Taraxacum mirabile

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Taraxacum mirabile

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Common names

Turkish (Turkey): AkçırtlıkA

Description

"Plants dwarf, 2–4 (–5) cm tall. Petioles pale greenish to pale yellowish, glabrous, narrowly winged, conspicuously dilated at base, to 4–5 mm wide; plant base with a well developed arachnoid tunic, and with a conspicuous, very dense bright white arachnoid tomentum of hairs usually 4–5 mm long. Leaves conspicuously fleshy, light green to midgreen, glabrous, narrowly linear-oblanceolate to linear-spatulate, usually 2–2.8 (–4.2) × 0.2–0.3 (–0.6) cm, undivided, usually entire, with ± thickened margins, rarely with a few minute remote white cartilaginous teeth to 0.5 mm long, apex subobtuse, usually white cartilaginous, the cartilaginous part usually to 2 mm wide and ca. 0.5 mm long. Scapes brownish green, very densely arachnoid-tomentose throughout, subequalling to slightly overtopping leaves. Capitulum pure white, with few florets [usually (9) 12–16, rarely to 18], ca. 1.5 cm wide. Involucre light green to light yellowish green, pruinose to almost waxy pruinose, often suffused pale fulvous to pale pinkish, narrowly cylindrical, usually (2.0–) 2.5–3.5 mm wide. Outer phyllaries (7) 9–10 (12), appressed to ± loosely appressed, sometimes with a recurved tip or erect, conspicuously imbricate, the outermost ones usually triangular-ovate to ovate-lanceolate, (1.5–)2.0–3.0(–3.5) × 1.0–1.7 mm, the inner ones of them narrowly lanceolate, (2.5–) 3.5–4.2 (–4.8) × 0.7–1.1 mm, surface light green, greyish-green or light fulvous to light pinkish brown, sometimes with a dark thin middle line or a medium broad dark central part with a gradual transition into a paler, usually white or whitish border of variable width, usually from 0.1–0.2 to 0.3–0.4 mm wide, margin long ciliate at apex, surface glabrous or occasionally with a few short appressed arachnoid hairs near phyllary base, apex flat; inner phyllaries few (7–10), usually 7–9 (–10) mm long, usually 1.2–1.5 mm wide, of ± equal width, apex flat to ± callose. Outer ligules flat, white inside, striped pale pinkish outside, ligule teeth pale greyish. Stigmas yellow (sometimes pale greenish yellow when dry). Pollen present, pollen grains regular in size, usually 28–32 μm in diameter. Achenes light greyish or light greyish with a fulvous tinge, 3.1–3.5 × 0.8–0.9 mm, body very sparsely and minutely spinulose in the upper 1/4–1/5, short spinules confined to low ridges, remote, erectpatent to slightly curved upwards, less than 0.1 mm long, body covered with usually erect-patent, dense to subsparse, little hair-like protuberances usually 10–17 μm long, relatively thin, straight or curved or flexuous, the appearance of achene surface under the magnification of 100–170 is pubescent to tomentose, body ± gradually narrowing into a short, thick conical to subconical cone 0.2–0.25 × 0.3 mm, beak distinct, thickened, short, usually 0.9–1.0 (–1.3) × 0.3 mm, pappus white, 4–4.8 mm long."

from Kirschner & al. (2021: 53-54).B

Chromosome numbers

diploid, x = 8 (Kirschner & al. 2021).B

Distribution

Endemic to the vicinity of southern shores of Tuz Gölü and the neighbouring Tersakan Gölü, salt lakes in the central Anatolian Aksaray and Konya Provinces, where Taraxacum mirabile grows in saline vegetation.B
Asia-Temperate: Turkey nativeA,C

Bibliography

A. Güner A. (ed.), Türkiye Bitkileri Listesi (Damarlı Bitkiler). 2012
B. Kirschner J., Gürdal B., Štěpánek J. & al., Taraxacum mirabile, an enigmatic sexual halophilous endemic dandelion, represents a new section in Phytotaxa 489: 49-64. 2021
C. Davis P. H., Flora of Turkey and the East Aegean Islands 5. 1975