To2 - The Botanical Gazette. 
VII. Acknowledgment. 
The work for this article was done under the sil 
supervision of Prof. Wm. R. Dudley, then of Cornell Ut 
versity, and I have to thank him greatly, not only forth 
assistance he rendered me in looking up the literature of th 
subject, and especially in the collection of material, but a! 
for his ey supervision of the progress of the work. 
Chicago. *® 
EXPLANATION oF Priates II-IV. 
der: =, xylem; used: e¢, epidermis; c, cortex; ¢7, endode Ae da cc, central 
in oer: *;. xylem h, nl Z, e mage! de ocaly ptr 
ay pr, p oem; p ler ome; Fi perib cia dcawings: oe 
Bigrestne outline was fr lu 4 be 
The scale of magnification i + indicated with bis figures, the line 
bine the magnification of .7™™ for the lower pow of he mi ice ee 
-o1™™ for the higher powers. Of ‘on drawings of transections 0 
shown in figs. I to 25, two dr gs have ade of each secti 
Cc 
m m * and pf, the surrounding conn e parent , 
the enclosing endodermis, ev, and generally one or more rows of corte ; 
the other from a 3/in objective simply to show general ak of ol oe 
Bewehine Proportion of cortex and central cylinder, hence only part 
ar 
PLate 1 Figs, 1,3 ae oe var. agin a res 
Ranunculus circinatus.—Figs Ran Figs: 7 Rane 
culus hispidus.—Figs. 9, ro. Re et, ecco. Figs Mh 1 
dus, mont ¥ 
_* : 14: eee eyes aig 15, 16. ee oat 
ginjana.—Figs. 17, 18. Caltha palustris. —Figs. Acie. 2 an 
Actea spicata, var, nee gs 2, "23. se 
se. 
Piate IV.—Fig. 24. Clematis iia aaa shes root.—Fig. 25: bh 
young root, —Fig, 26. Cimicifuga race 
au oR 1 iets : m Novebo es 
- Ranunculus ng seo root t tip.—Fig. 32. igs onitam a 
foot tip.—Fig. 33. The sam . diagrammatic figur 
SAt the close of the two trike out 
preceding parts of this paper s Ch 
University of, as the author has no connection with the University of | 
