Taraxacum holmenianum Sahlin (Q3182)

taxon name

Taraxacum holmenianum

1 reference

taxon authority

Sahlin

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taxon rank

species

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taxon status

accepted

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common name

pissenlit de Holmen (French)

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Holmen's dandelion (English)

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Holmen’s dandelion (English)

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VasCan taxon numeric id

3610

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distribution

CA-NT

establishment of distribution

occurrence status

present

native

1 reference

publication

Porsild, A.E. & W.J. Cody. 1980. Vascular Plants of the Continental Northwest Territories, Canada. National Museum of Natural Sciences, Ottawa, Ont. 667 pp.

CA-NU

establishment of distribution

occurrence status

present

native

1 reference

establishment of distribution

publication

Aiken, S.G., M.J. Dallwitz, L.L. Consaul, C.L., McJannet, R.L., Boles, G.W. Argus, J.M. Gillett, P.J. Scott, R. Elven, M.C. LeBlanc, L.J. Gillespie, A.K. Brysting, H. Solstad & J.G. Harris. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. [CD-ROM] NRC Research Press, National Research Council of Canada, Ottawa.

Greenland, GL

occurrence status

present

native

1 reference

publication

FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. http://www.efloras.org/volume_page.aspx?volume_id=1019&flora_id=1

Greenland

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CA-NT

original value

N.W.T.

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CA-NU

original value

Nunavut.

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parent taxon

Taraxacum F. H. Wiggers

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taxon habit

herb

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GBIF taxon key

8857402

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Global Biodiversity Information Facility

IUCN Redlist Category

NE

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Global Biodiversity Information Facility

phenology

Flowering summer.

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taxon habitat

tundra hummocks

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polygons

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open slopes

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clay

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gravel

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elevation

0–300+ m

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special status

E

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taxon description fragment

Plants 5–15 (–20) cm;

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d0_s0

taproots branched.

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d0_s1

Stems 1–7+, ascending, purple, glabrous or glabrate.

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d0_s2

Leaves ca. 10+, horizontal to widely patent, rarely ± erect, (dark green);

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d0_s3

petioles winged mostly narrowly;

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d0_s4

blades oblanceolate to oblong-oblanceolate (runcinate), (1.5–) 2–6 (–9) × 0.3–1.3 cm, bases attenuate, margins lobed regularly, ± alternately, shallowly to deeply, lobes usually straight to slightly retrorse, sometimes slightly antrorse, deltate to triangular, acute to acuminate, apices acute to acuminate, faces glabrous.

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d0_s5

Calyculi of 10–14, appressed to slightly spreading, purplish, ovate to lanceovate bractlets in 2 series, 3–6 (–7.5) × 1.8–2.5 (–3) mm, not or narrowly scarious, hyaline purplish, apices long-acuminate to short-caudate, tips scarious, erose.

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d0_s6

Involucres dark olive green, sometimes purplish, tips purplish, campanulate, 11–15 (–20) mm.

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d0_s7

Phyllaries ca. 14 in 2 series, lanceolate to lanceovate, 1–3 mm wide, margins not scarious or narrowly to widely scarious in proximal 1/2, sometimes distally, apices sometimes callous, sometimes also some small-horned, tips scarious, erose.

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d0_s8

Florets 30–50 (–60);

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d0_s9

corollas dark yellow (outer with distinct, central greenish gray or pinkish stripe, tips dark), 15–20 × 1–3 mm.

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d0_s10

Cypselae yellowish or straw-colored, bodies obovoid to oblanceoloid, 3.5–4.2 mm wide, cones narrowly conic, 0.9–1.1 mm, beaks slender, 4.5–5 mm, ribs 12–16 (3–4 prominent), sharp, faces proximally tuberculate, muricate in distal 1/2;

1 reference

d0_s11

pappi white to yellowish, 5.5–6.5 mm. 2n = 16.

