Results 181 to 190 of about 14,758 (206)

Au sujet de Pteridium aquilinum

Bulletin mensuel de la Société linnéenne de Lyon, 1965
Combes F. Au sujet de Pteridium aquilinum. In: Bulletin mensuel de la Société linnéenne de Lyon, 34ᵉ année, n°8, octobre 1965. p. 340.
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Phylloplane mycoflora of bracken, Pteridium aquilinum

Transactions of the British Mycological Society, 1974
The phylloplane mycoflora on the fronds of bracken, Pteridium aquilinum , was followed during two seasons and was shown to be similar to that on angiosperm leaves. The succession involved Aureobasidium pullulans, Botrytis cinerea and Clado-sporium herbarum followed by Alternaria alternata and Epicoccum purpurascens .
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Substructure in negatively stained flagella of Pteridium spermatozoids

Journal of Ultrastructure Research, 1967
Phosphotungstate negative staining applied to disintegrated flagella from Pteridium sperm cells revealed that each subfiber in the “nine plus two” pattern was composed of about twelve cylindrically arranged protofibrils. Individual protofibrils were about 35 A across and with a center-to-center spacing of 50 A between adjacent units.
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The movements of spermatozoa of bracken (Pteridium aquilinum)

Experimental Cell Research, 1954
Abstract 1. 1. The movement of bracken sperms in tap water is random, the mean square displacement being proportional to the time. 2. 2. It is known that when sperms arrive at the mucilage at the necks of mature archegonia they become immobilised; it has been found in the present work that this immobilisation is irreversible. 3. 3. Sperms
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Pteridium aquilinum subsp. capense C. Chr.

Published as part of Fischer, Eberhard & Lobin, Wolfram, 2024, Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda, pp.
Fischer, Eberhard, Lobin, Wolfram
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A new species of Pteridiaceae-Pteridium Dachingshanense

Journal of Palaeosciences, 1983
A new fossil species, Pteridium dachingshanense, is described from the Early Cretaceous strata in Dachingshan Range of Neimonggol Autonomous Region (Inner Mongol), China. The species shows some characteristics of Pteridium, such as the continuous marginal sorus and a true scarious indusium. It differs from the living bracken fern Pteridium aquilinum in
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Pteridium

2020
H.J. Beentje, S.A.L. Smith, B. Verdcourt
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INDUCED APOGAMY IN DIPLOID GAMETOPHYTES OF PTERIDIUM

Canadian Journal of Botany, 1966
Diploid gametophytes were produced via self-fertilization and apospory from a strain of haploid gametophytes which underwent apogamy in sterile culture. These diploid gametophytes of the fern, Pteridium, demonstrated quantitative differences from the haploid prothalli.
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Pteridium aquilinum (bracken)

PlantwisePlus Knowledge Bank, 2022
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A Study of Apospory in Pteridium aquilinum

American Fern Journal, 1949
thesis on the Ferns of Quebec,7 Brother Marie-Victorin included this fern, remarking that since it occurs in Vermont almost up to the Canadian boundary, it is surely present in Quebec also. Although this was doubted by others, the fern was later discovered near Bedford, in Quebec a few miles north of the Vermont border, as reported by Mousley.8 In ...
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