Hymenogyne

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Hymenogyne
Systematics
Eudicotyledons
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Midday flowers (Aizoaceae)
Subfamily : Ruschioideae
Genre : Hymenogyne
Scientific name
Hymenogyne
Haw.

Hymenogyne is a genus of plants fromthe afternoon flower family (Aizoaceae). The botanical name of the genus is derived from the Greek words hymen for 'skin' and gyne for 'woman' and probably refers to the apparently winged seeds.

description

The species of the genus Hymenogyne grow as annual plants , with the entire plant consisting of a powerful dichasium . The flat, moderately succulent leaves have bladder cells along the edges of the leaves . The leaves of a pair of leaves form an open sheath. The homogeneous epidermis often contains a few tannin cells and wax flakes.

The ivory-colored to yellow flowers have a diameter of up to 3 centimeters. Their petals are smooth along their edges. The stamens are flattened and ciliate at their base. The scars that have grown together at their base form a stalk. The recumbent, eight to twelve-fold fruits contain two very large, kidney-shaped, dark brown, laterally flattened seeds with a papillary seed coat . The two seeds are separated from each other by a false septum. When ripe, the chambers break along the false septum into two disintegrated fruits , each with one seed. The septum and false septum form a cartilaginous wing that surrounds the seed. The flowering period extends from September to November.

The chromosome number is .

Systematics and distribution

The genus Hymenogyne is common in South Africa in the western districts of the Western Cape Province . It grows in sandy places with winter precipitation amounts of more than 400 millimeters annually.

The first description of the genus by Adrian Hardy Haworth was published in 1821. The genus Hymenogyne includes the following species:

proof

literature

  • Heidrun EK Hartmann (Ed.): Illustrated Handbook of Succulent Plants: Aizoaceae AE . Springer Verlag, Berlin / Heidelberg / New York 2001, ISBN 3-540-41691-9 , pp. 131-133 .
  • Gideon Smith et al. a. (Ed.): Mesembs of the World: Illustrated Guide to a Remarkable Succulent Group . Briza Publications, 1998, ISBN 1-875093-13-3 , pp. 74-75 .

Individual evidence

  1. ^ Revisiones Plantarum Succulentarum . London 1821, p. 192 ( online ).

further reading

  • HD Ihlenfeldt, M. Gerbaulet: Investigations into the inventory of characteristics and the taxonomy of the genera Apatesia NEBr., Carpanthea NEBr., Conicosia NEBr., Herrea Schwantes and Hymenogyne Haw. (Mesembryanthemaceae Fenzl.) . In: Botanical yearbooks for systematics . Volume 111, Number 4, 1990, pp. 457-498.

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