Gouanieae

Gouanieae
	Branch with flowers of Gouania hillebrandii
Systematics
	Nuclear eudicotyledons
	Rosids
	Eurosiden I
Order :	Rose-like (rosales)
Family :	Buckthorn Family (Rhamnaceae)
Tribe :	Gouanieae
Scientific name
	Gouanieae
	Jacq.

Gouanieae are a tribe in the family of buckthorn plants (Rhamnaceae), to which six genera are assigned. Most of the representatives of the tribe grow in the tropics and subtropics of America, Asia and Africa.

description

Representatives of the tribe are mostly unreinforced, climbing shrubs, the representatives of the genus Crumenaria are tendrils forming herbaceous plants . The leaves grow alternately and are stalked and with entire margins. The vein is pinnate or palmate. The stipules usually fall off early. The ovary is subordinate and usually triple, less often two or fourfold. The nectar-forming disc is fleshy, star-shaped or pentagonal. The fruits are triple, mostly triple-lobed, elongated capsules that open lengthways, with each chamber containing a seed. The seed coat is leathery, an endosperm is present and fleshy. The outer pollen wall (exine) is grooved, network-like grooved, wrinkled or perforated.

The number of chromosomes for the genus Helinus is 2n = 22.

distribution

The representatives of the tribe grow in the tropics and subtropics of America, Asia and Africa, on Madagascar and on islands of the Indian Ocean .

Systematics and research history

Gouanieae is one of the eleven tribe of the buckthorn family (Rhamnaceae) with Gouania Jacq. as a type - genus . The tribe are assigned to six genera:

Alvimiantha Gray-Wilson
Crumenaria Mart.
Gouania Jacq.
Helinus E. Mey. ex Endl.
Pleuranthodes A. Weberb.
Reissekia Endl.

Gouania microcarpa leaves

Branches and leaves of Gouania meyenii

Fruit of Gouania vitifolia

Inflorescence of Helinus integrifolius

Individual evidence

^ ^A ^b D. Medan, C. Schiarend: Rhamnaceae in Klaus Kubitzki: The Families and Genera of Vascular Plants , Volume VI, p. 330
^ ^A ^b ^c JE Richardson, MF Fay, QCB Cronk, MW Chase: A Revision of the Tribal Classification of Rhamnaceae . In: Kew Bulletin . Vol. 55, No. 2 . Springer, 2000, p. 333 , doi : 10.2307 / 4115645 .
↑ D. Medan, C. ski Arend: Rhamnaceae in Klaus Kubitzki: The Families and Genera of Vascular Plants , Volume VI, page 325, 326
^ Gouanieae in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.

literature

Klaus Kubitzki (Ed.): The Families and Genera of Vascular Plants . Volume 6: Flowering Plants, Dicotyledons: Celastrales, Oxalidales, Rosales, Cornales, Ericales . Springer, Berlin / Heidelberg / New York 2004, ISBN 3-540-06512-1 , pp. 330 (English).
JE Richardson, MF Fay, QCB Cronk, MW Chase: A Revision of the Tribal Classification of Rhamnaceae . In: Kew Bulletin . Vol. 55, No. 2 . Springer, 2000, p. 311-340 , doi : 10.2307 / 4115645 .

Web links

Commons : Gouanieae - collection of images, videos and audio files

[Kubitzki330-1] A ^b D. Medan, C. Schiarend: Rhamnaceae in Klaus Kubitzki: The Families and Genera of Vascular Plants , Volume VI, p. 330

[Richardson333-2] A ^b ^c JE Richardson, MF Fay, QCB Cronk, MW Chase: A Revision of the Tribal Classification of Rhamnaceae . In: Kew Bulletin . Vol. 55, No. 2 . Springer, 2000, p. 333 , doi : 10.2307 / 4115645 .

[Kubitzki325-3] D. Medan, C. ski Arend: Rhamnaceae in Klaus Kubitzki: The Families and Genera of Vascular Plants , Volume VI, page 325, 326

[GRIN-4] Gouanieae in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.