Tetrameles nudiflora

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Tetrameles nudiflora
Preah Khan - S Temple (4207154318) .jpg

Tetrameles nudiflora

Systematics
Rosids
Eurosiden I
Order : Pumpkin-like (Cucurbitales)
Family : Tetramelaceae
Genre : Tetrameles
Type : Tetrameles nudiflora
Scientific name of the  genus
Tetrameles
R.Br.
Scientific name of the  species
Tetrameles nudiflora
R.Br.

Tetrameles nudiflora is a large tree in the family Tetramelaceae, it is the only species in the genus Tetrameles . It is native to Southeast Asia , Cambodia, Vietnam, Myanmar , Laos to Malaysia and Bangladesh .

description

Vegetative characteristics

Tetrameles nudiflora grows as a deciduous tree up to 45 meters high. Very high buttress roots are formed and the trunk diameter can be up to 2 meters. The bark is brownish to greyish and relatively smooth.

The alternate and longer-stalked leaves are arranged at the branch ends. They are round to egg-shaped and usually heart-shaped, pointed to pointed and entire to toothed or short-lobed. The leaves are up to 22 centimeters long and 14 centimeters wide, the petiole is 7-15 centimeters long. They are weak on top and densely hairy on the underside. The nerve is three to five-fold.

Generative characteristics

Tetrameles nudiflora is dioecious segregated sex diocesan . The stalked and terminal, unisexual inflorescences are each multi-flowered panicles with fine-haired rachis , the female ones are pendulous and not very branched. The unisexual, almost sessile and small flowers are usually four-fold with a simple flower cover, without petals. They stand individually or in small groups on the inflorescences. The female flowers are green, the male yellowish. The male flowers, with a small flower cup , have small bracts and a short overgrown calyx with four elongated lobes and usually 4 long stamens and there is often a small, greatly reduced, cross -shaped and discus-shaped pestle. The female flowers, have a constant with the under, unilocular ovary fused, cup-shaped or urn, weak tetragonal and glandular outside and slightly hairy cup with small peaks corners. There are usually 4 protruding styluses with a longitudinal fold and tongue-shaped scars .

Small, brownish and multi-veined, urn-shaped and glandular capsule fruits are formed, to which the calyx tips and style adhere. They are 5–6 millimeters in size and they open at the top through a rounded pore, which is formed by the withering and sagging stylus. The many, very small, elongated seeds are brown and up to about 1 millimeter in size.

  • Leaves of Tetrameles nudiflora

  • Buttress roots

  • Male inflorescences

  • Female inflorescences

Systematics

The genus Tetrameles was first named (noun seminudum) in 1826 by Robert Brown in Observations on the structure and affinities of the more remarkable plants p. 25 and also in Narrative of travels and discoveries in Northern and Central Africa, App. XXII: 230, and the first description of the genus Tetrameles and the species Tetrameles nudiflora was made in 1838 in JJ Bennett, Plantae Javanicae Rariores 79, pl. 17th

literature

  • CGGJ van Steenis: Flora Malesiana. Ser. I, Vol. 4, 1953, p. 385 ff, online at biodiversitylibrary.org.
  • Klaus Kubitzki : The Families and Genera of Vascular Plants. Vol. X: Flowering Plants. Eudicots , Springer, 2011, ISBN 978-3-642-14396-0 , pp. 175 ff.

Web links

Commons : Tetrameles nudiflora  - collection of images, videos and audio files