Alpine Sweet-Vetch

hedysarum alpinum

Alpine Sweet-Vetch (Hedysarum alpinum) is a resilient, perennial wildflower belonging to the legume family. Native to the subarctic and boreal regions of North America and Eurasia, this plant is celebrated for its beautiful sprays of pink-purple flowers and its vital role in high-latitude ecosystems. It is especially famous for its fleshy, edible taproots, which have historically sustained indigenous communities and wildlife alike through harsh northern winters. It thrives in gravelly river flats, alpine meadows, and open woodlands, bringing a burst of color to rugged northern landscapes.

生息地: Typically found on gravelly river flats, subalpine meadows, rocky slopes, and open boreal forests.

外見

This herbaceous perennial typically grows to a height of 20 to 70 centimeters. It features erect, clumped stems adorned with pinnately compound leaves, each composed of 9 to 21 oblong, lance-shaped leaflets. In mid-to-late summer, it produces dense, one-sided racemes of drooping, pea-like flowers that range in color from pale pink to deep magenta. Following pollination, the flowers develop into distinctive, jointed seedpods called loments, which are flat, segmented, and contain individual seeds within each section.

界Plantae門Tracheophyta綱Magnoliopsida目Fabales科Fabaceae属Hedysarum

Alpine Sweet-Vetch

カテゴリ

植物

レア度

Common

危険度

1/5 · 非常に低い

スナップ

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おもしろい事実

Historically, Indigenous peoples of Alaska and northern Canada harvested the sweet-tasting roots, eating them raw, boiled, or preserved in seal oil or lard.

It looks incredibly similar to the highly toxic 'Mackenzie's Sweet-Vetch' (Hedysarum mackenziei), making extremely careful identification crucial for wild foragers.

The plant became central to a modern survival mystery in Jon Krakauer's book 'Into the Wild', which hypothesized that adventurer Christopher McCandless died in Alaska after consuming toxic seeds of this plant, later proven to contain the toxic amino acid L-canavanine.

特殊能力

Houses symbiotic rhizobia bacteria in its root nodules to convert atmospheric nitrogen into usable nutrients, enriching poor subarctic soils.

Develops a thick, woody, and deeply penetrating taproot that helps it survive intense winds, soil erosion in gravel riverbeds, and severe winter freezes.

Produces segmented seedpods (loments) that easily break apart into individual units to be dispersed by wind, water, or passing animals.

サイズと詳細

長さ: 20-70 cm
体重: 0.05-0.3 kg
寿命: 5-20 年

食性と食事

As a photosynthetic plant, the Alpine Sweet-Vetch produces its own energy using sunlight, carbon dioxide, and water, supplemented by nitrogen fixed through a symbiotic relationship with soil bacteria.