Information om | Engelska ordet GYMNOSPERM

Exempel på hur man kan använda GYMNOSPERM i en mening

• Ginkgoales are a gymnosperm order containing only one extant species: Ginkgo biloba, the ginkgo tree.
• Welwitschia is a monotypic genus (that is, a genus that contains a single recognised species) of gymnosperm, the sole described species being the distinctive Welwitschia mirabilis, endemic to the Namib desert within Namibia and Angola.
• The term is applied to the sprouting of a seedling from a seed of an angiosperm or gymnosperm, the growth of a sporeling from a spore, such as the spores of fungi, ferns, bacteria, and the growth of the pollen tube from the pollen grain of a seed plant.
• Because of this, gnetophytes were once thought to be the closest gymnosperm relatives to flowering plants, but more recent molecular studies have brought this hypothesis into question, with many recent phylogenies finding them to be nested within the conifers.
• Hardwood (which comes from angiosperm trees) contrasts with softwood (which is from gymnosperm trees).
• There are two types of self-pollination: in autogamy, pollen is transferred to the stigma of the same flower; in geitonogamy, pollen is transferred from the anther of one flower to the stigma of another flower on the same flowering plant, or from microsporangium to ovule within a single (monoecious) gymnosperm.
• A conifer cone or, in formal botanical usage, a strobilus, : strobili, is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads.
• Falcatifolium taxoides from New Caledonia is the exclusive host of the Parasitaxus usta, the only known parasitic gymnosperm.
• Taxodium ascendens is classified as a perennial gymnosperm that is native to the southeastern United States.
• Gnetum gnemon is a gymnosperm species of Gnetum, its native area spans from Mizoram and Assam in India down south through Malay Peninsula, Malay Archipelago and the Philippines in southeast Asia to the western Pacific islands.
• Of the 44 indigenous species of gymnosperms, 43 are endemic, including the only known parasitic Gymnosperm (Parasitaxus usta).
• Mazon Creek flora includes: lycopsids, related to modern club moss, with arborescent forms named Lepidophloios, Sigillaria and Lepidodendron, and herbaceous forms called Lycopodites and Cormophyton; sphenopsids like Calamites a tree-like horsetail relative, with common foliage names of Annularia and Asterophyllites, and a vine-like form called Sphenophyllum; Pteridophyta as marattitalean tree ferns and Filicales and Zygopteridales understory ferns, with common foliage names of Pecopteris, Acitheca and Lobatopteris; pteridosperms, also known as seed ferns, an extinct group of plants that grew both as trees and smaller shrubs, with features like pinnated leaves similar to true ferns, but reproduced by seeds instead of spores; they had common foliage names Mariopteris, Alethopteris, Odontopteris, Neuropteris, Laveineopteris and Macroneuropteris; extinct gymnosperm Cordaites, believed to be closely related to and sharing many features with modern conifers.
• A total of 222 plant species have been recorded on the Ben Lomond plateau, represented by 152 dicotyledons, 62 monocotyledons, 1 gymnosperm and 7 fern and fern ally families.
• The climate at the time of deposition was temperate, warm, and humid, with seasonal rainfall and possible monsoons Flora from the formation includes the equisetalean Schizoneura, the glossopterid gymnosperm Glossopteris, and seed fern Lepidopteris.
• Flora from the formation includes the equisetalean Schizoneura, the glossopterid gymnosperm Glossopteris, and seed fern Lepidopteris.
• Longipteryx was frugivorous, indicated by the discovery of complete gymnosperm seeds and a lack of gastroliths within two specimens, STM8–86 and STM8–112.
• Fossil pollen (palynomorphs) include bryophyte and pteridophyte spores, gymnosperm pollen, and abundant angiosperm pollen, including Aquilapollenites striatus, Ilexpollenites compactus, Interpollis cf.
• concinna, gymnosperm reproduction cells are haploids, and the endosperm of angiosperms are triploids.
• Zamia fischeri is the host plant for Cycad leaf necrosis virus, the only known Badnavirus to infect a gymnosperm.
• An estimated 919 floral species have been recorded including 298 vascular plants, 234 dicots, 58 monocots, five pteridophytes, and one gymnosperm.

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