Taraxacum holmenianum Sahlin

Species

Angiosperms > Asterales > Asteraceae > Taraxacum

Characteristics

Plants 5–15(–20) cm; taproots branched. Stems 1–7+, ascending, purple, glabrous or glabrate. Leaves ca. 10+, horizontal to widely patent, rarely ± erect, (dark green); petioles winged mostly narrowly; 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. Calyculi of 10–14, appressed to slightly spreading, purplish, ovate to lance-ovate 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. Involucres dark olive green, sometimes purplish, tips purplish, campanulate, 11–15(–20) mm. Phyllaries ca. 14 in 2 series, lanceolate to lance-ovate, 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. Florets 30–50(–60); corollas dark yellow (outer with distinct, central greenish gray or pinkish stripe, tips dark), 15–20 × 1–3 mm. 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; pappi white to yellowish, 5.5–6.5 mm. 2n = 16.
Life form perennial
Growth form herb
Growth support -
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.05 - 0.15
Root system tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 3-8

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Taraxacum holmenianum world distribution map, present in Canada and Greenland

Identifiers

LSID urn:lsid:ipni.org:names:907607-1
WFO ID wfo-0000035309
COL ID 7NMJ6
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Taraxacum pumilum Taraxacum holmenianum Troximon pumilum