Flora of the Canadian Arctic Archipelago

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S.G. Aiken, M.J. Dallwitz, L.L. Consaul, C.L. McJannet, R.L. Boles, G.W. Argus, J.M. Gillett, P.J. Scott, R. Elven, M.C. LeBlanc, L.J. Gillespie, A.K. Brysting, H. Solstad, and J.G. Harris

Hedysarum L.

English: Liquorice-root, Eskimo potato.

Fabaceae (Leguminosae), Pea family.

Published in Sp. Pl. 745. 1753

Vegetative morphology. Plants 10–40 cm high; perennial herbs; not caespitose. Taproot present. Ground level or underground stems vertical. Caudex present. Aerial stems erect, or ascending. Leaves distributed along the stems; alternate, or opposite; dying annually and non-persistent. Stipules present; persisting for 2 or more years; sheathing; brown; hairy. Petioles 5–25 mm long; glabrous, or hairy. Leaf blades compound. Blades 20–100 mm long, 10–60 mm wide, spreading, veins pinnate. Blade adaxial surface dull or fresh green, glabrous or hairy. Blade abaxial surface glabrous or hairy, hairs pubescent or strigose, hairs sparse or very dense, hairs white, hairs straight or curved, hairs appressed. Blade apices acute, or rounded. Leaflet arrangement pinnate (leaflets alternate). Leaflets 5–13; 5–40 mm long; 4–9 mm wide; oblong, or ovate, or lanceolate; veins inconspicuous.

Reproductive morphology. Flowering stems about as high as the leaves, or conspicuously taller than the leaves; without leaves. Flowering stems hairy. Flowering stems strigose (sparse). Flowering stem hairs simple; white or translucent. Inflorescences racemose; 2–8 cm long. Pedicels present, or absent (very short). Bisexual spike(s) with empty bracts at the base (stipule-like). Flowers per inflorescence 5–15; medium-sized, or large; bilaterally symmetrical (zygomorphic). Sepals conventional; 5; fused; 3–6.5 mm wide; green, or brown. Calyx tubular; 5-lobed; hairy. Calyx hairs white or translucent. Calyx teeth equal or nearly so, or sub-equal or unequal; 1–2.5 mm long. Petals conventional; both free and fused; 5; pink, or purple; with contrasting markings (without an appendage on the keel); unlobed, or slightly lobed or undulating; 10–25 mm long. Corolla papilionaceous; keel blunt. Wing auricles free from each other, blunt, shorter than the claw, or united, linear, nearly equal to the claw. Stamens 10; stamen filaments all equal in length (or slightly unequal). Anther filaments 9 fused into a tube, plus 1 free. Anthers yellow; 0.5–0.6 mm long. Nectaries present. Ovary superior; carpels 1; monomerous. Stigmas per ovary 1. Ovules per ovary 2–6. Fruit stalked; with calyx persisting; dry; a loment; elongate-cylindrical; yellowish, or brown; 20–40 mm long; 4–8 mm wide; glabrous, or hairy; distinctly flattened; indehiscent (but splitting between the articles of the loment). Loment margins wingless, or winged with auricles. Seeds 1–6; 1.5–3 mm long; brown; surfaces smooth.

Chromosome information. 2n = 14, or 28.

North American distribution. Arctic islands: Parry islands, Banks, Victoria.

General notes. Elven (personal communication, 2005) accepts as arctic the following taxa: Hedysarum boreale subsp. dasycarpum (Asian) and subsp. mackenzii (amphi-Beringian) whereas subsp. boreale is non-arctic American; H. americanum (American and amphi-Beringian) and H. vicioides (Siberian) whereas H. alpinum is non-arctic Siberian; and H. hedysaroides subsp. arcticum (Asian) and subsp. tschuktschorum (amphi-Beringian) whereas subsp. hedysaroides is non-arctic European and W Siberian.


This publication is available on the internet (posted May 2011) and on CD-ROM (published in 2007). These versions are identical in content, except that the errata page for CD-ROM is accessible on the main index page of the web version.

Recommended citation for the web-based version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. NRC Research Press, National Research Council of Canada, Ottawa. http://nature.ca/aaflora/data, accessed on DATE.

Recommended citation for the CD-ROM version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. [CD-ROM] NRC Research Press, National Research Council of Canada, Ottawa.

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