ORGANS OF SOME CALIFORNIAN LILIACEAE — 409 
ive outer cortex in its totality, in consequence of the shortening, 
loses its light connection with the active tissue beneath, becom- 
parated from it by the formation of the zone of com- 
sed cells already mentioned. Hereupon the root-surface, 
fight and smooth at the beginning, becomes slack, rough, and 
d, and the whole root diminishes somewhat in thickness. — 
inkles begin to show themselves in March, when the roots 
© 10™ long, still growing and without ramification. This 
led region, very insignificant in the first roots of the young 
ant, acquires in older specimens a length of about 2°". 
TRILLIUM OVATUM Pursh. 
im ovatum lives in the same localities as Scoliopus, and 
manner of life resembles this species ! in many respects. es 
ce of organization between both, noticeable even a . 
ling, i is that in Trillium the rhizome is used in a higher 
Toots ina less degree as ie than i in ee 
ga a very few: branches, contains ay a 
grains, its central cylinder is 3-archic, the eae 
with slight thickenings, remaining there ast thi 
ells in front of the hadrome, the ical 
oe e chy podermis very distinct. ar 
traction in the root te : 
