WILSON: ANATOMY OF ALFALFA. 299 



TABULATED CELL DIMENSIONS IN MM. 



ROOT. 



Longitudinal 



C'fOJis section. section. 



Endodeimis 01 x .017 



Phloem parenchyma 0052 x .005 



Water tubes 012 x .012 



STEM. 



Epidermis, outer 012 x .008 



Epidermis, inner 01 x .007 



Stomata, guard cells 02 x .0075 



Hairs, elongated, basal cells 021 x .021 



Hairs, elongated, tip cells 014 x .014 .014x.7 



Hairs, glandular, neck cell 008 x .008 .008 x .04 



Hairs, glandular, tip cell 016 x .016 .016x.04 



Chlorophyll cells 009 x .009 .009 x .01 



Strengthening cells at corners 008 x .004 



Sclerenchyma sheath cells 017 x .02 



Pith cells 04 X .04 .04 x .05 



Sclerenchymatous parenchyma 015 x .015 .01 x .015 



Xylem tubes 017 x .017 



Xylem parenchyma 005 x .005 



Sieve tubes 004 x .004 .004x.032 



Bast fibers 012 x .01 .012 x .25 



LEAF. 



Epidermis 03 x .015 



Palisade cells 015 x .015 .04 x .015 



Tracheids 015 x .015 .015x.O8 



Spongy parenchyma 021 x .017 .021x.02 



Border parenchyma 03 x .03 .03 x .022 



