A Classification of the Varieties of Cultivated Oats 155 
whorl of branches; awns when present on the outer grain only, and often 
wanting; basilar articulation of the grains solidified, as in A. sativa. 
(Plate III, 1.) 
Key to varieties 
A. Grains dark-colored, black, brown, or gray. page 
B. Ligules and auricles wanting. 
C. Awns numerous in the panicle; rhachilla of first grain 2-3.5 mm. long, 
sparsely haired; grains elongate Garton 748. 155 
CC. Awns wanting or seldom occurring; rhachilla of first grain 1-2 mm. long, 
glabrous; grains plump Garton 784. 156 
BB. Ligules and auricles present. 
C. Grains gray; rhachilla of first grain 1.5-2 mm. long, glabrous; culms usually 
sparsely haired near the nodes Garton Gray. 156 
CC. Grains black to brown; rhachilla of first grain 2.5-3.5 mm. long, sparsely 
haired; culms glabrous Black Tartarian. 157 
AA. Grains light-colored, white or yellow. 
B. Ligules and auricles wanting Golden Giant. 157 
BB. Ligules and auricles present. 
C. Outer grains remarkably short, rarely exceeding 15 mm. in length; spike- 
lets confused in attitude (pointing in all directions) Sparrowbill. 158 
CC. Outer grains ranging between 16 and 20 mm. in length, rarely less than 15 
mm. ; spikelets drooping or pectinate in attitude. 
D. Nerves in the glume 11-13; branches of the panicle not appressed, usually 
drooping from the middle outward Garton 585. 158 
DD. Nerves in the glume 8-10; branches of the panicle appressed. 
E. Panicles thickly branched and fruited, compact and stiff, the lowest 
whorl of branches issuing from a bend in the rhachis at which the 
nodal diaphragm is wanting or rudimentary; margins of leaves 
ciliate; double-grains very numerous. 
F. Basal hairs wanting; nerves of the lemma 8-10; spikelet usually 
double-grained Storm King. 159 
FF. Basal hairs frequently present; nerves of the lemma 7-8; spikelet 
in about equal numbers double-grained or normal . . Tartar King. 160 
EE. Panicles sparsely branched and fruited, elongate, slender, lax, droop- 
ing, the lowest whorl of branches issuing at a normal node; margins 
of leaves glabrous; double-grains few. 
F. Awns rare; 3-grained spikelets rare White Tartar. 161 
FF. Awns numerous in the panicle, usually present in each spikelet; 
3-grained spikelets frequent Green Mountain. 162 
Descriptions of varieties 
Garton 748 (Plate XX, 2, and fig. 30). — Culms erect from early growth, 
medium large, coarse, glabrous; sheaths dark green and somewhat glaucous 
at period of full heading, fully covering the internocles; leaves colored as 
the sheaths, medium wide, margins glabrous; ligules and auricles wanting; 
rhachis barely flexuous; panicles unilateral, short, stiff, sparsely branched 
and fruited, the branches appressed, the lowest whorl of branches always 
issuing from a normal node; spikelets pendant or pectinate in attitude, 
