Mock hemp
| Mock hemp | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Datisca cannabina pinnate leaves . |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name of the family | ||||||||||||
| Datiscaceae | ||||||||||||
| Dumort. | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Datisca | ||||||||||||
| L. |
Datisca ( Datisca ) is the only genus of the family of datisca plants (Datiscaceae) within the order of the gourd-like (Cucurbitales). There are only two species in arid areas; the genus Datisca has a disjoint area .
description
.jpg)
Appearance and leaves
Datisca species are tall, perennial herbaceous plants that reach heights of up to 2 meters. They look very similar to hemp ( cannabis ), hence the German name. The green parts of the plant are bare. The alternate, stalked leaves have imparipinnate leaf blades. The leaf margins of the leaflets are serrated. The stomata are anomocytic. Stipules are missing.
Inflorescences and flowers
On long, leafy branches there are terminal, bundled inflorescences . Datisca cannabina is dioecious separate sexes ( dioecious ), Datisca glomerata androdioecan . Petals are missing. Male flowers have three to nine sepals and eight to 25 free, fertile stamens . The hermaphrodite flowers have three to eight sepals and three to five free, fertile stamens and the ovary as in the female flowers. The stamens are short. In the female flowers are three to eight sepals and three to five carpels have become an under constant ovary fused with an equal number of free pencils as carpels. Each ovary chamber contains 30 to 100 (“many”) anatropic, bitegmic, tenuinucellate ovules . Pollination takes place by the wind ( anemophilia ).
Fruits and seeds
They form stalked, elongated, leathery, three- to four-ribbed (rarely five-ribbed) capsule fruits , which begin to open at the upper end between the then still existing pistils and contain many (30 to 100) small seeds. The seeds contain more or less no endosperm . The straight embryo is well developed, but small and has two oil-bearing seed leaves ( cotyledons ).
Chromosome numbers and ingredients
The basic chromosome number is x = 11. At flavonoids were kaempferol and quercetin proved.
Systematics and distribution
The genus Datisca and thus this family has a disjoint area with one species in southeast Europe and western Asia and the other in western North America . They each thrive in arid areas.
In the genus Datisca and thus also the family of the pseudo hemp plants (Datiscaceae) there are only two species:
- Datisca cannabina L. (including Datisca nepalensis D.Don ): The pinnate leaves are 15 to 30 cm long with five to eleven stalked, 2.5 to 4 cm long, serrated leaflets. The distribution area extends from the eastern Mediterranean ( Crete , Turkey , Lebanon , northern Iran ) to the Himalayas : from Kazakhstan to Nepal , including Afghanistan , western Pakistan and western China . The female plants in particular look decorative and are thereforeplantedas rare ornamental plants.
- Datisca glomerata (C.Presl) Baillon : It is distributed in western North America in California and Nevada .
In the past, the taxa of the Tetramelaceae also belonged to the pseudo-hemp family (Datiscaceae) . Both families are most closely related to the Begoniaceae .
swell
- The family of Datiscaceaee in APWebsite. (Sections Description and Systematics)
- The Datiscaceae family at DELTA. (Section description)
- Mohammad Aamin Siddiqi: The Datiscaceae Family in the Flora of Pakistan . (Section description)
- Willis Linn Jepson: A Flora of California: Volume II Capparidaceae to Cornacea. 1936, page 537. Scanned in. (Section description)
