Taraxacum pseudobithynicum

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Taraxacum pseudobithynicum

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Description

"Plants small, usually 6–10 cm tall. Root head with several paucifoliate rosettes, tunic absent, plant base with medium dense brownish hairs. Leaves variously erect-patent, usually 4–7 × 1–1.5 cm, deep green to darker green, sparsely arachnoid, mainly on mid-vein abaxially; leaf blade narrowly oblanceolate in outline, distinctly pinnatisect with bigger terminal lobe and relatively small lateral ones; terminal lobe helmet-shaped in outline, 1–1.8 × 0.7–1.2 cm, obtusely subacute to acute, with distal margins convex to subsigmoid, entire or with 1–2 acute teeth, often also with 1–2 ± deep incisions, basal lobules recurved, acute, proximal margins subconcave, entire; lateral lobes 2–5 pairs, deltoidtriangular to sickle-shaped, sometimes of a bird-wing shape, recurved with patent proximal part, acute, usually 3–7 × 3–5 mm, entire or with a single tooth, proximal margin straight or slightly concave, usually entire; interlobes long and narrow, usually 3–6 × 1–2 mm, with raised and brown-purple coloured margins, usually with (1)2 short acute teeth, rarely several unequal teeth; mid-vein pale or brownish-pinkish; petioles narrow to narrowly winged, broadly so at the very base, faintly greyish purplish. Scape subequalling leaves, relatively densely arachnoid (particularly below capitulum), purplish at base or later almost entirely purplish. Capitulum ca. 3 cm in diameter, flat, yellow; outer ligules flat, striped dark purplish grey-olivaceous outside, apical teeth black-purple, inner ligules canaliculate, with apical teeth deep yellow. Involucre rounded to subtruncate, ca. 4–5 mm wide at base; outer phyllaries 10–13, tightly appressed, some with erect tips, outer of them ovate, short, reaching 1/3–2/5 of the length of inner phyllaries, ca. 4 × 2.5–3 mm, the others longer, lanceolate, to 8 mm long, relatively dark, dark olivaceous green (to almost black-green when dry), the middle dark part with abrupt transition into distinct, paler to whitish border 0.2–0.3 mm wide, suffused pinkish in upper ½, flat and black-purple below apex, margins subglabrous to ciliate, inner phyllaries 10–12, light olivaceous, ca. 10 mm long, of equal width. Stigmas light greenish/greyish yellow, outside with pubescence of short black-tipped hairs. Pollen abundantly present, variable in size (14–32 μm). Achenes medium greyish straw-brown, relatively slender, 4.4–4.9 × 0.9–1.0 mm, with short spinules in upper ¼, otherwise almost smooth, subgradually narrowing into cylindrical to subcylindrical cone 0.7–1.0 mm long, often with a few spinules at base, beak (4–)5.5–7 mm long, thin, pappus 5–5.5 mm, pure white.—Agamosperm—Fl. July–August."

Gürdal & al. (2018: 207-208)A

Chromosome numbers

2n = 24, triploid, agamosperm.A

Distribution

The species is known only from the Uludağ (Bithynian Olympus), Bursa province, from elevations between 2100 and 2200 m.
Asia-Temperate: TurkeynativeA

Bibliography

A. Gürdal B., Štěpánek J., Zeisek V. & al., What is and what is not Taraxacum bithynicum (Compositae, Crepidinae) in Phytotaxa 373: 197-210. 2018