad. Plants of the Utah to eastern 
Oregon region except tribracteatum—tribracteatum, meshes 
according to Watson with the upper side longer than the 
lower and ends ofien rounded, about 3 by 14”; tribracteatum 
var. Diehlii, meshes symmetrical, 3-4 by 4”, sometimes 3-44 
by 1-14”; macrum, meshes 4-5 by 3”, ribs with few lateral 
nerves, the form of this called Nevii has meshes # by}-1”. 
