absent secondary thickening

Listing 1 - 4 from 4 for absent secondary thickening

Angiosperm Families - Acanthaceae Juss.
... Cortical bundles absent. Medullary bundles present (rarely), or absent. Internal phloem present, or absent. Secondary thickening developing from a conventional cambial ring. ‘Included’ phloem absent. Xylem ... absent. Flavonols present (rarely), or absent; when present, kaempferol and quercetin (traces). Ellagic acid absent (8 species, 7 genera). Saponins/sapogenins present (rarely), or absent. ...
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Angiosperm Families - Aceraceae Juss.
... absent. Medullary bundles absent. Internal phloem absent. Secondary thickening developing from a conventional cambial ring. The secondary phloem stratified into hard (fibrous) and soft (parenchymatous) zones, or not stratified. ‘Included’ phloem absent ... Acer species), or absent (one Acer species, Dipteronia). Arbutin absent. Saponins/sapogenins present, or absent. Aluminium accumulation not found ...
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Glossary
... a flower comes into full bloom. Apophysis- The rounded, exposed thickening on the scales of certain pine cones. Appalachian Highlands- ... , and essentially unmixed with, the mineral soil. Earthworms are absent. Muck- Highly decomposed organic material formed under conditions of waterlogging ... main axis is formed by a series of successive secondary axes, each of which represents one fork of a dichotomy. ...
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Chapter 3: Taxonomy, Page 1
... phloem transfer cells (Chamaerops). Vessels present; end-walls scalariform. Stem anatomy. Secondary thickening absent (or slight, and then not cambial but from divisions in the ... Alkaloids present (occasionally, pyrimidine), or absent. Proanthocyanidins present (usually, abundantly), or absent (e.g. Livistona); cyanidin. Flavonols present (rarely), or absent; when present, kaempferol and quercetin ( ...
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