Bistorta vivipara (Linnaeus) Delarbre, 1800

Desjardins, Émilie, Lai, Sandra, Payette, Serge, Dubé, Martin, Sokoloff, Paul C., St-Louis, Annie, Poulin, Marie-Pier, Legros, Jade, Sirois, Luc, Vézina, François, Tam, Andrew & Berteaux, Dominique, 2021, Survey of the vascular plants of Alert (Ellesmere Island, Canada), a polar desert at the northern tip of the Americas, Check List 17 (1), pp. 181-225 : 211

Bistorta vivipara (Linnaeus) Delarbre

Materials examined. CANADA – Nunavut • Ellesmere Island, CFS Alert ; 82°28′14″N, 062°24′04″W; 112 m

a.s.l.; 9 Aug. 2019; habitat: wetland, with peat and till as substrates, dominated by Eriophorum triste , Alopecurus magellanicus , moss, and blue-green algae (macroscopic sheet colonies dominated by Nostoc sp. ); QFA 0635578.

Identification. Plants 4.0– 7.5 cm high; herbaceous; not caespitose. Fibrous roots and rhizomes present. Stems 2.5–5.0 cm long; erect; glabrous. Leaves basal and cauline; heterophyllous; alternate; petiolate. Petioles 1–20 mm long; glabrous; adnate, with ocrea. Basal leaf blades 11–34 mm long, 3–6 mm wide; lanceolate or elliptic; bases attenuate or cuneate; abaxial surface hairy, with hyaline non-glandular hairs; adaxial surface shiny and glabrous; margins slightly revolute and glabrous; apices acute. Cauline leaf blades 5–18 mm long, 1–3 mm wide. Inflorescences a spike, with sessile bulbils throughout or with sessile bulbils proximally and 1–4 pedicellate flow- ers apically; 14–28 mm long. Bulbils 1.5–2.7 mm long, 1.0– 1.7 mm wide; pyriform; reddish-purple or dark purple; surface glabrous. Tepals 5; 1.5–2.1 mm long, 0.7–1.4 mm wide; petaloid; obovate; white or pink. Androecium with 5–8 stamens and 0.2–0.3 mm long anthers. Gynoecium with 3 styles and 1 stigma per style. Fruit not observed at Alert.