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Andreaea Rupestris (b, 150028-481738) 3744
''Andreaea rupestris'' is a species of moss in the class Andreaeopsida, are commonly referred to as the "lantern mosses" due to the appearance of their dehisced sporangia. It is typically found on smooth, acidic, exposed rock in the Northern hemisphere. It exhibits the common features of the genus ''Andreaea'' such as being acrocarpous, having dark pigmentation, lacking a seta, and bearing 4 lines of dehiscence in its mature sporangia, but can be further identified upon careful examination of its gametophytic leaves which have an ovate base to a more blunt apex compared to other similar species. Taxonomy and classification ''Andreaea rupestris'' is in the genus '' Andreaea,'' which has around 100 different species. It may be difficult to differentiate ''A. rupestris'' from some other species in its genus as it does bear some similar characteristics to other species. Some species which may be mistaken for ''A. rupestris'' are: * ''A. rothii'', which has a similar habitat to ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornworts. Mosses typically form dense green clumps or mats, often in damp or shady locations. The individual plants are usually composed of simple leaves that are generally only one cell thick, attached to a stem that may be branched or unbranched and has only a limited role in conducting water and nutrients. Although some species have conducting tissues, these are generally poorly developed and structurally different from similar tissue found in vascular plants. Mosses do not have seeds and after fertilisation develop sporophytes with unbranched stalks topped with single capsules containing spores. They are typically tall, though some species are much larger. ''Dawsonia'', the tallest moss in the world, can grow to in height. There are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andreaea
''Andreaea'' is a genus of rock mosses described by Johann Hedwig in 1801. They are small, delicate acrocarpous mosses (meaning that the capsules are formed at the tips of vertical branches) that form dark brown or reddish cushions on wet siliceous rocks in mountainous areas. The capsule lacks the peristome teeth and operculum of other mosses, and opens by splitting along 4 vertical slits, the four valves remaining joined at the base and apex. The capsule of ''Andreaea'' has no seta, but the sporophyte (''Spf'' in the diagram below) instead is supported by a pseudopodium (''ps'') derived from gametophyte tissue, as in ''Sphagnum'' and the columella is enclosed within the sporangium. The spores germinate to give thalloid Thallus (plural: thalli), from Latinized Ancient Greek, Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some Marchantiophyta, liverworts, lichens, and the Myxogastr ... proton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andreaea Rupestris (b, 150028-481738) 3744
''Andreaea rupestris'' is a species of moss in the class Andreaeopsida, are commonly referred to as the "lantern mosses" due to the appearance of their dehisced sporangia. It is typically found on smooth, acidic, exposed rock in the Northern hemisphere. It exhibits the common features of the genus ''Andreaea'' such as being acrocarpous, having dark pigmentation, lacking a seta, and bearing 4 lines of dehiscence in its mature sporangia, but can be further identified upon careful examination of its gametophytic leaves which have an ovate base to a more blunt apex compared to other similar species. Taxonomy and classification ''Andreaea rupestris'' is in the genus '' Andreaea,'' which has around 100 different species. It may be difficult to differentiate ''A. rupestris'' from some other species in its genus as it does bear some similar characteristics to other species. Some species which may be mistaken for ''A. rupestris'' are: * ''A. rothii'', which has a similar habitat to ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andreaea Rupestris (d, 113642-470243) 5927
''Andreaea rupestris'' is a species of moss in the class Andreaeopsida, are commonly referred to as the "lantern mosses" due to the appearance of their dehisced sporangia. It is typically found on smooth, acidic, exposed rock in the Northern hemisphere. It exhibits the common features of the genus ''Andreaea'' such as being acrocarpous, having dark pigmentation, lacking a seta, and bearing 4 lines of dehiscence in its mature sporangia, but can be further identified upon careful examination of its gametophytic leaves which have an ovate base to a more blunt apex compared to other similar species. Taxonomy and classification ''Andreaea rupestris'' is in the genus '' Andreaea,'' which has around 100 different species. It may be difficult to differentiate ''A. rupestris'' from some other species in its genus as it does bear some similar characteristics to other species. Some species which may be mistaken for ''A. rupestris'' are: * ''A. rothii'', which has a similar habitat to ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andreaea Nivalis
''Andreaea nivalis'', also known as snow rock-moss, is a species of moss in the Andreaea family found in Alaska, California, Oregon, Washington, Greenland, Spain, Japan, Russia and Poland. It is black and reddish, dioicous, and grows on wet, acidic rocks. It is threatened by droughts and global warming, and is a near-threatened species on the IUCN red list. Description ''Andreaea nivalis'' was first described in 1811. It is black and reddish, and grows in dense cushions. Its leaves can be secund to falcate-secund, meaning they can be sickle-shaped, and curved towards one side. They are mostly subulate, meaning they are awl-shaped. The leaves are mainly falcate-secund when dry. When moist, they are more spread out than when dry. The leaves have a strong costa, and they can have a width of or more, and a length of or more. ''Andreaea nivalis'' has sharp laminal papillae on its dorsal side, which almost reach to its base, and a very short fruit stalk. Unlike other mosses in its spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternation Of Generations
Alternation of generations (also known as metagenesis or heterogenesis) is the predominant type of Biological life cycle, life cycle in plants and algae. It consists of a Multicellular organism, multicellular haploid sexual phase, the gametophyte, which has a single set of chromosomes alternating with a multicellular diploid asexual phase, the sporophyte which has two sets of chromosomes. A mature sporophyte produces haploid spores by meiosis, a process which reduces the number of chromosomes to half, from two sets to one. The resulting haploid spores germinate and grow into multicellular haploid gametophytes. At maturity, a gametophyte produces gametes by mitosis, the normal process of cell division in eukaryotes, which maintains the original number of chromosomes. Two haploid gametes (originating from different organisms of the same species or from the same organism) fertilisation, fuse to produce a diploid zygote, which divides repeatedly by mitosis, developing into a multice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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