Draba yukonensis A. E. Porsild (Q3538)

taxon name

Draba yukonensis

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taxon authority

A.E. Porsild

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taxon rank

species

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taxon status

accepted

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common name

drave du Yukon (French)

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Yukon draba (English)

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Yukon whitlowgrass (English)

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VasCan taxon numeric id

4035

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establishment of distribution

distribution

CA-YT

data format or standard

ISO3166-2

occurrence status

present

native

1 reference

publication

Cody, W.J. 2000. Flora of the Yukon Territory. 2nd ed. National Research Press, Ottawa. 669 pp.

CA-YT

data format or standard

ISO3166-2

original value

Yukon.

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parent taxon

Draba Linnaeus

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taxon habit

herb

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GBIF taxon key

3049736

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Global Biodiversity Information Facility

IUCN Redlist Category

NE

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Global Biodiversity Information Facility

phenology

Flowering late May–Jun.

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taxon habitat

stony ridges

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ancient beach

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grassy areas

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aspen stands

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elevation

ca. 600 m

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special status

F

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E

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C

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taxon description fragment

not scapose.

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d0_s3

Stems branched, 0.4–2 dm, pubescent throughout, trichomes simple, 0.3–1.2 mm, and 2–6-rayed, 0.05–0.6 mm.

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d0_s4

subsessile;

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d0_s6

blade oblanceolate to narrowly so, 0.3–1 cm × 0.5–2 mm, margins entire, (ciliate, trichomes simple, to 1.3 mm), surfaces pubescent, abaxially with (rigid), simple and 2-rayed trichomes, 0.4–1.2 mm, sometimes with short-stalked, 3–6-rayed ones, 0.1–0.3 mm, adaxially with simple trichomes.

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d0_s7

sessile;

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d0_s9

blade ovate to oblong, margins entire, surfaces pubescent as basal.

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d0_s10

Racemes 5–20-flowered, ebracteate, considerably elongated in fruit;

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d0_s11

Fruiting pedicels erect to ascending, straight, 0.5–3 mm, pubescent as stem.

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d0_s13

Flowers: sepals ovate, 1.2–1.6 mm, pubescent, (trichomes simple and 2–4-rayed);

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d0_s14

petals white, spatulate, 1.5–2 × 0.7–0.8 mm;

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d0_s15

anthers ovate, ca. 0.2 mm.

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d0_s16

Fruits ovoid to oblong, plane, not flattened, 2–5 × 1.5–2 mm;

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d0_s17

valves pubescent, trichomes short-stalked, 4-rayed or 5-rayed, 0.05–0.3 mm;

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d0_s18

ovules 36–52 per ovary;

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d0_s19

style 0.1–0.3 mm.

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d0_s20

Seeds oblong, 0.6–0.8 × 0.3–0.4 mm.

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d0_s21

morphology statement

stem caudex

simple

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d0_s3

stem caudex

branched

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d0_s3

stem caudex

scapose

not

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d0_s3

branched

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d0_s4

0.4

2

1 reference

d0_s4

pubescent

throughout

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d0_s4

arrangement

rosulate

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d0_s6

subsessile

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d0_s6

leaf blade

oblanceolate

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d0_s7

0.3

1

1 reference

d0_s7

0.5

2

1 reference

d0_s7

entire

1 reference

d0_s7

quantity

1

3

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d0_s9

sessile

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d0_s9

leaf blade

ovate

oblong

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d0_s10

entire

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d0_s10

leaf rachis

course

flexuous

not

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d0_s13

leaf rachis

pubescent

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d0_s13

orientation

erect

ascending

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d0_s13

course

straight

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d0_s13

0.5

3

1 reference

d0_s13

pubescent

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d0_s13

inflorescence flower sepal

ovate

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d0_s14

inflorescence flower sepal

1.2

1.6

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d0_s14

inflorescence flower sepal

pubescent

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d0_s14

coloration

white

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d0_s15

spatulate

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d0_s15

1.5

2

1 reference

d0_s15

0.7

0.8

1 reference

d0_s15

inflorescence flower anther

ovate

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d0_s16

inflorescence flower anther

0.2

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d0_s16

ovoid

oblong

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d0_s17

plane

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d0_s17

flattened

not

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d0_s17

2

5

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d0_s17

1.5

2

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d0_s17

inflorescence flower gynoecium pistil ovule

quantity

36

52

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d0_s19

inflorescence flower gynoecium pistil style

0.1

0.3

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d0_s20

seed

oblong

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d0_s21

seed

0.6

0.8

1 reference

d0_s21

seed

0.3

0.4

1 reference

d0_s21

simple

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d0_s4

0.3

1.2

1 reference

d0_s4

0.05

0.6

1 reference

d0_s4

simple

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d0_s7

inflorescence raceme

5-20-flowered

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d0_s11

inflorescence raceme

ebracteate

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d0_s11

inflorescence raceme

elongated

considerably

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d0_s11

general structure valve

pubescent

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d0_s18

short-stalked

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d0_s18

0.05

0.3

1 reference