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Leucobryum Candidum
''Leucobryum candidum'', commonly known as milk moss, is a species of moss that occurs throughout Tasmania, Australia, and other parts of the world. It is the sole species representative of '' Leucobryum'' in Tasmania, despite the genus being widespread throughout other cool temperate regions. Description ''Leucobryum candidum'' ranges in colour from pale green to whitish green, growing in turfs or mats that appear glaucous. The leaf blades (lamina) are narrow (4.5-6.0mm long, 0.8-1.4mm wide) and curved, very pale; almost blue-white when dry. This colour is caused by a leaf composition of 4-6 layers of large hyaline cells surrounded by layers of pores (leucocysts) and embedded chlorophyllose cells (chlorocysts); 1-3 layers adaxially, 2-3 abaxially. The leaves of ''L. candidum'' overlap each other and are arranged spirally along the stems. The lamina are almost entirely occupied by the central vein (costa), and are not auriculate as the base is slightly narrowed. Leaves loca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Ernst Ludwig Hampe
Georg Ernst Ludwig Hampe (5 July 1795 – 23 November 1880) was a German pharmacist, botanist and bryologist who was a native of Fürstenberg. In 1810 he became an apprentice pharmacist to his uncle in Brakel, and over the next fifteen years worked in several different pharmacies, including one in Halle an der Saale, where he made the acquaintance of botanist Kurt Sprengel (1766-1833). He also worked at the university pharmacy in Göttingen, and at establishments in Allendorf and Braunschweig. In 1825 he became head of a local pharmacy in Blankenburg am Harz, where he remained its director up until 1864. With Friedrich Gottlieb Bartling he edited the exsiccatae ''Vegetabilia cellularia in Germania septentrionali praesertim in Hercynia et in agro Göttingensi. Ser. A-D'' (1832-1845).Triebel, D. & Scholz, P. 2001–2024 ''IndExs – Index of Exsiccatae''. – Botanische Staatssammlung München: http://indexs.botanischestaatssammlung.de. – München, Germany. During hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucobryum
''Leucobryum'' is a genus of haplolepideous mosses (Dicranidae) in the family Leucobryaceae. The name comes from the Greek leukos, meaning white, and bryon, meaning moss. Description Leucobryum species are found in erect, dense, and often rounded cushions. Their color varies from white to grayish or bluish-green. Species are characterized by having thick, whitish leaves with a large, expanded costa. It has been suggested that the characteristic pale color exhibited by some species is caused by air bubbles in the leucocysts. The bubbles are theorized to be necessary for the function of the chlorocysts for the purpose of gas exchange. Species are dioecious, with male plants stunted and found growing among the leaves of the female plants. Sporophytes are rare. There are approximately 122 species of Leucobryum worldwide. Only two species are known to occur in North America. Species Species adapted from The Plant List; *'' Leucobryum acutifolium'' *'' Leucobryum aduncum'' * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaucous
''Glaucous'' (, ) is used to describe the pale grey or bluish-green appearance of the surfaces of some plants, as well as in the names of birds, such as the glaucous gull (''Larus hyperboreus''), glaucous-winged gull (''Larus glaucescens''), glaucous macaw (''Anodorhynchus glaucus''), and glaucous tanager (''Thraupis glaucocolpa''). The term ''glaucous'' is also used botanically as an adjective to mean "covered with a greyish, bluish, or whitish waxy coating or bloom that is easily rubbed off" (e.g. glaucous leaves). The first recorded use of ''glaucous'' as a color name in English was in the year 1671. Examples The epicuticular wax coating on mature plum fruit gives them a glaucous appearance. Another familiar example is found in the common grape genus (''Vitis vinifera''). Some cacti have a glaucous coating on their stem(s). Glaucous coatings are hydrophobic so as to prevent wetting by rain. Their waxy character serves to hinder climbing of leaves, stem or fruit by i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyaline
A hyaline substance is one with a glassy appearance. The word is derived from , and . Histopathology Hyaline cartilage is named after its glassy appearance on fresh gross pathology. On light microscopy of H&E stained slides, the extracellular matrix of hyaline cartilage looks homogeneously pink, and the term "hyaline" is used to describe similarly homogeneously pink material besides the cartilage. Hyaline material is usually acellular and proteinaceous. For example, arterial hyaline is seen in aging, high blood pressure, diabetes mellitus and in association with some drugs (e.g. calcineurin inhibitors). It is bright pink with PAS staining. Ichthyology and entomology In ichthyology and entomology Entomology (from Ancient Greek ἔντομον (''éntomon''), meaning "insect", and -logy from λόγος (''lógos''), meaning "study") is the branch of zoology that focuses on insects. Those who study entomology are known as entomologists. In ..., ''hyaline'' denotes a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorophyllase
Chlorophyllase is an essential enzyme in chlorophyll metabolism. It is a membrane proteins commonly known as chlase (EC 3.1.1.14, CLH) with systematic name chlorophyll chlorophyllidohydrolase. It catalyzes the reaction :chlorophyll + H2O = phytol + chlorophyllide Chlorophyllase can be found in the chloroplast, thylakoid membrane and etioplast of at least higher plants such as ferns, mosses, brown and red algae and diatoms. Chlase is the catalyst for the hydrolysis of chlorophyll to produce chlorophyllide (also called Chlide) and phytol. It is also known to function in the esterification of Chlide and transesterification. The enzyme functions optimally at pH 8.5 and 50 °C. Role of chlorophyllase in chlorophyll breakdown Of high importance to all photosynthetic organisms is chlorophyll, and so, its synthesis and breakdown are closely regulated throughout the entire life cycle of the plant. Chlorophyll breakdown is most evident in seasonal changes as the plants lose their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auriculate
