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

Arenaria L.

English: Sandwort.

Caryophyllaceae, Pink family.

Published in Sp. Pl. 423. 1753.

Synonymy. Eremogone Fenzl, Verbreit. Alsin. 13, tab. ad 18. 1833.

Arenaria L. subgen. Eremogone (Fenzl) Fenzl

Vegetative morphology. Plants 0.5–15 cm high; perennial herbs; caespitose, or not caespitose. Taproot present, or only fibrous roots present. Ground level or underground stems horizontal; rhizomatous; elongate, or compact; 0.3–3(–7) mm wide. Caudex present, or absent. Aerial stems erect, or decumbent. Leaves distributed along the stems, or mainly basal; opposite; marcescent. Petioles absent. Leaf blade bases cuneate, or attenuate. Blades 3–50 mm long, 0.5–2.5 mm wide, appressed to the stem or spreading, linear or oblong or lanceolate, flat or folded, appearing single-veined or with inconspicuous veins. Blade adaxial surface dull or shiny, glabrous. Blade abaxial surface glabrous. Blade margins glabrous or scabrous; apices acute.

Reproductive morphology. Flowering stems with leaves. Flowering stems hairy. Flowering stems puberulent. Flowering stem hairs simple; white or translucent. Flowers solitary, or in inflorescences. Inflorescences with flowers in a dichasium. Flowers per inflorescence 1–6; small, or medium-sized. Sepals conventional; 5; free; 1–2.5 mm long; 3–6 mm wide; green; herbaceous. Calyx glabrous. Petals conventional; free; same length as the calyx, or longer than the calyx; 5; white; obovate, or lanceolate; unlobed; 3.5–8 mm long. Stamens 10; stamen filaments glabrous. Anthers yellow; ellipsoid, or ovoid; 0.2–0.8 mm long. Ovary superior; carpels 3; syncarpous. Ovaries ovate, or oblong; glabrous. Styles present; 3; free; 0.8–2.5 mm long. Stigmas per ovary 1. Placentation free central. Ovules per ovary 10–35. Fruit with calyx persisting; dry; a capsule; elongate-cylindrical, or oblong; yellowish; 4–7 mm long; 2–3.5 mm wide; surface appearing veinless; dehiscent; opening with teeth at the top of the capsule; teeth 6. Seeds numerous; 0.6–1 mm long; brown; surfaces verrucose.

Chromosome information. 2n = 22, or 40 and 44 (in the Canadian Arctic Archipelago, to 80 in continental North American taxa).

General notes. Canadian authors, from Porsild (1957) to Scoggan (1978), have included Minuartia in a more widely circumscribed Arenaria. All or nearly all Eurasian authors (and Hultén for North America) have treated and treat Minuartia and Arenaria as separate genera.


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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