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Diplazium Molokaiense
''Diplazium molokaiense'' is a rare species of fern known by the common name Molokai twinsorus fern. It is endemic to Hawaii, where it is one of the rarest ferns.Wood, K. R. (2006)Conservation status of the Hawaiian endemic fern ''Diplazium molokaiense'' (Athyriaceae) in Honomanu, East Maui, Hawai'i.''Endangered Species Research'' 5 1-5. It has historically been found on the islands of Kauai, Oahu, Lanai, Molokai, and Maui, but it is thought to have been extirpated from four of them and today can be found only on Maui where fewer than 70 individual plants remain. The fern was federally listed as an endangered species of the United States in 1994. Characteristics This fern has leaves up to about 20 centimeters long growing from a twisted rhizome. Each dark green, shiny leaf is made up of several pairs of leaflets, the largest of which is about 5 × 2 cm. They have pointed tips and slightly rippled edges. The sori are up to a centimeter long and are narrow and somewhat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbarium
A herbarium (plural: herbaria) is a collection of preserved plant specimens and associated data used for scientific study. The specimens may be whole plants or plant parts; these will usually be in dried form mounted on a sheet of paper (called ''exsiccatum'', plur. ''exsiccata'') but, depending upon the material, may also be stored in boxes or kept in alcohol or other preservative. The specimens in a herbarium are often used as reference material in describing plant taxa; some specimens may be types. The same term is often used in mycology to describe an equivalent collection of preserved fungi, otherwise known as a fungarium. A xylarium is a herbarium specialising in specimens of wood. The term hortorium (as in the Liberty Hyde Bailey Hortorium) has occasionally been applied to a herbarium specialising in preserving material of horticultural origin. History The making of herbaria is an ancient phenomenon, at least six centuries old, although the techniques have chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterfall
A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in several ways, but the most common method of formation is that a river courses over a top layer of resistant bedrock before falling on to softer rock, which erodes faster, leading to an increasingly high fall. Waterfalls have been studied for their impact on species living in and around them. Humans have had a distinct relationship with waterfalls for years, travelling to see them, exploring and naming them. They can present formidable barriers to navigation along rivers. Waterfalls are religious sites in many cultures. Since the 18th century they have received increased attention as tourist destinations, sources of hydropower, andparticularly since the mid-20th centuryas subjects of research. Definition and terminology A waterfall is genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diplazium Sandwichianum
''Diplazium'' is a genus of ferns that specifically includes the approximately 400 known species of twinsorus ferns. The Greek root is ''diplazein'' meaning ''double'': the indusia in this genus lie on both sides of the vein. These ferns were earlier considered part of either the Athyriaceae, Dryopteridaceae, Aspleniaceae, or Polypodiaceae families or recognized as belonging to their own taxonomic family. The Pteridophyte Phylogeny Group classification of 2016 (PPG I) places the genus in the Athyriaceae. The taxonomy of the genus is difficult and poorly known, and by 2009 has never been the subject of a complete monographic study. Their distribution is pantropical, with a few species extending into temperate areas. The rhizome of the genus ''Diplazium'' varies from creeping to erect, and is scaly. Its fronds are deciduous or evergreen, are trophopodicThe trophopod is food storage organ described from a number of North American ferns. It consists of the enlarged and modified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pneumatopteris Sandwicensis
''Pneumatopteris'' is a genus of about 80 species of terrestrial ferns in the family Thelypteridaceae. The range of the genus extends from tropical Africa, through Asia, Malesia and Australia to the Pacific islands, including Hawaii and New Zealand. It was first described by Japanese botanist Takenoshin Nakai in 1933. The name comes from the Greek ''pneuma'' (air, wind or breath), and ''pteris'' (a fern), with reference to the aerophores in some species. Species * ''Pneumatopteris pennigera'' (G.Forst.) Holttum * ''Pneumatopteris truncata ''Pneumatopteris truncata'', also known as the Christmas Island fern, is a species of terrestrial fern in the Thelypteridaceae family. Description The species grows as a large upright fern with 80–120 cm long fronds. Distribution a ...'' (Poir.) Holttum References Fern genera Taxa named by Takenoshin Nakai Plants described in 1933 {{Polypodiales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polystichum Haleakalense
''Polystichum'' is a genus of ferns in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus has about 500 species and has a cosmopolitan distribution. The highest diversity is in eastern Asia, with about 208 species in China alone; the region from Mexico to Brazil has at least 100 additional species; Africa (at least 17 species), North America (at least 18 species), and Europe (at least 5 species) have much lower diversity. ''Polystichum'' species are terrestrial or rock-dwelling ferns of warm-temperate and montane-tropical regions (a few species grow in alpine regions). They are often found in disturbed habitats such as road cuts, talus slopes, and stream banks. Description Many ferns of this genus have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of evergreen fronds long. The sori are round, with a circular indusium, except in South American species which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteris Cretica
