Descriptor : end wall slope

Descriptor type : categorical

end wall slope of of wide tracheary elements of metaxylem

definition by:
V. Cheadle. The origin and certain trends of specialization of the vessel in the Monocotyledoneae. Amer. J. Bot., 30:11–17, 1943.

application in palms by:
P. B. Tomlinson. Trends in cell dilensions in palms. Amer. Phil. Soc. YRBK, pages 354–355, 1965.
AND
L. H. Klotz. Form of the perforation plates in the wide vessels of metaxylem in palm. J. Arnold Arbor., 59(2):105–128, 1978.

In remark of the state is given the detailed composition with the e v o s t abreviations (extremly oblique, very oblique, oblique, slightly oblique, transverse): %(e) - %(v) - %(o) - %(s) - %(t)

extremely oblique

end wall > 10 times as long as cell width

very oblique

end wall >5 to ≤ 10 times as long as cell width

oblique

end wall > 2 to ≤ 5 times as long as cell width

slightly oblique

end wall > 1 to ≤ 2 times as long as cell width

transverse

end wall perpendicular to lateral wall

Hierarchy

wide metaxylem element
 |
 |_ end wall slope

Belongs to the groups