Results 251 to 260 of about 1,117,024 (294)

Pollen morphology of the Onagraceae

Review of Palaeobotany and Palynology, 1967
Abstract This incomplete but comprehensive survey based upon the pollen of 21 genera and over 100 species of the Onagraceae shows the following pollen types: 1. ( 1 ) Pollen in tetrads and disarticulated tetrads. The single grains usually have a thicker ring at the base of the somewhat aspidote pore. This condition occurs in Epilobium (in part),
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Pollen morphology in the trimeniaceae

Grana, 1984
Abstract Piptocalyx macrurus Gilg & Schlechter, P. moorei Oliver and Trimenia neocaledonica Baker f. have disulculate, globose-elliptic or globose-spherical to globose-elliptic grains, with finely reticulate or rugulose (T. neocaledonica) structure. T. papuana Ridley has dimorphic pollen, with only one type on an individual plant, consisting of either ...
F. B. Sampson, P. K. Endress
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The Pollen Morphology of Moringaceae

Kew Bulletin, 1985
The pollen morphology of 13 species of the genus Moringa has been studied. The pollen exine is rather distinctive and uniform in structure throughout the family. It is spheroidal, tricolporate with costate colpi, the ornamentation is psilate with sparse puncta, the endexine is very thick at the apertures but almost absent from the mesocolpial and polar
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Pollen Morphology of the Cactaceae

Grana Palynologica, 1963
(1963). Pollen Morphology of the Cactaceae. Grana Palynologica: Vol. 4, No. 3, pp. 367-372.
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3. POLLEN MORPHOLOGY

TAXON, 1980
SummaryPollen morphology ofAralidiumshows no close resemblance to that of the Araliaceae, Cornaceae (sens, lat.), or Griseliniaceae.
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Pollen Morphology of Tribulaceae

Grana, 1987
Abstract The pollen morphology of the Tribulaceae Hadidi, was investigated by means of LM, SEM, and TEM. In the Tribulaceae, two completely different pollen types are encountered, each restricted to one of the two stenopalynous subfamilies. The Tribuloideae invariably have polypantoporate, spheroidal, sometimes slightly elliptical, reticulate pollen ...
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Comparative pollen morphology and ultrastructure of the Callitrichaceae

American Journal of Botany, 2000
The Callitrichaceae are an aquatic family of dicots that include the single, geographically cosmopolitan genus Callitriche. Callitriche contains 40–50 terrestrial, amphibious, and obligately submersed species, and it is the only known genus in the plant kingdom with co‐occurring aerial and hydrophilous pollination syndromes.
R L, Cooper, J M, Osborn, C T, Philbrick
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POLLEN MORPHOLOGY OF THE LENNOACEAE

American Journal of Botany, 1962
Drugg, Warren S. (California Res. Corp., La Habra.) Pollen morphology of the Lennoaceae. Amer. Jour. Bot. 49(10): 1027–1032. Illus. 1962.—The family Lennoaceae contains 3 genera: Pholisma, Lennoa, and Ammobroma. The pollen of Pholisma is 4‐colporate with less common 3‐ and 5‐colporate grains. Lennoa pollen is 3‐colporate with rare 4‐colporate examples.
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Pollen Morphology in the Polemoniaceae

Grana Palynologica, 1967
Abstract Twenty-six pollen types have been described from among 144 species investigated. The descriptions are supplemented by a table (with NPC-classification and short descriptions; see p. 200). For the determination of the pollen grains a key (p. 208) has been made. The relationships between genera, sections, and tribes are adumbrated in Fig.
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Pollen Morphology

2021
Fernando Ramírez, Thomas Lee Davenport
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