Tourniaceae ( lat. Thurniaceae ) - a family of plants included in the order of the Poaceae ; includes 4 species in 2 genera , distributed mainly in the tropical and subtropical regions of America , Africa , South and Southeast Asia , Australasia .
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 Prionium serratum | |||||||||||||||||
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Thurniaceae Engl. | |||||||||||||||||
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Thurnia Hook.f. - Turkey | |||||||||||||||||
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Content
Botanical Description
Representatives of the genus are large perennial rhizome herbs up to 1 m high.
Stems - with a diameter over 1 cm; smooth, thick, trihedral or tetrahedral.
The leaves are alternate, usually only basal, with short open sheaths . Leaf blades are long, linear, flat or grooved, leathery, 1.5-3 cm wide with smooth or sharply serrated edges.
The flowers are small, nondescript, bisexual, collected in 1-2 (or more) very dense, large, spherical or oblong, apical heads up to 6 cm in diameter, at the base of which there are long, covering leaves deflected downward. There are six stamens , in two circles, free. Perianth consists of six free segments located in two circles, remaining with the fruits.
The fruit is a loculicidal three-nodule capsule up to 1.5 cm long, with three spindle-shaped spike-shaped seeds at both ends. The embryo is small, more or less cylindrical, surrounded by a plentiful mealy starchy endosperm .
Classification
Taxonomy
In the APG II system (2003), this family is included in the order of Poales clades of Commelinids of the Monocotyledones class.
In the APG system (1998), the genera belonging to this family were separated into their own families ( Prioniaceae and Thurniaceae ) and Poales were included in the order.
The Kronquist system (1981) placed the Thurniaceae family in the Juncales order of the Liliopsida class Commelinidae .
The Wettstein system (1935) placed the Thurniaceae family in the Liliiflorae order.
Childbirth
According to the database of The Plant List (as of July 2016), the family includes 2 genera and 4 species [2] :
- Prionium E. Mey.
- Thurnia Hook.f. typus - Turkey
Notes
- β For the conventionality of indicating the class of monocotyledons as a superior taxon for the plant group described in this article, see the APG Systems section of the Monocotyledonous article .
- β Thurniaceae (English) . The Plant List . Version 1.1. (2013). Date of treatment July 27, 2016.
Links
- Tournament (English) : information on the GRIN website. (English) (Retrieved April 18, 2009)
- Tournament (English) information on the site " Encyclopedia of Life " (EOL). (English) (Retrieved April 18, 2009)