

1901] ERIOCAULON DECANGULARE 21 



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Ke hy 

CR 
ors. 
Figs. 1-5. ERIOCAULON DECANGULARE L. 
Fic. 1. Transverse sectionof a thick root: C, innermost stratum of cortex ; 
£, endodermis: P, pericambium; //, proto-hadrome vessel; the proto- 
leptome cells are drawn with heavy lines; the drawing shows five proto-had- 
tome vessels, all bordering on endodermis, and alternating with five groups 
of leptome; a large vessel occupies the center of the root. x 495. 
Fig. 2. Transverse section of a part of a thick root; letters as above; V, 
the two central vessels; one of the proto-hadrome vessels has not broken 
through the pericambium. X 495. 
Fig. 3. Transverse section of a lateral root; letters as above; there are 
only two proto-hadrome vessels, both of which border on endodermis. X 495. 
_ FIG. 4. Transverse section through a large mestome bundle from the 
leaf; 4, epidermis of upper face ; B, same of lower surface ; M7, the collenchy- 
matic tissue, which surrounds the mestome bundle completely and extends 
to the epidermis on both faces of the leaf; S, the inner sheath, which forms 
a closed ring around the leptome and hadrome; in the hadrome is a lacune 
with a ring vessel. x 320. 
FiG. 5. Transverse section of a smaller mestome bundle from the leaf; 
letters as above ; the inner sheath (.S) is interrupted by the vessels. X 495- 
