pollen grains aperturate

Listing 1 - 5 from 5 for pollen grains aperturate

Angiosperm Families - Acanthaceae Juss.
... pollination. Plants hermaphrodite. Pollination entomophilous; mechanism conspicuously specialized (commonly exhibiting a loose-pollen mechanism, cf. Scophulariaceae etc. — e.g. the large bee-flowers ... of the ‘dicot’ type. Tapetum glandular. Pollen monosiphonous; shed as single grains. Pollen grains aperturate, or nonaperturate (rarely); 2–8 aperturate; colpate, or porate, or colporate, or ...
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Angiosperm Families - Aceraceae Juss.
... middle layer, or initially with more than one middle layer. Tapetum glandular. Pollen monosiphonous; shed as single grains. Pollen grains aperturate; mostly 3 aperturate; porate, or colporate; 2-celled. Gynoecium (in female flowers) 2 carpelled. The ...
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Chapter 3: Taxonomy, Page 1
... , or linear. Anther wall initially with more than one middle layer. Tapetum glandular. Pollen grains aperturate; 1 - aperturate (usually), or 2-aperturate; sulcate (usually, sometimes trichotomosulcate), or sulculate (2-sulculate); 2-celled. Gynoecium 3(-10 ...
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Glossary of Pollen and Spore Terminology - Part 2 (D-H)
... , 1952) The name given to the widespread arrangement in developmental tetrads of tri-aperturate pollen grains whereby the apertures form in pairs at six points in the tetrad. Example: ... for example of certain Compositae and Acanthaceae pollen grains. See also: internal foramen. Fossaperturate (adj.) (Erdtman, 1952) Refers to an equatorially aperturate, lobate pollen grain with the apertures in the ...
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Glossary of Pollen and Spore Terminology - Part 5 (S-Z)
... Example: Viburnum opulus (Caprifoliaceae). See also: duplicolumellate, pluricolumellate. Sinu-aperturate (adj.) (Erdtman, 1952) Describing a pollen grain in which the equatorial apertures are situated in the ... in the Triprojectacites group of fossil pollen grains. Example: Aquilapollenites. Tryphine (Erdtman, 1969) A material deposited on the surface of pollen grains by the breakdown of the tapetum ...
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