184 Rhodora [OCTOBER 
C. Corolla deep brownish-purple or chocolate-color: nodes below the 
head 4-9. 
Leaves glabrous: nodes below the head 4-7...... 2. O. Williamsii. 
Leaves pubescent: nodes below the head 5-9. 
(2. E. Williamsii, var. vestita. 
B. Inflorescence becoming loose and elongate, flowers or capsules scat- 
tered, the mature spike with many remote bracts. D. 
D. Leaves glabrous on both surfaces: corolla deep purple to cream- 
BENE Lesen cu weet EAS Cs cee Oe 3. E. purpurea. 
D. Leaves pubescent on both surfaces. 
Leaves sparingly crisp-pubescent on both surfaces, the primary 
ones 5-18 mm. long: corolla deep purple (rarely whitish) with 
qub TOME Bivins 00 cde (3. E. purpurea, var. Randii. 
Leaves very densely pubescent, the primary ones 2-7 mm. long: 
corolla whitish (rarely purple). 
(3. E. purpurea, var. Farlowii. 
A. Upper lip of corolla plainly bilobed; the lobes somewhat reflexed from 
the base (not revolute), truncate, and from undulate to coarsely 3-toothed: 
lower lip in larger forms fan-shaped, spreading and very conspicuous: 
flowers rather large, 4-10 mm. long: bracts with acute or acuminate, 
rarely obtuse, teeth. E. 
E. Bracts with acute or obtuse teeth: leaves pubescent. F. 
F. Inflorescence nearly capitate, in maturity with the 1-3 lower pairs 
of braets remote: teeth of braets obtuse: leaves very pubescent: 
oook OO wi NE... ao eee eie 4. E. mollis. 
F. Inflorescence spicate, becoming loose and elongate: teeth of bracts 
acute: leaves very pubescent to almost glabrous. 
Internodes long: inflorescence open, the lowest bracts in maturity 
2-5 em. apart: bracts spreading: corolla 4—5.5(-6) mm. long 
5. E. disjuncta. 
Internodes short: inflorescence dense above, the lowest bracts in 
maturity 0.5-2 em. apart: bracts ascending: corolla 5-7 mm. long 
6. E.arctica 
E. Bracts with subulate or bristle-tipped teeth: leaves pubescent or gla- 
brous. G. 
G. Spikes comprising the larger portion of the plant, beginning near 
the base of the stem and branches. H. 
H. Corolla 5-6.5 mm. long, with pale-lavender or bluish lines; 
the lower lip with the lateral lobes not strongly spreading. . 
Bracts oblong, pubescent: branches strongly ascending. 
7. E. hudsoniana. 
Bracts orbicular or broadly oval, glabrous: branches arcuate- 
een PERI E A cs 04s eae 8. E. canadensis. 
H. Corolla 6-8 mm. long. with dark-purple lines; the lower lip with 
wide-spreading lateral lobes. 
Js ERDIOUS. |. er vE LER ks hc Se CE 26 9. E. stricta. 
Bracts pubescent.............. (9.) E. stricta, var tatarica. 
