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 Draba pauciflora R. Brown Materials examined. CANADA – Nunavut • Ellesmere Island , CFS Alert ; 82°29′58″N , 062°33′36″W ; 66 m a.s.l. ; 11 Aug. 2019 ; habitat: mesic, with polygonal patterned ground made of till, dominated by Stellaria longipes ; QFA0635550 , CAN . Identification. Plants 1.7–3.5 cm high; herbaceous; caespitose. Taproots present. Stems 0.4–3.0 cm long; erect or ascending; hairy, with simple and branched hairs (2–3 rays: T , V , Y , and ternate). Leaves basal; alternate or whorled; petiolate or subsessile. Petioles 2–5 mm long; winged; margins glabrous or ciliate, with simple hairs. Basal leaf blades 5.2–9.0 mm long, 1.8–3.4 mm wide; oblanceolate or obtrullate; bases attenuate; abaxial surface moderately hairy, with simple and branched hairs (2–5 rays: Y , T , ternate, and dendritic); adaxial surface sparsely to moderately hairy, with simple and branched hairs (2 rays: Y ); margins ciliate, with simple long hairs; apices acute. Inflorescence a raceme, with 2–5 flowers; elongating or not elongating as the fruit matures. Pedicels 1.5–4.0 mm long; hairy. Sepals 4; 2.3–2.5 mm long, 0.8–0.9 mm wide; ovate or oblong; yellow, with hyaline margins; surface hairy, with simple and branched hairs (2 rays: Y ); margins glabrous; apices obtuse. Petals 4; 2.9– 4.0 mm long, 1.2–1.8 mm wide; obovate or oblanceolate; unlobed, slightly lobed, or undulating; white or pale yellow. Androecium with 6 stamens and 0.2–0.4 mm long anthers. Gynoecium with 1 style and 1 stigma. Fruit a silique; 5.5–10.0 mm long, 1.8–4.0 mm wide; lanceolate or elliptic; flattened; green; hairy, with simple and branched hairs (2 rays: Y , T , and V ). Styles persisting in fruit 0.2– 0.4 mm long, 0.3–0.5 mm wide. Stigmas 0.4–0.7 mm wide; larger than the styles. Characteristics allowing to distinguish D. pauciflora from the other yellow-flowered Draba species present on Ellesmere Island can be found under D. corymbosa and D. micropetala .