|
Convolute (botany)
Convolute as a verb literally means to "roll together" or "roll around", from the Latin ''convolvere''. In general application the word can mean to "tangle" or "complicate", but in botanical descriptions convolute usually is an adjective from the Latin ''convolutus'', meaning "rolled around".Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928 It commonly refers to a special class of imbricate structures — those where the overlapping edges of leaves, scales or similar elements are spirally wrapped, each scale having one edge within the previous scale and one outside the next scale. In the family Restionaceae the leaf sheaths commonly are convolute in this sense.Dyer, R. Allen, The Genera of Southern African Flowering Plants”. {{ISBN, 0 621 02854 1, 1975 However in structures such as a spathe, where there is only one element, a convolute (or "convolutive") element is spirally wrapped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zantedeschia Aethiopica Convolute Spathe Wound Around Bud IMG 5887
''Zantedeschia'' is a genus of eight species of herbaceous, perennial plant, perennial, flowering plants in the family (biology), family Araceae, native plant, native to southern Africa from South Africa north to Malawi. The genus has been introduced on all continents except Antarctica. Common names include arum lily for ''Z. aethiopica'' and calla and calla lily for ''Z. elliottiana'' and ''Z. rehmannii'', although members of the genus are neither true lily, lilies of Liliaceae, true ''Arums'', nor true ''Callas'' (related genera in Araceae). The colourful flowers and leaves of both species and cultivars are greatly valued and commonly grown as ornamental plants. Description ''Zantedeschia'' species are rhizome, rhizomatous, herbaceous, perennial plants with some species, e. g., ''Zantedeschia aethiopica'', growing to 1.2m tall, while ''Zantedeschia rehmannii'' does not exceed 60 cm in height, growing in clumps or clusters. Roots: Contractile, emerging from the top of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thamnochortus Species Tussock Showing Convolute Leaf Sheaths IMG 5882
''Thamnochortus'' is a group of plants in the Restionaceae described as a genus in 1767.Bergius, Peter Jonas. 1767. Descriptiones Plantarum ex Capite Bonae Spei 353 The entire genus is endemic to Cape Province in South Africa. ; Species ; formerly included moved to other genera: '' Cannomois Hypodiscus Restio Rhodocoma ''Rhodocoma'' is a group of plants in the Restionaceae described as a genus in 1836.Nees von Esenbeck, Christian Gottfried Daniel. 1836. Introduction to a Natural System of Botany 450 The entire genus is endemic to South Africa (Cape Province an ... Staberoha'' References Restionaceae Endemic flora of South Africa Flora of the Cape Provinces Fynbos Poales genera {{Poales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross Section Through Convolute Bud Spathe Of Zantedeschia Aethiopica IMG 5894
A cross is a geometrical figure consisting of two intersecting lines or bars, usually perpendicular to each other. The lines usually run vertically and horizontally. A cross of oblique lines, in the shape of the Latin letter X, is termed a saltire in heraldic terminology. The cross has been widely recognized as a symbol of Christianity from an early period.''Christianity: an introduction'' by Alister E. McGrath 2006 pages 321-323 However, the use of the cross as a religious symbol predates Christianity; in the ancient times it was a pagan religious symbol throughout Europe and western Asia. The effigy of a man hanging on a cross was set up in the fields to protect the crops. It often appeared in conjunction with the female-genital circle or oval, to signify the sacred marriage, as in Egyptian amule ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imbricate
Aestivation or estivation is the positional arrangement of the parts of a flower within a flower bud before it has opened. Aestivation is also sometimes referred to as praefoliation or prefoliation, but these terms may also mean vernation: the arrangement of leaves within a vegetative bud. Aestivation can be an important taxonomic diagnostic; for example Malvaceae flower buds have valvate sepals, with the exception of the genera ''Fremontodendron'' and ''Chiranthodendron'', which have sometimes been misplaced as a result. Terminology The terms used to describe aestivation are the same as those used to describe leaf vernation. Classes of aestivation include: * ''crumpled'' * ''decussate Decussation is used in biological contexts to describe a crossing (due to the shape of the Roman numeral for ten, an uppercase 'X' (), ). In Latin anatomical terms, the form is used, e.g. . Similarly, the anatomical term chiasma is named aft ...'' * ''imbricate'' – overlapping ** ''con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Restionaceae
The Restionaceae, also called restiads and restios, are a family (biology), family of flowering plants native to the Southern Hemisphere; they vary from a few centimeters to 3 meters in height. Following the APG IV system, APG IV (2016): the family now includes the former families Anarthriaceae, Centrolepidaceae and Lyginiaceae, and as such includes 51 genera with 572 known species. Based on evidence from fossil pollens, the Restionaceae likely originated more than 65 million years ago during the Cretaceous, Late Cretaceous period, when the southern continents were still part of Gondwana.Bremer, K. (2002). "Gondwanan Evolution of the Grass Alliance of Families (Poales)." ''Evolution'', 56(7): 1374-1387 Description The family consists of tufted or rhizomatous, herbaceous plants belonging to a group of monocotyledons that includes several similar families, such as the Cyperaceae, sedges, Juncaceae, rushes, and Poaceae, grasses. They have green, photosynthetic stems and leaves that h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spathe
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate and ebracteolate, without bracts. Variants Some bracts are brightly-coloured and serve the function of attracting pollinators, either together with the perianth or instead of it. Examples of this type of bract include those of ''Euphorbia pulcherrima'' (poinsettia) and ''Bougainvillea'': both of these have large colourful bracts surrounding much smaller, less colourful flowers. In grasses, each floret (flower) is enclosed in a pair of papery bracts, called the lemma (lower bract) and pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araceae
The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe (or leaf-like bract). Also known as the arum family, members are often colloquially known as aroids. This family of 140 genera and about 4,075 known species is most diverse in the New World tropics, although also distributed in the Old World tropics and northern temperate regions. Many species display very decorative leaves and flowers, and they are widely used for gardening; popular as indoor plants and also outdoor plants where climates are mild, and winter freezes will not generally occur. However, some temperate species are also very popular in Mediterranean-climate gardening, or in moderately cool temperate zones, such as ''Zantedeschia''. Description Species within Araceae are often rhizomatous or tuberous, and the leaves nearly always contain calcium oxa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
