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Prasophyllum
''Prasophyllum'', commonly known as leek orchids, is a genus of about 140 species of flowering plants in the orchid family, Orchidaceae and is found in Australia and New Zealand. The Australian species are found in all states but have not been recorded in the Northern Territory. The common name arises from their having a hollow, leek- or onion-like leaf. Some species only flower after summer fires and have flowers similar to those of ''Xanthorrhoea'' which flower at the same time, suggesting that they employ the same pollinating insects. Leek orchids are similar to those in the genus ''Genoplesium'' except that the free part of the leaf is cylindrical (flat in ''Genoplesium'') and the labellum has a solid (rather than flexible) connection to the column. They range in size from the little laughing leek orchid ('' P. gracile'') at about to the king leek orchid ('' P. regium'') which grows up to tall. Description Orchids in the genus ''Prasophyllum'' are terrestrial, perennial, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prasophyllum (labelled 2)
''Prasophyllum'', commonly known as leek orchids, is a genus of about 140 species of flowering plants in the orchid family, Orchidaceae and is found in Australia and New Zealand. The Australian species are found in all states but have not been recorded in the Northern Territory. The common name arises from their having a hollow, leek- or onion-like leaf. Some species only flower after summer fires and have flowers similar to those of '' Xanthorrhoea'' which flower at the same time, suggesting that they employ the same pollinating insects. Leek orchids are similar to those in the genus '' Genoplesium'' except that the free part of the leaf is cylindrical (flat in ''Genoplesium'') and the labellum has a solid (rather than flexible) connection to the column. They range in size from the little laughing leek orchid ('' P. gracile'') at about to the king leek orchid ('' P. regium'') which grows up to tall. Description Orchids in the genus ''Prasophyllum'' are terrestrial, perennial, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prasophyllum Gracile
''Prasophyllum gracile'', commonly known as the little laughing leek orchid, is a species of orchid endemic to the south-west of Western Australia. It is one of the most common and widespread orchids in the south-west and has a single smooth, tube-shaped leaf and up to forty or more, usually yellowish-green flowers. Description ''Prasophyllum gracile'' is a terrestrial, perennial, deciduous, herb with an underground tuber and a single smooth green, sometimes reddish, tube-shaped leaf long and about in diameter near the base. Between five and forty or more flowers are arranged on a flowering spike high. The flowers are yellowish-green, sometimes purplish, long and about wide. The ovary is an oval shape, about long and the dorsal sepal is a narrow egg shape or lance-shaped, about long, concave and more or less pointed. The lateral sepals are narrow lance-shaped about long, joined for about half their length and have erect, pointed tips about long. The petals are about l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prasophyllum Petilum
''Prasophyllum petilum'', commonly known as the Tarengo leek orchid, is a species of orchid endemic to eastern Australia. It has a single tubular, green leaf and up to eighteen pinkish mauve to greenish flowers, well-spaced along a slender flowering stem. It is a small orchid, difficult to locate, generally growing in taller grasses. Description ''Prasophyllum petilum'' is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tube-shaped, dark green leaf. The leaf has a purplish base and is long and wide. Between five and eighteen, sometimes fragrant flowers are crowded along a flowering spike about long. The flowers are pinkish mauve to greenish and wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is a narrow egg-shape to lance-shape, long and about wide. The lateral sepals are about the same length as the dorsal sepal but narrower and joined to each other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prasophyllum Regium
''Prasophyllum regium'', commonly known as the king leek orchid, is a species of orchid endemic to the south-west of Western Australia. It has a single, unusually thick tubular leaf and up to one hundred relatively large, greenish-brown or burgundy-coloured flowers. It is one of the tallest leek orchids, sometimes growing to a height of . Description ''Prasophyllum regium'' is a terrestrial, perennial, deciduous, herb with an underground tuber and a single fleshy, green to blackish, tube-shaped leaf long and wide. Between fifty and one hundred or more flowers are arranged along a flowering spike long, reaching to a height of . The flowers are greenish-brown to burgundy-coloured, long and about wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is long and wide and the lateral sepals are long, wide and fused to each other. The petals are long, wide and curve forwards. The labell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genoplesium
''Genoplesium'' commonly known as midge orchids, is a genus of about 50 species of flowering plants in the orchid family, Orchidaceae and is found in Australia, New Zealand and New Caledonia. Midge orchids are terrestrial herbs with a single leaf at the base of the plant. They are similar to orchids in the genus ''Prasophyllum'' in that plants without flowers have a hollow, onion-like leaf. The flowers are small but often scented and attractive to their insect pollinators. There is disagreement about which species belong to this genus and some taxonomists suggest that most belong in the genus ''Corunastylis''. Description Orchids in the genus ''Genoplesium'' are terrestrial, perennial, deciduous, sympodial herbs, usually with a few inconspicuous, fine roots and a pair of more or less spherical tubers. The tubers are partly covered by a protective fibrous sheath which extends to the soil surface. Replacement tubers form at the end of short root-like stolons. Orchids in this genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resupination