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d0_s12

morphology statement

whole organism

atypical some measurement

15

20

1 reference

d0_s0

whole organism

5

15

1 reference

d0_s0

whole organism

growth form

plant

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d0_s0

1

7

1 reference

d0_s2

ascending

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d0_s2

density

purple

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d0_s2

pubescence

glabrous

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d0_s2

pubescence

glabrate

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d0_s2

leaf

10

?

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d0_s3

leaf

horizontal

widely patent

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d0_s3

leaf

erect

rarely more or less

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d0_s3

leaf petiole

winged

mostly narrowly; narrowly

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d0_s4

oblanceolate

oblong-oblanceolate

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d0_s5

atypical length

1.5

2

1 reference

d0_s5

atypical length

6

9

1 reference

d0_s5

length

2

6

1 reference

d0_s5

0.3

1.3

1 reference

d0_s5

inflorescence phyllaries base

attenuate

1 reference

d0_s5

inflorescence palea margin

lobed

regularly

1 reference

d0_s5

course

straight

more or less alternately; alternately; shallowly to deeply; deeply; usually

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d0_s5

retrorse

slightly

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d0_s5

antrorse

sometimes slightly

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d0_s5

deltate

triangular acute

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d0_s5

deltate

triangular acute

1 reference

d0_s5

acute

acuminate

1 reference

d0_s5

leaf face

pubescence

glabrous

1 reference

d0_s5

inflorescence calyculus

appressed

slightly spreading

1 reference

d0_s6

inflorescence calyculus

purplish

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d0_s6

inflorescence calyculus

ovate

lanceovate

1 reference

d0_s6

atypical length

6

7.5

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d0_s6

length

3

6

1 reference

d0_s6

atypical width

2.5

3

1 reference

d0_s6

1.8

2.5

1 reference

d0_s6

scarious

narrowly; narrowly

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d0_s6

hyaline purplish

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d0_s6

long-acuminate

short-caudate

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d0_s6

scarious

1 reference

d0_s6

erose

1 reference

d0_s6

inflorescence involucre

dark olive

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d0_s7

inflorescence involucre

green

1 reference

d0_s7

inflorescence involucre

purplish

sometimes

1 reference

d0_s7

purplish

1 reference

d0_s7

campanulate

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d0_s7

atypical some measurement

15

20

1 reference

d0_s7

11

15

1 reference

d0_s7

inflorescence phyllary

14

1 reference

d0_s8

inflorescence phyllary

lanceolate

lanceovate

1 reference

d0_s8

inflorescence phyllary

1

3

1 reference

d0_s8

inflorescence palea margin

not scarious or

narrowly widely scarious

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d0_s8

callous

sometimes distally; distally; sometimes

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d0_s8

small-horned

sometimes

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d0_s8

scarious

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d0_s8

erose

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d0_s8

inflorescence flower corolla

dark yellow

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d0_s10

inflorescence flower corolla

length

15

20

1 reference

d0_s10

inflorescence flower corolla

1

3

1 reference

d0_s10

cone

conic

narrowly

1 reference

d0_s11

cone

0.9

1.1

1 reference

d0_s11

fruit beak

size

slender

1 reference

d0_s11

fruit beak

4.5

5

1 reference

d0_s11

leaf rib

12

16

1 reference

d0_s11

leaf rib

sharp

1 reference

d0_s11

leaf face

tuberculate

proximally

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d0_s11

leaf face

muricate

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d0_s11

fruit pappus

white

yellowish

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d0_s12

fruit pappus

5.5

6.5

1 reference

d0_s12

chromosome

16

1 reference

d0_s12

root taproot

branched

1 reference

d0_s1

inflorescence flower disc floret

atypical quantity

50

60

1 reference

d0_s9

inflorescence flower disc floret

30

50

1 reference

d0_s9

fruit cypsela

yellowish

1 reference

d0_s11

fruit cypsela

straw-colored

1 reference

d0_s11

general structure body

obovoid

oblanceoloid

1 reference

d0_s11

general structure body

3.5

4.2

1 reference