Flora Library
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biodisc photomicrograph host:scitec.uwichill.edu.bb
Listing 1 - 6 from 6 for biodisc photomicrograph
biodisc photomicrograph pollen tube pollen grain female gametophyte fern allies generative cell female cone peristome teeth female cones spore bearing leaves liverwort capsule air currents grouped into cones pinnate leaves moss capsule dispersal mechanisms
Spore dispersal in Bryophytes
... spores and a second cell type called elaters. The moss capsule has several tissues. Biodisc photomicrograph L.S. Liverwort capsule & stalk calyptra (cap) operculum (lid) annulus (ring) peristome columella spores ... the air (e.g. Pellia).. exposed spore/elater mass at centre of open valves Biodisc photomicrograph spores (red/purple) and elaters (blue) Close up of elater and spore © Malcolm Storey, ...
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The Ferns
... be tucked protectively under the leaf edge (below). . V.S. Leaf of Adiantum (maidenhair fern) Biodisc photomicrograph Some ferns, rather than having spores borne on all leaflets, have separate specialised spore-bearing ...
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Fern Allies
... and sterile leaves but grouping the sporophylls into a cone is quite different and distinct.) Biodisc photomicrograph At left is an L.S. of a Lycopodium cone. Note the sporangium in the ... . In Selaginella the roots are typically borne on a rhizophore which extends from the stem. Biodisc photomicrograph In the LS of the cone of Selaginella (left), you should be able to see ...
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Cycads
... each bearing microsporangia containing microspores (pollen). Cycas male cones male cone with 2 microsporophylls removed Biodisc photomicrograph microsporophyll showing microsporangia on surface C.S. microsporophyll & microsporangia Female cones & megasporophylls Megasporophyll of Cycas ...
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The Pines
... year. Biodisc photomicrograph Male reproductive organs The male cone or microstrobilus is simply an axis bearing microsporophylls, each with two pollen-filled microsporangia. Biodisc photomicrograph0 ... female cone. prothallial cell generative cell tube cell air bladder Biodisc photomicrograph Female reproductive organs Biodisc photomicrograph The female cone (megastrobilus) is a spiral cluster of ...
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Introduction to the Flowering Plants
... Female gametophyte greatly reduced - (yellow region at right) to 8 nuclei. There is no archegonium. Biodisc photomicrograph Unique double fertilization - one male nucleus fuses with the egg to form the zygote which ...
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