Pale hornwort

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Pale hornwort
Pale Hornwort (Cerastium glutinosum)

Pale Hornwort ( Cerastium glutinosum )

Systematics
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Carnation family (Caryophyllaceae)
Subfamily : Alsinoideae
Genre : Horn herbs ( Cerastium )
Type : Pale hornwort
Scientific name
Cerastium glutinosum
Fr.

The pale hornwort ( Cerastium glutinosum ), also called sticky hornwort , is a species of plant in the carnation family (Caryophyllaceae).

Appearance

  • Cerastium glutinosum ( herbarium evidence )

  • Pale hornwort (inflorescence)

  • The lower part of the stem is only hairy without glands.

  • The uppermost stem leaves are only hairy without glands.

  • Open flower: the style is usually between 0.6 and 0.9 mm long.

  • The seeds are usually between 0.45 and 0.55 mm long.

This one to two year old herbaceous plant reaches heights of about 2 to 20 cm and is light green in color. The stem grows more or less upright and is covered with a few glandular hairs. It is never reddish at the bottom.

The leaves are oblong or ovate to lanceolate, the lowest with short stalk. All bracts and the sepals have a very narrow skin margin in front. They are bald on top.

It blooms from March to May. The petals are white and about 2.5 times as long as they are wide. There are usually six to ten stamens present.

Pale Hornwort ( Cerastium glutinosum )

The fruit stalks are more or less upright and are about as long as the calyx. But they can also be bent at the tip with a hook and then two to four times longer than the cup. The elongated, cylindrical capsule fruit pops up with ten teeth.

The number of chromosomes is 2n = 72.

Location claims and distribution

The pale hornwort grows in gappy dry grass , on paths and rainy areas. It prefers dry-warm, nutrient-rich and lime-rich, neutral-mild, loose stone, clay or loess soil. It loves warmth. In Central Europe it is a species of the Sedo-Scleranthetea class, but also occurs in gappy societies of the Festuco-Brometea class. Cerastium glutinosum is a sub-Mediterranean-subatlantic floral element, the exact distribution of which is still insufficiently known. It occurs in Europe and the Middle East.

In Austria only common in the Pannonian region , otherwise rarely, in Switzerland quite rarely. The pale hornwort occurs in the central part of Germany. Otherwise it is apparently very rare.

Systematics

The species was previously regarded as a subspecies of the dark hornwort ( Cerastium pumilum ) and as Cerastium pumilum subsp. pallens (FW Schultz) Schinz & Thell. designated. Further synonyms are: Cerastium semidecandrum subsp. glutinosum (Fr.) Čelak. , Cerastium glutinosum subsp. pallens (FW Schultz) Schinz & R. Keller , Cerastium pallens (FW Schultz) FW Schultz .

literature

Individual evidence

  1. ↑ a b c d Letz DR, Dančák M., Danihelka J. & Šarhanová P., 2012: Taxonomy and distribution of Cerastium pumilum and C. glutinosum in Central Europe. - Preslia 84: 33-69; cf. Corrections as well as taxonomic and floristic supplements and updates to the 3rd edition (2008) of the excursion flora for Austria, Liechtenstein and South Tyrol in Neilreichia 7 ( Memento of the original from April 21, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked . Please check the original and archive link according to the instructions and then remove this notice. , P. 238 @1@ 2Template: Webachiv / IABot / www.flora-austria.at
  2. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 377.
  3. ↑ Karol Marhold, 2011: Caryophyllaceae : Datasheet Cerastium pumilum In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity.

Web links

Commons : Pale Hornwort ( Cerastium glutinosum )  - Album with pictures, videos and audio files