Cochlearia groenlandica Linnaeus

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 : 190-191

Cochlearia groenlandica Linnaeus

Figure 5C

Materials examined. CANADA – Nunavut • Ellesmere Island, CFS Alert; 82°29′56″N, 062°19′19″W; 48 m a.s.l.; 8 Aug. 2019; habitat: xeric near the sewage outlet, with till and rocks as substrates, and sparse dominance of Puccinellia angustata (R. Brown) E. L. Rand & Redfield and Cochlearia groenlandica ; QFA 0635554 • same locality; 82°31′13″N, 062°25′46″W; 44 m a.s.l.; 27 Jul. 2019; habitat: mesic, with polygonal patterned ground made of till, dominated by Alopecurus magellanicus

Lamarck and Saxifraga oppositifolia ; QFA 0635555.

Identification. Plants 2.5–6.0 cm high; herbaceous; caespitose. Taproots present. Stems 1.0– 4.5 cm long; erect, ascending, or decumbent; glabrous. Leaves basal and cauline; heterophyllous; alternate; long-petiolate (basal leaves), short-petiolate (lower cauline leaves), and sessile (upper cauline leaves). Basal leaf petioles 8–13 mm long; not winged; glabrous. Basal leaf blades 4–6 mm long, 5–7 mm wide; ovate or deltate; bases truncate or subcordate; abaxial and adaxial surfaces both glabrous; margins glabrous; apices rounded or obtuse. Cauline leaf blades 3.6–9.0 mm long, 1.2–2.9 mm wide; oblanceolate; unlobed or lobed, with 1–2 triangular acute lobes on each side; bases cuneate. Inflorescence a raceme, with 5–12 flowers; elongating as the fruit matures. Pedi- cels glabrous. Sepals 4; 0.8–1.8 mm long, 0.4–0.8 mm wide; ovate or oblong; pale brown or purple, with hyaline margins; surface glabrous; margins glabrous; apices rounded or obtuse. Petals 4; 1.1–2.4 mm long, 0.2–1.0 mm wide; obovate; unlobed; white and sometimes pinkish tinged. Androecium with 6 stamens and 0.2–0.3 mm long anthers. Gynoecium with 1 style and 1 stigma. Fruit a silique; 3.7–5.9 mm long, 2.2–3.2 mm wide; spherical or ovoid; yellowish green or greyish purple; glabrous. Styles persisting in fruit 0.2–0.4 mm long, 0.1–0.2 mm wide. Stigmas 0.2–0.4 mm wide; larger than the styles.