Taraxacum marginiferum

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Taraxacum marginiferum

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Description

"Plants small, usually 7–11 (–14) cm tall. Petiole light green, glabrous, narrow, unwinged, rarely the outermost petioles in outline, usually 4–8 × (0.3–) 0.5–1.0 cm, ± glabrous, from pinnatifid to usually pinnatisect, with 3–5 pairs of ± recurved to (less often) subpatent, usually linear-triangular (with flat-triangular asymmterical basal part and ± linear distal part), sometimes ± deltoid-triangular, entire lateral segments to ca 5 mm long, ± acute; interlobes distinct, entire, the narrowest width 1.5–3 mm; terminal segment ± elongated, entire, subacute, linear-triangular to linear-lingulate, usually 1.5–2.5 cm long, with basal lobules ± linear-triangular, short, ± recurved. Scapes brownish green, often suffused bronze, initially with scattered arachnoid hairs, later glabrous, ± overtopping leaves. Capitulum yellow, usually 1.5–2.5 cm wide. Involucre with contrasting colours (blackish and white), not pruinose, usually 6–8 mm wide and roundedsubtruncate at base. Outer phyllaries (9) 10–13 (14), ± imbricate, with contrasting colours of an almost black middle part and white borders, appressed, most of them broadly ovate to ovate, some lanceolate, most often (4–) 5–6 × 2.7–3.5 (–4.0) mm, rarely the innermost ones to 7–8 × 1.7–2.2 mm, with a distinct, sharply delimited, ± white border 0.5–1.2 mm wide, margin glabrous, sometimes denticulate, apex often reddish, ± flat in young capitula, corniculate in later ones; inner phyllaries often broad (frequently some pairs of inner phyllaries coalescing), usually 9–11 mm long, blackish green, usually ± flat to corniculate. Outer ligules ± flat to canaliculate, striped grey-purple beneath, inner ligule teeth purplish or dirty yellow. Stigmas greenish yellow or dirty yellow, sometimes slightly suffused purplish, distally greyish with a mixed grey and hyaline pubescence outside. Anthers polliniferous; pollen grains irregular in size. Achenes dark grey when ripe, but initially usually light greyish stramineous, 3.8–4.2 × 0.8–0.9 mm, body with medium dense acute to acuminate, slightly arcuate, erect to incised squamules and dorsiventrally flat spinules in upper 1/4, subabruptly narrowing into ± cylindrical cone 0.6–0.7 (–0.8) × 0.3 mm, beak ± thickened, 2.5–3 × 0.2–0.25 mm; pappus ± white, ca. 5.5–6.5 mm long. Agamosperm."

from Kirschner & al. (2020: 109-110)A

Distribution

Asia-Tropical: West Himalaya (Jammu-Kashmir nativeA)

Bibliography

A. Kirschner J., Štěpánek J., Klimeš L. & al., The Taraxacum flora of Ladakh, with notes on the adjacent regions of the West Himalaya in Phytotaxa 457: 1-409. 2020