KEY TO THE FRENCH FORMS OF EUPHRASIA. 215 
from its point of origin it descends a little into the soil, then raises itself 
to become horizontal, and finally rises at its extremity to form the axis of 
the new bulb and to be finally continued as the new flower-stem. In its 
underground progress it bears small spiral scales, thick and fleshy, of which 
the first are slightly spaced, but those at the end of the subterranean branch 
growing closer and larger and forming thus the new bulb. From the in- 
terior portion of this rhizome, especially from the part that bears the lower 
scalesof the young bulb, thickish rootlets, upon the healthy 
tion of which the vitality of the new vegetation evidently depends. Lateron 
in the year the old bulb disappears, the horizontal rhizome becoming thus 
free; then the rhizome dies in the part which does not produce rootlets, 
and at the same time a new rhizome arises at the base of the bulb of the 
year, to form in its turn at its extremity another bulb to yield the flower- 
stem of the year following. There are produced then in these Lilies a 
hod 
at its base by a certain number of new leaves. This regeneration in the 
interior is accompanied by a correlative destruction at the exterior, so that, 
year a determinate number of 
scales, that is to say, of the bases of modified leaves; the number corre- 
: i stand 
renewing itself continually from the inside, may 1n this way last a number 
of years." —Duchartre, * Observations sur le Genre Lis, p. 18. 
ee 
A DICHOTOMOUS KEY TO THE FRENCH FORMS OF 
UPHRASIA. » 
Group 1.—Glandulose. Stem glandular-hairy, at least in the upper 
a or leaves glandular-hairy. Calyx always tomentose, usually glan- 
ular, 
* 
l. Flowers small, the tube of the corolla included in 
Tea MED ELI e LA. 
Flowers moderately large. . - - + + c o0 * 8 72 