Resupination is derived from the Latin word ''resupinus'', meaning "bent back with the face upward" or "on the back". "Resupination" is the noun form of the adjective "resupine" which means "being upside-down, supine or facing upward". The word "resupinate" is generally only used in a botanical context – in everyday language, "supine" has a similar meaning. In botany, resupination refers to the "twisting" of flowers or leaves through about 180° as they open. Resupinate leaves have the petiole or "stalk" twisted - resupinate flowers twist as they open. Botanical examples Alstroemeriaceae Plants in the genus ''Alstroemeria'' have more or less resupinate leaves. Orchidaceae The flower of a typical plant in the orchid family Orchidaceae has three sepals and three petals. One petal, called the labellum, "lip" or "tongue", is typically quite different from the other two. It usually functions to attract an insect pollinator. As an orchid flower bud develops, the attachment o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Brown (Scottish Botanist From Montrose)
Robert Brown (21 December 1773 – 10 June 1858) was a Scottish botanist and paleobotanist who made important contributions to botany largely through his pioneering use of the microscope. His contributions include one of the earliest detailed descriptions of the cell nucleus and cytoplasmic streaming; the observation of Brownian motion; early work on plant pollination and fertilisation, including being the first to recognise the fundamental difference between gymnosperms and angiosperms; and some of the earliest studies in palynology. He also made numerous contributions to plant taxonomy, notably erecting a number of plant families that are still accepted today; and numerous Australian plant genera and species, the fruit of his exploration of that continent with Matthew Flinders. Early life Robert Brown was born in Montrose, Angus, Montrose on 21 December 1773, in a house that existed on the site where Montrose Library currently stands. He was the son of James Brown (Scottis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunica (biology)
In biology, a tunica (, ; ) is a layer, coat, sheath, or similar covering. The word came to English from the New Latin of science and medicine. Its literal sense is about the same as that of the word ''tunic'', with which it is cognate. In biology one of its senses used to be the taxonomic name of a genus of plants, but the nomenclature has been revised and those plants are now included in the genus ''Petrorhagia''. In modern biology in general, ''tunica'' occurs as a technical or anatomical term mainly in botany and zoology. It usually refers to membranous structures that line or cover particular organs. In many such contexts ''tunica'' is used interchangeably with ''tunic'' according to preference. An organ or organism that has a tunic(a) may be said to be ''tunicate'', as in a ''tunicate bulb''. This adjective ''tunicate'' is not to be confused with the noun ''tunicate'', which refers to a member of the subphylum '' Tunicata''. Botanical and related usages In botany there are s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stolon
In biology, stolons (from Latin '' stolō'', genitive ''stolōnis'' – "branch"), also known as runners, are horizontal connections between organisms. They may be part of the organism, or of its skeleton; typically, animal stolons are external skeletons. In botany In botany, stolons are stems which grow at the soil surface or just below ground that form adventitious roots at the nodes, and new plants from the buds. Stolons are often called runners. Rhizomes, in contrast, are root-like stems that may either grow horizontally at the soil surface or in other orientations underground. Thus, not all horizontal stems are called stolons. Plants with stolons are called stoloniferous. A stolon is a plant propagation strategy and the complex of individuals formed by a mother plant and all its clones produced from stolons form a single genetic individual, a genet. Morphology Stolons may or may not have long internodes. The leaves along the stolon are usually very small, but in a few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glabrous
Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part of a plant or animal, or be due to loss because of a physical condition, such as alopecia universalis in humans, which causes hair to fall out or not regrow. In botany Glabrousness or otherwise, of leaves, stems, and fruit is a feature commonly mentioned in plant keys; in botany and mycology, a ''glabrous'' morphological feature is one that is smooth and may be glossy. It has no bristles or hair-like structures such as trichomes. In anything like the zoological sense, no plants or fungi have hair or wool, although some structures may resemble such materials. The term "glabrous" strictly applies only to features that lack trichomes at all times. When an organ bears trichomes at first, but loses them with age, the term used is ''glabrescent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed on the axis of a plant. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes. One can also define an inflorescence as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern. The stem holding the whole inflorescence is called a peduncle. The major axis (incorrectly referred to as the main stem) above the peduncle bearing the flowers or secondary branches is called the rachis. The stalk of each flower in the inflorescence is called a pedicel. A flower that is not part of an inflorescence is called a solitary flower and its stalk is al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbaceous Plant
Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials. Definitions of "herb" and "herbaceous" The fourth edition of the ''Shorter Oxford English Dictionary'' defines "herb" as: #"A plant whose stem does not become woody and persistent (as in a tree or shrub) but remains soft and succulent, and dies (completely or down to the root) after flowering"; #"A (freq. aromatic) plant used for flavouring or scent, in medicine, etc.". (See: Herb) The same dictionary defines "herbaceous" as: #"Of the nature of a herb; esp. not forming a woody stem but dying down to the root each year"; #"BOTANY Resembling a leaf in colour or texture. Opp. scarious". Botanical sources differ from each other on the definition of "herb". For instance, the Hunt Institute for Botanical Documentation includes the condition "when persisting over more than one growing season, the parts o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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