Montag, 12. November 2012

Plant of the Day (November 12nd, 2012) - Hordeum jubatum L.

After a long time, I want to introduce a new grass. This grass is Hordeum jubatum L. from the Poaceae family. In German, this plant is known as “Mähnen-Gerste” and in English as “Foxtail Barley”.

H. jubatum - habitus

It a perennial grass, which can reach heights between 20 and 50 centimetres (7.9 to 19.7 inches). The stalk grows upright to slightly bended. The long and narrow leaves are hairy on both sides and have a bright green colour. They are also overhanging.

 H. jubatum - inflorescence (here you can see
the long awns)

The inflorescence are long, overhanging ears. Young ears have a silver colour, which become beige with age. Also characteristic is the red stitch of older ears, what could also be a reason for the name “foxtail barley” (because the ears look like a foxtail).

H. jubatum - habitus

The spikelets (“Ährchen”) of the ears are largely sterile; only one flower is fertile. This flower is also the only one with a stalk. As with the most species from the Genus Hordeum the lemma (“Deckspelze”) of H, jubatum has a long awn (“Granne”), which can reach a maximum length of nearly 8 centimetres.

Flowering time is during summer month. The ripe fruit is the typical one seeded nut of the Poaceae (“Karyopse”).

H. jubatum - inflorescence

In Europe, H. jubatum is an Neophyte. Its natural areal was North America (Canada) and East-Asia (Siberia) but as a popular garden plant, it was also imported to Europe and other parts of the World. From this gardens it started to grow wild later and can now be found at roadsides, construction sides or ruderal wastelands. It prefers loose soils and fresh to wet places.

H. jubatum tolerates much salt. Therefore, the species also benefits from the salt spreaders during winter, which caused a higher content of salt in the soil beside roadsides.

Keine Kommentare:

Kommentar veröffentlichen