In selaginella the spores are of one type or two type or three type or four type
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Selaginella produces two types of spores—megaspores and microspores
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Selaginella produces two types of spores—megaspores and microspores
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Selaginella produces mainly two types of spores, microspores and megaspores. Because of the two different types of spores which are produced it is called as heterospory (different spore outcomes).
Vegetative reproduction occurs by fragmentation, fleshy buds (bulbils) and tubers (stem tubers such as in a potato). Their sporophylls are aggregated at the tips of stem branches to form strobili or sporangiferous spikes. Sporangia develop into axil of sporophylls.
Megasporangia are larger, whitish or yellowish often lobed with 1-4 haploid megaspores. Microsporangia are smaller, yellowish-reddish globular-reniform structures which produce a large number of haploid microspores.
Spores begin to develop precociously inside the sporangia. It's whole process is completed later on.
Vegetative reproduction occurs by fragmentation, fleshy buds (bulbils) and tubers (stem tubers such as in a potato). Their sporophylls are aggregated at the tips of stem branches to form strobili or sporangiferous spikes. Sporangia develop into axil of sporophylls.
Megasporangia are larger, whitish or yellowish often lobed with 1-4 haploid megaspores. Microsporangia are smaller, yellowish-reddish globular-reniform structures which produce a large number of haploid microspores.
Spores begin to develop precociously inside the sporangia. It's whole process is completed later on.
They are also nicknamed as club mosses and spike mosses
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