The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets). The edge of the leaf may be regular or irregular, and may be smooth or have hair, bristles, or spines. For more terms describing other aspects of leaves besides their overall morphology see the leaf article. The terms listed here all are supported by technical and professional usage, but they cannot be represented as mandatory or undebatable; readers must use their judgement. Authors often use terms arbitrarily, or coin them to taste, possibly in ignorance of established terms, and it is not always clear whether because of ignorance, or personal preference, or because usages change with time or context, or because of variation between specimens, even specimens from the same plant. For example, whether to call leaves on the same tree "acu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizoid
Rhizoids are protuberances that extend from the lower epidermal cells of bryophytes and algae. They are similar in structure and function to the root hairs of vascular land plants. Similar structures are formed by some fungi. Rhizoids may be unicellular or multicellular. Evolutionary development Plants originated in aquatic environments and gradually migrated to land during their long course of evolution. In water or near it, plants could absorb water from their surroundings, with no need for any special absorbing organ or tissue. Additionally, in the primitive states of plant development, tissue differentiation and division of labor were minimal, thus specialized water-absorbing tissue was not required. The development of specialized tissues to absorb water efficiently and anchor the plant body to the ground enabled the spread of plants onto land. Description Rhizoids absorb water mainly by capillary action in which water moves up between threads of rhizoids; this is in co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucobryaceae
Leucobryaceae is a family of haplolepideous mosses (Dicranidae) in the order Dicranales. Description Members of the family grow small to large cushions. Species are characterized by having thick, whitish leaves with a large, expanded costa. It has been suggested that the characteristic pale color exhibited by some species is caused by air bubbles in the leucocysts, and the presence of air in the leaf is assumed characteristic of the Leucobryaceae.Robinson, H. 1985. The structure and significance of the leucobryaceous leaf. Monogr. Syst. Bot. Missouri Bot. Gard. 11: 111-120. Robinson, H. 1990. A functional evolution of the Leucobryaceae. Trop. Bryol. 2: 223-237. Yamaguchi, T. 1993. A revision of the genus Leucobryum (Musci) in Asia. J. Hattori Bot. Lab. 73: 1-123. Classification The Leucobryaceae have been sometimes included in the Dicranaceae because of similar costa and peristome structures. The number of genera assigned to the family has been subject to much debate and has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicranaceae
Dicranaceae is a family of haplolepideous mosses ( Dicranidae) in class Bryopsida. Species within this family are dioicous. Genera in this family include '' Dicranum'', '' Dicranoloma'', and '' Mitrobryum''. Classification The family Dicranaceae contains the following genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ...: *'' Anisothecium'' *'' Aongstroemia'' *'' Aongstroemiopsis'' *'' Braunfelsia'' *'' Brotherobryum'' *'' Bryotestua'' *'' Camptodontium'' *'' Campylopodium'' *'' Chorisodontium'' *'' Cnestrum'' *'' Cryptodicranum'' *'' Dicnemon'' *'' Dicranella'' *'' Dicranoloma'' *'' Dicranum'' *'' Diobelonella'' *'' Eucamptodon'' *'' Eucamptodontopsis'' *'' Holomitriopsis'' *'' Holomitrium'' *'' Hygrodicranum'' *'' Leptotrichella'' *'' Leucoloma'' * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epiphyte
An epiphyte is a plant or plant-like organism that grows on the surface of another plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phorophytes. Epiphytes take part in nutrient cycles and add to both the diversity and biomass of the ecosystem in which they occur, like any other organism. In some cases, a rainforest tree's epiphytes may total "several tonnes" (several long tons). They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively. An organism that grows on another organism that is not a plant may be called an epibiont. Epiphytes are usually found in the temperate zone (e.g., many mosses, liverworts, lichens, and algae) or in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucobryum Aduncum
''Leucobryum'' is a genus of haplolepideous mosses (Dicranidae) in the family Leucobryaceae. The name comes from the Greek leukos, meaning white, and bryon, meaning moss. Description Leucobryum species are found in erect, dense, and often rounded cushions. Their color varies from white to grayish or bluish-green. Species are characterized by having thick, whitish leaves with a large, expanded costa. It has been suggested that the characteristic pale color exhibited by some species is caused by air bubbles in the leucocysts. The bubbles are theorized to be necessary for the function of the chlorocysts for the purpose of gas exchange. Species are dioecious, with male plants stunted and found growing among the leaves of the female plants. Sporophytes are rare. There are approximately 122 species of Leucobryum worldwide. Only two species are known to occur in North America. Species Species adapted from The Plant List; *'' Leucobryum acutifolium'' *'' Leucobryum aduncum'' *' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucobryum Javense
''Leucobryum'' is a genus of haplolepideous mosses (Dicranidae) in the family Leucobryaceae. The name comes from the Greek leukos, meaning white, and bryon, meaning moss. Description Leucobryum species are found in erect, dense, and often rounded cushions. Their color varies from white to grayish or bluish-green. Species are characterized by having thick, whitish leaves with a large, expanded costa. It has been suggested that the characteristic pale color exhibited by some species is caused by air bubbles in the leucocysts. The bubbles are theorized to be necessary for the function of the chlorocysts for the purpose of gas exchange. Species are dioecious, with male plants stunted and found growing among the leaves of the female plants. Sporophytes are rare. There are approximately 122 species of Leucobryum worldwide. Only two species are known to occur in North America. Species Species adapted from The Plant List; *'' Leucobryum acutifolium'' *'' Leucobryum aduncum'' * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
