Survey of the vascular plants of Alert (Ellesmere Island, Canada), a polar desert at the northern tip of the Americas Author Desjardins, Émilie Author Lai, Sandra Author Payette, Serge Author Dubé, Martin Author Sokoloff, Paul C. Author St-Louis, Annie Author Poulin, Marie-Pier Author Legros, Jade Author Sirois, Luc Author Vézina, François Author Tam, Andrew Author Berteaux, Dominique text Check List 2021 2021-02-09 17 1 181 225 http://dx.doi.org/10.15560/17.1.181 journal article 10.15560/17.1.181 1809-127X Oxyria digyna (Linnaeus) Hill Figure 13A–C Materials examined. CANADA – Nunavut • Ellesmere Island , CFS Alert ; 82°31′03″N , 062°26′20″W ; 58 m a.s.l. ; 2 Jul. 2019 ; habitat: barren ground near a river, with till and rocks as substrates; QFA0635579 . Identification. Plants 2.5–7.0 cm high; herbaceous; caespitose. Fibrous roots and rhizomes present. Stems 0.5–5.0 cm long; erect; glabrous. Leaves basal; alternate; petiolate. Petioles 8–16 mm long; glabrous; adnate, with ocrea. Basal leaf blade 5–18 mm long, 5–20 mm wide; reniform or orbicular; bases cordate; thick; green or reddish; abaxial and adaxial surfaces both glabrous; margins glabrous; apices rounded. Inflorescences a racemiform or paniculiform cyme, with ≥30 pedicel- late flowers; 16–40 mm long. Tepals 4; 1.8–2.3 mm long, 1–2 mm wide; sepaloid; obovate or oblanceolate; green, red, or pink. Androecium with 5–7 stamens and 1.0– 1.3 mm long anthers. Gynoecium with 2 styles and 1 stigma per style. Fruit an achene; 2.5–4.5 mm long, 2.5–3.5 mm wide; ovoid; winged; yellowish green to red; glabrous. Ranunculaceae – Buttercup family