A Classification of the Varieties of Cultivated Oats 149 
outward; spikelets 2-grained; glumes dark green and somewhat glaucous 
at period of full heading, 20-25 mm. long, 9-nerved; grains white, plump, 
outer grains extremely short (usually 12-15 mm.), short-pointed; lemma 
of the outer grain glabrous, with 7 obscure nerves; awns numerous in the 
panicle, usually twisted, sometimes slightly geniculate; basal hairs wanting; 
rhachilla of the outer grain 2-3 mm. long, glabrous or with a few weak 
hairs. Plants 8-10 dm. tall; medium early in maturing. 
Another specimen of the variety Tobolsk was found under the name 
Wisconsin Pedigree No. 3. 
Silvermine Selection (Plate XVII, 1, and fig. 25). — Culms erect in early 
growth, medium large, stiff, hairy near the nodes; sheaths dark green and 
glaucous at period of full heading; leaves colored as the sheaths, medium 
wide, margins smooth; panicles of medium size, somewhat lax, the branches 
often drooping; spikelets 2-3-grained; glumes dark green and glaucous at 
period of full heading, 20-25 mm. long, usually 9-nerved, sometimes 
10-nerved; grains white, plump, outer grains 15-18 mm. long, short- 
pointed: lemma of the outer grain glabrous, with 7 prominent nerves; 
awns usually present, twisted and geniculate; basal hairs numerous, 
long (2-5 mm.), bushy; rhachilla of the outer grain short (1.5-2.5 mm.), 
usually glabrous. Plants 8-10 dm. tall; medium late in maturing. 
The variety Silvermine Selection was found as a mixture among several 
specimens of Silvermine and other white-grained varieties. 
C. I. 602 (Plate XVII, 2, and fig. 28).— Culms erect in early growth, 
medium large, stiff, glabrous; sheaths light green and glaucous at period 
of full heading; leaves colored as the sheaths, wide, margins smooth; 
panicles extremely long, wide-spreading, lax, drooping at the apex, the 
branches usually ascending; spikelets usually 2-grained; glumes light green 
and somewhat glaucous at period of full heading, 20-25 mm. long, usually 
9-nerved, sometimes 10-nerved; grains white, elongate, outer grains 17-22 
mm. long, long-pointed ; lemma of the outer grain glabrous, with 7 obscure 
nerves; awns usually present, twisted and geniculate; basal hairs usually 
wanting, if present few, short, and weak; rhachilla of the first grain 2-3 
mm. long, usually with a few weak hairs. Plants 9-12 dm. tall; late in 
maturing. 
Specimens of the variety C. I. 602 were found under the names Cana- 
dian and C. I. 597, and were also found as a mixture among several other 
varieties of white- grained oats. 
