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Myriophyllum
''Myriophyllum'' (water milfoil) is a genus of about 69 species of freshwater aquatic plants, with a cosmopolitan distribution. The centre of diversity for ''Myriophyllum'' is Australia with 43 recognized species (37 endemic). These submersed aquatic plants are perhaps most commonly recognized for having elongate stems with air canals and whorled leaves that are finely, pinnately divided, but there are many exceptions. For example, the North American species ''M''. ''tenellum'' has alternately arranged scale-like leaves, while many Australian species have small alternate or opposite leaves that lack dissection. The plants are usually heterophyllous; leaves above the water are often stiffer and smaller than the submerged leaves on the same plant and can lack dissection. Species can be monoecious or dioecious. In monoecious species, plants are hermaphrodite, while in dioecious species, plants are either male or female, the flowers are small, 4(2)-parted and usually borne in emergent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myriophyllum Spicatum
''Myriophyllum spicatum'' (Eurasian watermilfoil or spiked water-milfoil) is a submerged perennial aquatic plant which grows in still or slow-moving water. Eurasian watermilfoil is native to Europe, Asia, and North Africa, but has a wide geographic and climatic distribution among some 57 countries, extending from northern Canada to South Africa. It is considered to be a highly invasive species. Description Eurasian watermilfoil has slender stems up to long. The submerged leaf, leaves (usually between 15–35 mm long) are borne in pinnate whorls of four, with numerous thread-like leaflets roughly 4–13 mm long. Plants are monoecious with flowers produced in the leaf axils (male above, female below) on a spike 5–15 cm long held vertically above the water surface, each flower is inconspicuous, orange-red, 4–6 mm long. Eurasian watermilfoil has 12–21 pairs of leaflets while northern watermilfoil ''M. sibiricum'' only has 5–9 pairs. The two can hybridize a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myriophyllum Variifolium
''Myriophyllum variifolium'' is a species of water milfoil native to eastern Australia where it grows in aquatic habitat such as ponds and streams. Joseph Dalton Hooker described the species in 1840, from material collected in the Lachlan River, as well as Tasmania. The Tasmanian material resembled the description more closely, and the New South Wales material has been separated as a different species, hence the original Tasmanian material was made the neolectotype. ''Myriophyllum variifolium'' is found from southeastern South Australia and western Victoria, and eastern Victoria through New South Wales into southeastern Queensland. It also occurs in central and eastern Tasmania. It grows in shallow still or slowly-moving water deep. An aquatic herbaceous plant, ''M. variifolium'' grows to about in length, its smooth stems around in diameter. ''Myriophyllum variifolium'' intergrades with the very similar '' M. simulans'' in western Victoria and South Australia. Molecular wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myriophyllum Alterniflorum
''Myriophyllum alterniflorum'', known as alternate water-milfoil or alternateflower watermilfoil, is a species of water-milfoil. It is native to Europe and Asia, has been introduced to North America and inhabits aquatic habitat, such as pond A pond is a small, still, land-based body of water formed by pooling inside a depression (geology), depression, either naturally or artificiality, artificially. A pond is smaller than a lake and there are no official criteria distinguishing ...s and streams. Description ''M. alterniflorum'' is an aquatic plant that stands approximately 4 feet tall with stems that range from 1-4 feet long. Stems are often submerged in murky or clear water. ''M. alterniflorum'' leaves are found both submerged and above water, with leaf location influencing their physical characteristics. Their leaves have blade lengths of 3-22 mm with emergent leaves being smaller than those submerged. All leaves exhibit a whorled habit, with 3 or more leaves per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myriophyllum Aquaticum
''Myriophyllum aquaticum'' is a flowering plant, a vascular dicot, commonly called parrot's-feather and parrot feather watermilfoil. Morphology and reproduction Parrot feather is a perennial plant named for its feather-like leaves which grow in whorls of four to six around the stem. Its emergent stems and leaves are its most distinctive features, as they can grow up to a foot above the water's surface, resembling small fir trees. The woody emergent stems can grow to over 5 feet / 1.5m tall and will extend to the bank and shore. Pinkish-white flowers measuring approximately 1/16 inches long extend out from the plant. As the water warms in the spring, the species begins to flourish, and while most individuals flower in the spring, some also flower in autumn. Almost all plants of this species are female; in fact, no male plants have ever found outside of South America. Seeds are not produced by any North American plants. Parrot feather reproduces asexually. New plants grow from frag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Plant
Aquatic plants, also referred to as hydrophytes, are vascular plants and Non-vascular plant, non-vascular plants that have adapted to live in aquatic ecosystem, aquatic environments (marine ecosystem, saltwater or freshwater ecosystem, freshwater). In lakes, rivers and wetlands, aquatic vegetations provide cover for aquatic animals such as fish, amphibians and aquatic insects, create substrate (marine biology), substrate for benthic invertebrates, produce oxygen via photosynthesis, and serve as food for some herbivorous wildlife. Familiar examples of aquatic plants include Nymphaeaceae, waterlily, Nelumbo, lotus, duckweeds, mosquito fern, floating heart, water milfoils, Hippuris, mare's tail, water lettuce, water hyacinth, and algae. Aquatic plants require special adaptation (biology), adaptations for prolonged inundation in water, and for buoyancy, floating at the water surface. The most common adaptation is the presence of lightweight internal packing cells, aerenchyma, but floa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euhrychiopsis Lecontei
''Euhrychiopsis lecontei'', also known as the milfoil weevil, is a type of weevil that has been investigated as a potential biocontrol agent for Eurasian water milfoil. It is found in the eastern and central United States and western Canada. Life cycle ''E. lecontei'' is a holometabolous insect, undergoing true metamorphosis. Development is temperature dependent, but the time to develop from eggs to larvae is about 4 days, from larvae to pupae 13 days, and from pupae to adults 13 days. Larvae are stem borers and damage plant tissue from about 7 cm from the tip of the plant. Use as a Biocontrol Milfoil weevils occur in natural populations in much of North America on their native host, Northern watermilfoil ( Myriophyllum sibiricum). They often reach sufficient densities to suppress invasive Eurasian watermilfoil (Myriophyllum spicatum) infestations after a prolonged infestation or artificial augmentation. Studies indicate that for effective control a density of about 1 wee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
