Convolute (botany)

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Zantedeschia aethiopica , showing convolute spathe wound around bud Zantedeschia aethiopica convolute spathe wound around bud IMG 5887.JPG
Zantedeschia aethiopica , showing convolute spathe wound around bud
Base of tussock of Thamnochortus species, showing convolute leaf sheaths Thamnochortus species tussock showing convolute leaf sheaths IMG 5882.JPG
Base of tussock of Thamnochortus species, showing convolute leaf sheaths
Cross section through budding spadix and convolute spathe of Zantedeschia aethiopica Cross section through convolute bud spathe of Zantedeschia aethiopica IMG 5894.jpg
Cross section through budding spadix and convolute spathe of Zantedeschia aethiopica

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". [1] 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. [2] However in structures such as a spathe, where there is only one element, a convolute (or "convolutive") element is spirally wrapped around itself or its branch. [1] This is common in the buds of leaves and inflorescences of members of the family Araceae.

Restionaceae family of plants

The Restionaceae, also called restiads and restios, are a family of annual or perennial rush-like flowering plants native to the Southern Hemisphere; they vary from a few centimeters to 3 m in height. Following the 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 Late Cretaceous period, when the southern continents were still part of Gondwana.

Araceae family of plants

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 114 genera and about 3750 known species is most diverse in the New World tropics, although also distributed in the Old World tropics and northern temperate regions.

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Cupressaceae family of plants

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Blunt (cigar)

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Phyllotaxis Arrangement of leaves on the stem of a plant

In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a distinctive class of patterns in nature.

<i>Cathaya</i> genus of plants

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<i>Afrocarpus</i> genus of plants

Afrocarpus is a genus of conifers belonging to the family Podocarpaceae. Two to six species are recognized. They are evergreen trees native to Africa. Afrocarpus was designated a genus in 1989, when several species formerly classified in Podocarpus and Nageia were reclassified.

<i>Cunninghamia</i> genus of plants

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Glossary of leaf morphology

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Commelinaceae family of plants

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Sideroxylon salicifolium, commonly called white bully or willow bustic, is a species of flowering plant native to Florida, the West Indies and Central America. It has also been considered a member of the genus Dipholis, with the binomial Dipholis salicifolia. Its specific epithet is derived from the Latin salix 'willow' and folia 'leaf'.

This glossary of botanical terms is a list of terms relevant to botany and plants in general. Terms of plant morphology are included here as well as at the related Glossary of plant morphology and Glossary of leaf morphology. See also List of Latin and Greek words commonly used in systematic names. You can help by adding illustrations that assist an understanding of the terms.

<i>Persoonia cornifolia</i> species of plant

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Whorl (botany)

In botany, a whorl or verticil is an arrangement of sepals, petals, leaves, stipules or branches that radiate from a single point and surround or wrap around the stem. A whorl consists of at least three elements; a pair of opposite leaves is not called a whorl.

<i>Pterostylis hamata</i> species of plant

Pterostylis hamata, commonly known as the southern hooked rustyhood, is a plant in the orchid family Orchidaceae and is endemic to eastern Australia. It has a rosette of leaves and between two and twelve transparent flowers with green and brown markings, a thick, brown, insect-like labellum and dished lateral sepals.

Pterostylis ferruginea, commonly known as the Bangham rustyhood, is a plant in the orchid family Orchidaceae and is endemic to the border area between South Australia and Victoria. It has a rosette of leaves and when flowering, up to ten upright, dark green and translucent white flowers which have an insect-like labellum.

<i>Spiranthes australis</i>

Spiranthes australis, commonly known as austral ladies tresses, is a species of orchid endemic to eastern Australia. It has up to about ten leaves at the base of a flowering stem with up to sixty small pink and white flowers spirally arranged around it.

References

  1. 1 2 Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928
  2. Dyer, R. Allen, The Genera of Southern African Flowering Plants”. ISBN   0 621 02854 1, 1975