Joinvillea

Joinvillea
	Joinvillea plicata
Systematics
Class :	Bedecktsamer (Magnoliopsida)
	Monocots
	Commelinids
Order :	Sweet grass (Poales)
Family :	Joinvilleaceae
Genre :	Joinvillea
Scientific name of the family
	Joinvilleaceae
	Toml. & ACSm.
Scientific name of the genus
	Joinvillea
	Gaudich. ex Brongn. & Gris

Joinvillea ascendens

The Joinvillea are the only genus of plants of the Joinvilleaceae family in the order of the sweet grass-like (Poales) within the monocot plants . The small family contains only two to four species. The Joinvillea species are found in the tropics from the Malay Peninsula to the Pacific Islands .

description

Habit and leaves

The Joinvillea species are very large, grass-like, perennial, herbaceous plants ; they are among the three largest herbaceous plants in this area with heights of 3 to 5 meters. The stems are not branched. They have sympodial rhizomes .

The alternate, in two rows on stalks arranged leaves are simple, sessile, network- and parallel-veined and have a serrated edge. There are tubular leaf sheaths that do not completely enclose the stem, and there are ligules . The stomata are paracytic.

Inflorescences and flowers

Many flowers are grouped together in terminal, branched, panicle inflorescences . The small, hermaphrodite flowers are threefold. There are six free bracts available; they are green or off-white (brownish). There are two circles with three free, fertile stamens each. The three-cell pollen grains are aperturat. Three carpels have become a top permanent ovary grown, with three styluses that can be grown in part, and three scars. Pollination takes place by the wind ( anemophilia ).

Fruits and seeds

There are drupes formed containing a stone core (but one to three seeds?). The seeds contain a floury endosperm with starch .

Ingredients and chromosome numbers

It is silica incorporated in the form of silica bodies. Starch is stored in the seeds in the endosperm . The number of chromosomes is n = 18.

Systematics and distribution

The Joinvillea species are found in the tropics from the Malay Peninsula to the Pacific Islands .

Previously the genus Joinvillea was in the family of the Flagellariaceae Dum. included as a third genus. The closest related is the Ecdeiocoleaceae family .

The first description of the genus Joinvillea was made in 1861 by Charles Gaudichaud-Beaupré in Adolphe Brongniart & Jean Antoine Arthur Gris : Bulletin de la Société Botanique de France , 8, 268. The family was Joinvilleaceae 1970 by Philip Barry Tomlinson and Albert Charles Smith in Joinvilleaceae , a New Family of Monocotyledons. In: Taxon , Volume 19, No. 6, pp. 887-889.

Joinvillea Gaudich. ex Brongn. & Gris is the only genus in the Joinvilleaceae family. It contains two to four types:

Joinvillea ascendens Gaudich. ex Brongn. & Gris (Syn .: Joinvillea gaudichaudiana Brongn. & Gris ): It occurs on the Hawaiian Islands.
Joinvillea borneensis Becc. (Syn .: Joinvillea ascendens subsp. Borneensis (Becc.) Newell , Joinvillea malayana Ridl. ): The homeland ranges from the western Indonesian archipelago to the Caroline Islands .
Joinvillea bryanii Christoph. (Syn .: Joinvillea elegans subsp. Bryanii ( Christoph. ) H.St.John ): This species occurs only on Samoa .
Joinvillea plicata (Hook. F.) Newell & Stone (Syn .: Flagellaria plicata Hook. F. , Joinvillea elegans Gaudich. Ex Brongn. & Gris ): It is distributed from the Solomon Islands to islands in the southwestern Pacific.

swell

The Joinvilleaceae family on the AP website . (Sections systematics and description)
The Joinvilleaceae family at DELTA by L. Watson & MJ Dallwitz. (Section description)
Fabian A. Michelangeli, Jerrold I. Davis, Dennis Wm. Stevenson: Phylogenetic relationships among Poaceae and related families as inferred from morphology, inversions in the plastid genome, and sequence data from the mitochondrial and plastid genomes. In: American Journal of Botany , Volume 90, 2003, pp. 93-106. (Section systematics)

Individual evidence

^ ^A ^b PB Tomlinson, AC Smith: Joinvilleaceae, a New Family of Monocotyledons. In: Taxon , Volume 19, No. 6, 1970, pp. 887-889. JSTOR 1218303
^ Joinvilleaceae in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.

Web links

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

[Tomlinson1970-1] A ^b PB Tomlinson, AC Smith: Joinvilleaceae, a New Family of Monocotyledons. In: Taxon , Volume 19, No. 6, 1970, pp. 887-889. JSTOR 1218303

[GRIN-2] Joinvilleaceae in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.