Thlaspi

Arable Hellerkraut ( Thlaspi arvense)

The Heller herbs ( Thlaspi ), also referred to as Täschelkräuter, are a genus of flowering plants in the family of cruciferous plants (Brassicaceae ). The few species are native to Eurasia and East Africa. The two species are native to Central Europe in many parts of the world neophytes, for example in North America.

  • 3.1 Literature
  • 3.2 Notes and references

Description

Vegetative characteristics

The Thlaspi species grow as herbaceous plants. Crushed plant smell often unpleasant. The plant parts can possess (plant hair ) depending on the type trichomes. The upright stems are unbranched or branched toward the tip.

The leaves are both in basal rosettes and distributed on the stem ( phyllotaxis ). The leaf blades are easy with wavy, serrated or smooth leaf margins. The for fruit ripening often wilted, basal leaves are petiolate, more or less long and the change-constant stem leaves are sessile. Stipules are not available.

Generative features

The racemose partial inflorescences contain only a few flowers. Up to fruit ripening to extend the inflorescence axes. The slender pedicels are sparrig at maturity, straight or slightly curved.

The hermaphrodite flowers are cruciform with double perianth. The four upright or ascending sepals are ovate or oblong. The four petals are usually spatulate and they can be nailed. The stamens are slightly broadened at the base. There are two or four nectar glands present, the central glands still missing. The upper permanent ovary contains 6-16 ovules. A stylus is sometimes barely recognizable and the scar is capitate.

There shall be pedunculated, elongated, inverted egg-shaped, inverted - heart-shaped or nearly spherical silicles, that is, they are more than three times as long as wide. The two bare flaps are winged. The Replum is round and the septum is completely formed. The seeds are wingless, plump and ovoid. The seed coat is coarse striped reticulate, honeycombed or concentrically and is not sticky - slimy when wet.

The basic chromosome number is x = 7

System

From the once very broad, heterogeneous genus Thlaspi some autonomous genres were recently separated. Thus the genera Microthlaspi and Noccaea, the latter includes most former Thlaspi species of Central European flora. The genus Thlaspi belongs to the tribe Thlaspideae in the family Brassicaceae.

The genus name Thlaspi was first published in 1753 by Carl Linnaeus in Species Plantarum. Thlaspi is derived from the Greek word Thalo, valley for compress and refers to the flattened silicles.

Today the genus Thlaspi contains only six annual species:

  • Leek Hellerkraut ( Thlaspi alliaceum L.)
  • Arable Hellerkraut ( Thlaspi arvense L.)
  • Thlaspi cerato carpon ( Pall. ) Murray: The home is the eastern Turkey, Kazakhstan, Afghanistan, Western Siberia and northern Mongolia.
  • Thlaspi huetii Boiss. The home is Georgia, Armenia and northeastern Turkey.
  • Thlaspi kochianum FKMey. , The home is the north-eastern Turkey.
  • Thlaspi oliveri Engl: The home is East Africa from Ethiopia to Tanzania.

No longer the genus Thlaspi in the narrow sense include, for example:

  • Stem Comprehensive Hellerkraut ( Microthlaspi perfoliatum (L.) FKMey, Syn. Thlaspi perfoliatum L.)
  • Mountain Hellerkraut ( Noccaea caerulescens (J. Presl & C. Presl ) FKMey, Syn. Thlaspi caerulescens J. Presl & C. Presl )
  • Calamine Hellerkraut ( Noccaea caerulescens subsp sylvestris ( Jord. ) ​​FKMey, Syn: .. Thlaspi calaminare ( Lej. ) Lej & Courtois. )
  • Mountain Hellerkraut ( Noccaea montana (L.) FKMey, Syn. Thlaspi montanum L.)
  • Round-leaved Hellerkraut ( Noccaea rotundifolia (L. ) Moench, syn: Thlaspi rotundifolium (L.) Gaudin )

Swell

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