Yellow Mountain-Avens

dryas drummondii

The Yellow Mountain-Avens (Dryas drummondii) is a resilient, mat-forming woody dwarf shrub belonging to the rose family. Renowned for its ability to thrive in harsh, barren environments, this pioneering species is frequently one of the first plants to colonize newly exposed gravels left behind by retreating glaciers or shifting rivers. By forming symbiotic relationships with nitrogen-fixing bacteria, it plays a vital ecological role in enriching nutrient-poor soils, facilitating the gradual succession of richer plant communities. Its dense, creeping mats also help stabilize loose soils, preventing erosion along steep alpine slopes and dynamic river systems.

Lebensraum: Typically found on gravelly river flats, glacial moraines, scree slopes, and rocky alpine meadows.

Aussehen

This low-growing shrub is easily identified by its nodding, bell-shaped yellow flowers that bloom singly on upright, hairy stems. Unlike other mountain-avens, its petals remain somewhat closed, creating a cup-like appearance. Its leaves are oblong, dark green, and leathery with deeply scalloped edges, contrasting sharply with their woolly, silver-white undersides. As the flowers mature, they transform into spectacular, fluffy, feather-like seed heads that spiral elegantly to catch alpine winds.

ReichPlantaeStammTracheophytaKlasseMagnoliopsidaOrdnungRosalesFamilieRosaceaeGattungDryas

Yellow Mountain-Avens

Kategorie

Pflanzen

Seltenheit

Common

Gefahr

1/5 · Sehr gering

Snaps

Mach den ersten Snap!

Interessante Fakten

It acts as a primary ecological builder, transforming barren, rocky debris into nutrient-rich soil that allows other plant species to colonize the area.

Its twisted, feathery seed heads act like miniature weather vanes, twisting tightly when wet and expanding when dry to release seeds in dry, windy conditions.

Unlike most other mountain-avens which have wide-open white flowers, the yellow mountain-avens has nodding yellow blossoms that never fully open.

Besondere Fähigkeiten

Cooperates with Frankia bacteria in its root nodules to convert atmospheric nitrogen into a usable form, allowing it to survive on sterile gravel.

Produces feathery, plumose styles on its seeds that act as sails to maximize dispersal across barren post-glacial landscapes.

Establishes extensive, woody root networks and dense ground-hugging mats that bind loose gravel and prevent erosion.

Maße und Details

Länge: 5-25 cm
Lebenserwartung: 10-50 Jahre

Ernährung und Fütterung

As a photosynthetic plant, it generates its own energy using sunlight, carbon dioxide, and water, supplemented by nutrients fixed via root nodule symbiosis.

Hauptnahrung

Sunlight
Carbon dioxide
Water
Mineral nutrients

Nahrungssuche

Photosynthesis

Ökologische Zusammenhänge

mutualism

Frankia Bacteria

Frankia alni

Obtains crucial fixed nitrogen through a mutualistic relationship in its root nodules.

eaten by

Mountain Goat

Oreamnos americanus

Graze on the leaves and stems of the dwarf shrub in high alpine habitats during the summer months.

mutualism

Western Bumblebee

Bombus occidentalis

Visits the nodding yellow flowers for nectar and pollen, acting as a key pollinator.

Merkmale

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Sicherheit

Gefahr

1/5 · Sehr gering

Noch keine besonderen Sicherheitshinweise.

Häufig gestellte Fragen

Wie identifiziert man Yellow Mountain-Avens?

Der einfachste Weg, Yellow Mountain-Avens zu bestimmen, ist die Verwendung der Naturführer-App Snappit.

Was ist der/die/das länge von Yellow Mountain-Avens?

5-25 cm

Was ist der/die/das lebenserwartung von Yellow Mountain-Avens?

10-50 Jahre

Was frisst Yellow Mountain-Avens?

As a photosynthetic plant, it generates its own energy using sunlight, carbon dioxide, and water, supplemented by nutrients fixed via root nodule symbiosis.

Wo findet man Yellow Mountain-Avens normalerweise?

Typically found on gravelly river flats, glacial moraines, scree slopes, and rocky alpine meadows.

Wie jagt Yellow Mountain-Avens?

Photosynthesis