. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian . CRUCIFERAE. 5. Draba nivalis Lilj. Yellow Arctic Whitlow-grass. Fig. 2001. Draba iihalis Lilj. Vet. Akad. Handl. 1793 : 208. 1793. Perennial by a short branched caudex; scapes tufted, somewhat pubescent, slender, leafless or sometimes bearing a small sessile leaf, 1-4' high. Basal leaves usually numerous, tufted, oblanceolate or spatulate. 2"-/' long, entire, acutish or
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian . CRUCIFERAE. 5. Draba nivalis Lilj. Yellow Arctic Whitlow-grass. Fig. 2001. Draba iihalis Lilj. Vet. Akad. Handl. 1793 : 208. 1793. Perennial by a short branched caudex; scapes tufted, somewhat pubescent, slender, leafless or sometimes bearing a small sessile leaf, 1-4' high. Basal leaves usually numerous, tufted, oblanceolate or spatulate. 2"-/' long, entire, acutish or acute at the apex, narrowed into a short petiole, stellate-canescent, not ciliate, or slightly so near the base; flowers yellow, about 2" broad; calyx pubescent; style short; pods oblong or linear-oblong, narrowed at both ends, glabrous or but little pubescent, on ascending pedicels i"-3" long. Labrador and Greenland, through arctic America to Alaska, south in the Rocky Mountains to Colorado, and in the Sierra Nevada to Nevada. Also in north- ern Europe and .^sia. Summer. 6. Draba incana L. Hoary or Twisted Whitlow-grass. Fig. 2002. Draba incana L. Sp. PI. 643, 1753. Draba confusa Ehrh. Beitr. 7: 155. 1792. Perennial or biennial; flowering stems erect, .sim- ple or somewhat branched, leafy, loosely pilose- pubescent, 16' high or less. Leaves 4"-i2" long, acutish or obtuse, dentate or nearly entire, the basal ones oblanceolate, those of the flowering stems lanceolate to ovate; flowers white, i"-ii'' broad; petals notched, twice as long as the calyx; pods oblong or lanceolate, acute, twisted when ripe, on short nearly erect pedicels, densely pubescent or gla- brous; style minute. In rocky places, Newfoundland and Labrador to Que- bec. Also in arctic and alpine Europe. Hunger-flower. Nailwort. Summer. Draba hirta L. of high boreal regions has fewer stem- leaves and longer fruiting pedicels.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