''Pteris cretica'', the Cretan brake, ribbon fern, or Cretan brake fern, is a species of evergreen fern in the family Pteridaceae, native to Europe, Asia and Africa. Description The fern grows to tall by broad. It has arching pinnate fronds each bearing up to five pinnae. Cultivation ''Pteris cretica'' is cultivated widely by plant nurseries. It is used in gardens in the ground and as a potted plant, and as a houseplant. The variety with variegated foliage, ''Pteris cretica'' var. ''albolineata'', is also widely used, brightening shade gardens. Both types thrive year round outdoors in subtropical climates, such as California. With a minimum temperature of , both require protection from frost, though the species is hardier and can be grown outdoors during the summer months in cold climates. The species, and the variety ''P. cretica'' var. ''albolineata'' ( syn. ''P. nipponica''), have both gained the Royal Horticultural Society's Award of Garden Merit. A relictual presen ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coprosma
''Coprosma'' is a genus of flowering plants in the family Rubiaceae. It is found in New Zealand, Hawaiian Islands, Borneo, Java, New Guinea, islands of the Pacific Ocean to Australia and the Juan Fernández Islands. Description The name ''Coprosma'' means "smelling like dung" and refers to the smell (methanethiol) given out by the crushed leaves of a few species. Many species are small shrubs with tiny evergreen leaves, but a few are small trees and have much larger leaves. The flowers have insignificant petals and are wind-pollinated, with long anthers and stigmas. Most species are dioecious, but some (particularly those native to New Zealand) species can sometimes have individuals with perfect flowers. Natural hybrids are common. The fruit is a non-poisonous juicy berry, most often bright orange (but can be dark red or even light blue), containing two small seeds. The orange fruit of the larger species were eaten by Māori children, and are also popular with birds. It is said ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broussaisia
''Broussaisia arguta'', the kanawao, is a species of perennial flowering plant in the ''Hydrangea'' family, Hydrangeaceae, that is endemic to Hawaii. It is the only species in the monotypic genus ''Broussaisia''. Kanawao is a widespread species occurring in mesic and wet forests on all of the main Hawaiian Islands. It is a dioecious, evergreen plant that either grows as a shrub or a tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are .... The obovate leaves are long and wide with finely serrated margins. Relationship to other Organisms The ''Orthotylus broussaisia'' (''O. broussaisiae'') from Kauai feeds on ''Broussaisia arguta''. Although there has been extensive research on ''Broussaisia arguta'', only the ''Orthotylus broussaisiae'' species has been found feeding ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rubus Hawaiensis
''Rubus hawaiensis'', also called the ''Ākala'', is one of two species (with '' R. macraei'') commonly known as Hawaiian raspberry, endemic to Hawaii. It is found on the islands of Kauai, Molokai, Maui, O'ahu, and Hawaii in mesic to wet forest at elevations of . In most areas it is not very common, but in some places (such as the upper Koolau Gap in Haleakalā and Laupāhoehoe Natural Area Reserve) it can be a dominant member of the understory vegetation. Although superficially similar to the other Hawaiian species, '' Rubus macraei'', the two are believed to be derived from separate dispersals to Hawaii. Description ''Rubus hawaiensis'' is a deciduous shrub, typically growing as a clump of erect or (when longer) arching canes, long. The leaves are compound, with three leaflets. The fruit is red, large (up to long and wide), and edible but not often eaten, as it is sour and somewhat bitter. Although frequently described as prickle-free ("thornless"), and often used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Understory
In forestry and ecology, understory (American English), or understorey (Commonwealth English), also known as underbrush or undergrowth, includes plant life growing beneath the forest canopy without penetrating it to any great extent, but above the forest floor. Only a small percentage of light penetrates the canopy so understory vegetation is generally shade-tolerant. The understory typically consists of trees stunted through lack of light, other small trees with low light requirements, saplings, shrubs, vines and undergrowth. Small trees such as holly and dogwood are understory specialists. In temperate deciduous forests, many understory plants start into growth earlier in the year than the canopy trees, to make use of the greater availability of light at that particular time of year. A gap in the canopy caused by the death of a tree stimulates the potential emergent trees into competitive growth as they grow upwards to fill the gap. These trees tend to have straight tru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metrosideros Polymorpha
''Metrosideros polymorpha'', the ''ōhia lehua'', is a species of flowering evergreen tree in the myrtle family, Myrtaceae, that is endemic to the six largest islands of Hawaii. It is a highly variable tree, being tall in favorable situations, and a much smaller prostrate shrub when growing in boggy soils or directly on basalt. It produces a brilliant display of flowers, made up of a mass of stamens, which can range from fiery red to yellow. Many native Hawaiian traditions refer to the tree and the forests it forms as sacred to Pele, the volcano goddess, and to Laka, the goddess of hula. Ōhia trees grow easily on lava, and are usually the first plants to grow on new lava flows. It is a common misconception that the word ''ōhia'' is used to refer to the tree and that the word ''lehua'' refers only to its flowers. ''The Hawaiian Dictionary'' (Pukui and Elbert 1986: 199) defines ''lehua'' with these words: "The flower of the ''ōhia'' tree... ''also the tree itself'' mphas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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