Austrian Whitlow-Grass

draba dubia

The Austrian Whitlow-Grass (Draba dubia) is a resilient, low-growing alpine perennial that thrives where few other plants dare to venture. Clinging to rocky crevices, scree slopes, and windswept mountain ridges across Europe's high-altitude ranges, this diminutive member of the mustard family showcases the incredible endurance of alpine flora. Despite the harsh climates, it bursts into delicate blooms during the brief alpine summer, providing crucial resources for high-altitude pollinators. Adapted to freezing temperatures, intense UV radiation, and nutrient-poor soils, Austrian Whitlow-Grass forms compact, ground-hugging cushions or rosettes. This growth form protects it from biting mountain winds and helps trap heat close to the ground, demonstrating how miniature scale can be an evolutionary superpower in extreme environments.

Lebensraum: Found primarily in rocky subalpine and alpine zones, colonizing limestone crevices, gravelly scree, and windswept mountain ridges.

Aussehen

This petite perennial typically reaches heights of only 5 to 15 centimeters, forming a neat basal rosette of grayish-green, spoon-shaped leaves. These leaves are covered in a dense coat of fine, star-shaped (stellate) hairs, giving the foliage a slightly frosty or woolly appearance that helps retain moisture. During late spring and summer, slender, leafless stems arise from the rosette, topped by small clusters of four-petaled white flowers. Following pollination, the plant develops distinctive, flattened, lance-shaped seed pods called siliques, which twist slightly as they mature.

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Austrian Whitlow-Grass

Kategorie

Pflanzen

Seltenheit

Common

Gefahr

1/5 · Sehr gering

Snaps

Mach den ersten Snap!

Interessante Fakten

Despite its fragile appearance, this plant can survive temperatures far below freezing even during its active flowering phase.

Its seeds are adapted to be dispersed by mountain winds, but also by water washing down steep alpine slopes.

The common name Whitlow-Grass comes from a traditional herbal belief that species in the Draba genus could cure whitlows, which are painful infections of the fingernail.

Besondere Fähigkeiten

Dense, star-shaped hairs on its leaves trap a boundary layer of air to reduce water loss from wind and reflect harsh high-altitude UV radiation.

Accumulates soluble sugars and protective proteins in its cells to prevent ice crystal damage during sudden mountain frosts.

Features a strong, penetrating taproot system capable of anchoring securely in tiny rock crevices to extract scarce moisture and nutrients.

Maße und Details

Länge: 5-15 cm
Lebenserwartung: 3-10 Jahre

Ernährung und Fütterung

As a photoautotroph, the Austrian Whitlow-Grass produces its own energy through photosynthesis, utilizing sunlight, carbon dioxide, and soil minerals.

Hauptnahrung

Sunlight
Carbon Dioxide
Water
Soil Minerals

Nahrungssuche

Photosynthesis

Ökologische Zusammenhänge

mutualism

Alpine Bumblebee

Bombus alpinus

Pollinated by alpine insects seeking nectar in the early summer.

eaten by

Chamois

Rupicapra rupicapra

Foraged upon by high-altitude grazing herbivores.

host plant

Peak White Butterfly

Pontia callidice

Larvae feed on the leaves of various alpine brassicas.

Merkmale

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Sicherheit

Gefahr

1/5 · Sehr gering

Noch keine besonderen Sicherheitshinweise.

Häufig gestellte Fragen

Wie identifiziert man Austrian Whitlow-Grass?

Der einfachste Weg, Austrian Whitlow-Grass zu bestimmen, ist die Verwendung der Naturführer-App Snappit.

Was ist der/die/das länge von Austrian Whitlow-Grass?

5-15 cm

Was ist der/die/das lebenserwartung von Austrian Whitlow-Grass?

3-10 Jahre

Was frisst Austrian Whitlow-Grass?

As a photoautotroph, the Austrian Whitlow-Grass produces its own energy through photosynthesis, utilizing sunlight, carbon dioxide, and soil minerals.

Wo findet man Austrian Whitlow-Grass normalerweise?

Found primarily in rocky subalpine and alpine zones, colonizing limestone crevices, gravelly scree, and windswept mountain ridges.

Wie jagt Austrian Whitlow-Grass?

Photosynthesis