A Classification of the Varieties of Cultivated Oats 129 
Sterilis Selection (Plate VIII, 2, and fig. 22). — -Culms semi-erect in early 
growth, otherwise similar to those of A. s erilis nigra) sheaths, leaves, pan- 
icles, spikelets, and glumes similar to those of A. sterilis nigra, except that 
the glumes are shorter, ranging from 20 to 27 mm., and usually have 
fewer nerves, 8 nerves being common, although 7- or 9-nerved glumes are 
occasionally found; grains brown to brownish black, somewhat elongate, 
outer grains 18-22 mm. long, long-pointed; lemma glabrous, with. 7 obscure 
nerves; awn usually present on the outer grain but seldom on the inner 
grain, seldom twisted; basal hairs usually present, medium long (2-4 mm.), 
few to many; basilar articulation of the outer grain nearly solidified, 
although the lines of separation are usually evident ; rhachilla of the outer 
grain short (2-2.5 mm.), strong, glabrous, persistent to the inner grain. 
Plants 7-9 dm. tall; late in maturing. 
This variety was found mixed with several varieties of black oats of 
the A. sativa group. 
Red Rustproof (Plate VIII, 3, and fig. 22). — Culms, sheaths, leaves, pan- 
icles, spikelets, and glumes similar to those of A. sterilis nigra, except that 
the glumes are shorter, ranging from 25 to 30 mm., and have- fewer nerves, 
8 nerves being common, although 7 or 9 nerves may occur; grains brownish, 
yellow, somewhat elongate, outer grains 18-24 mm. long, long-pointed; 
lemma glabrous, with 7 obscure nerves; awn usually present on the outer 
grain, frequently on the inner grain, seldom twisted; basal hairs numer- 
ous, long (3-6 mm.), bushy; basilar articulation of the outer grain evi- 
dent; rhachilla of the outer grain short (2-2.5 mm.), strong, glabrous, 
persistent to the inner grain. Plants 6-9 dm. tall; late in maturing. 
Specimens of the variety Red Rustproof were found under the following 
additional names: Appier, Bancroft, Belgian Vinter, Dun, 100 Bushel, 
Red Algerian, Red Rustproof (Red Texas), Red Rustproof (Texas Red), 
Red Rustproof Selection, Regenerated Swedish Select, Swedish Select, 
Victor, White Maine. 
Burt (Plate IX, 1, and fig. 22). — Culms semi-erect in early growth, other- 
wise similar to those of A. sterilis nigra; sheaths, leaves, panicles, spikelets, 
and glumes similar to those of A. sterilis nigra, except that the glumes 
are shorter, ranging from 25 to 30 mm. ; grains dull yellow, elongate outer 
grains 18 mm. long, long-pointed; lemma glabrous, with 7 obscure nerves; 
awn usually present on the outer grain and frequently on the inner grain, 
seldom twisted; basal hairs usually present, numerous, short (1-2.5 mm.), 
