Taraxacum atropurpureum Kirschner, Stepanek, Buryy, Chernyagina & Efimov 2022, sp. nov.

• Main Authors: Kirschner, Jan, Štěpánek, Jan, Buryy, Vladimir V., Chernyagina, Olga A., Efimov, Petr G.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Plantae; Tracheophyta; Magnoliopsida; Asterales; Asteraceae; Taraxacum; Taraxacum atropurpureum; Kamchatskiy; Karaginskiy; Tymlat; Buryy; Syroy; Tolyatovayam; Kamchatka
• Online Access: https://zenodo.org/record/6646459; https://doi.org/10.5281/zenodo.6646459

Taraxacum atropurpureum Kirschner, Štěpánek, Buryy, Chernyagina & Efimov, sp. nov. Type:— RUSSIAN FEDERATION. The Far East: Poluostrov Kamchatka, vostochnoe poberezh’e, Kamchatskiy Kraj, Karaginskiy Raion, bassein reki Tymlat, srednee techenie r. Tolyatovayam, syroy lug v poyme (bezlesnoy) [N. Kamchatka, eastern coast, Karaginskiy District, Tymlat River basin, middle stream of Tolyatovayam River, a humid meadow in a treeless floodplain, 59°24’39.6” N, 162°33’17.1” E, 219 m], 10 Aug 2011, O. Chernyagina (KAM, no. det. 36880, holotype; isotype: PRA, no. det. 37010). Diagnosis:—Planta nostra spectabilis, differt a speciebus ceteris sectionis Arcticorum acheniis atropurpureis corpore sparse breviter spinuloso, in pyramidem brevissimam conicam 0.3–0.5 mm longam sensim transeunte, antheris polline carentibus, ligulis saturate luteis tubulosis vel raro subtubulosis, scapis glabris violascentibus, phyllariis involucralibus exterioribus paucis pruinosis et foliis pinnatisectis segmentis lateralibus patentibus. Plants small, slender, usually to 5 cm, later to 15 cm tall. Petiole thin, unwinged, usually purplish, glabrous, tunic absent. Leaves ± mid-green, glabrous, narrowly oblanceolate in outline, ca. 3.5–6 (–9.5) × 0.7–1.7 (–2.0) cm, pinnatipartite to pinnatisect, with 2–4 pairs of patent, narrowly deltoid, subacute lateral segments, distal margin ± straight to subconcave, entire, proximal margin ± straight, usually entire, sometimes with a single basal short triangular tooth; terminal segment broadly triangular to trilobed, lobes ± obtuse; interlobes distinct, 1–3 mm wide, entire; midvein usually ± suffused purplish. Scapes glabrous, brownish green, often suffused purplish, subequalling leaves. Capitulum mid-yellow to deep yellow, not fully opening, ca. 1 (–1.5) cm wide, florets not numerous (ca. 25–35). Involucre pruinose, greyish olivaceous-green, ca. 4–5 mm wide and narrowly rounded to subobconical at base. Outer phyllaries 7–10, posture variable, some ± appressed or loosely appressed, some erect, several or ...