Taraxacum sublacerum Haglund (1949: 112)

Kirschner, Jan, Štěpánek, Jan & Buryy, Vladimir V., 2025, Towards a revision of Taraxacum sect. Borealia (Compositae, Crepidinae) in Siberia and the continental Far East, with special reference to the dandelions of the Altai and Kamchatka, Phytotaxa 679 (1), pp. 1-147 : 103-104

42. Taraxacum sublacerum Haglund (1949: 112)

Type:— USA. Alaska, College, near Fairbanks, on railroad, 19 Jun 1948, Lepage 23215 ( LCU, n. v., not located in CAN, probably no longer extant, protologue photo!, holotype; isotype: S, n. v.) .

Etymology:—Similar to Taraxacum lacerum .

Plants medium-sized, usually 9–16 cm tall. Plant base ± without tunic (or with sparse remnants of old petioles), subglabrous to sparsely archnoid among petiole bases; Petiole narrow, unwinged, suffused purplish. Leaves ± light (greyish) green, usually sparsely arachnoid, outer leaves often subglabrous, not spotted nor blotched, suberect to erect-patent, narrow, linear or linear-oblanceolate in outline, usually 6–12 × 0.7–1.4 cm, usually pinnatisect, less often pinnatifid, outer leaves often sinuate-dentate or lobulate; terminal segment elongated, linear-triangular or linear-lingulate, up to 2.2 cm long, distal margin entire or with a pair of little teeth, basal lobules patent to recurved, linear-triangular, usually 1–3 mm long; lateral segments in 3–5 pairs, recurved to patent, linear, linear-lingulate or linear-triangular, distal margin entire or with a single tooth, or remotely denticulate in basal segments, proximal margin concave, ± entire; interlobes narrow, usually 1.5–3.0 mm wide, entire or with a single tooth or remotely denticulate; mid-vein greenish or suffused purplish. Scapes usually suffused bronze, arachnoid, usually overtopping leaves. Capitulum yellow, usually 1.5–2.0 cm wide. Involucre ± light olivaceous-green or green, (6–) 7 (–8) mm wide and narrowly rounded at base. Outer phyllaries usually 11–16, not imbricate, loosely appressed, leter erect, linear-lanceolate to narrowly lanceolate, usually 6–8 (–9) × (1.4–) 1.8–2.2 mm, surface light mid-green, border distinct, whitish, not very sharply delimited, ca. 0.2–0.3 (–0.4) mm wide, distally often suffused purplish, margin ± glabrous, apex with darker, thick horns usually 1–2 mm long; inner phyllaries 11–14 mm long, dark corniculate. Outer ligules narrow, flat to canaliculate, striped deep blackish purple outside, teeth dark purple, inner ligules usually subtubular, their teeth ± reddish. Stigmas dark discoloured, green. Pollen absent, anther tubes empty. Achenes (description modified from Haglund 1949: 112, 114, fig. 5b) light olivaceous-brownish, 4.2–4.7 × 0.8–0.9 mm, body relatively densely covered with short erect spinules in upper 1/3–1/2, otherwise often tuberculate or ± smooth, very gradually narrowing into a subconical cone 0.6–0.7 mm long; beak 7–8 mm long, pappus ± white. – Agamospermous. – Fig. 70 .

Specimens examined:— RUSSIA. Central Kamchatka, Bystrinskiy District, ostanovka u smotrovoi ploshchadki, skal’nye vystupy [a lookout point ca. 6.5 km SE of Anavgay, above banks of Bystraya River, 55°59.31496’N, 159°09.04247’E, ca. 240 m, rocky outcrops], 8 Jul 2017, O. A. Chernyagina & E. A. Devyatova ( KAM, no. det. 36901). – Bystrinskiy District , valley of Bystraya River , a canyon, 55°59.332’N, 159°09.045’E, 260 m, 30 Aug 2017, V. V. Buryy T090 (herb. V. V. Buryy, no. det. 36932) .

Outer phyllaries numerous, long, of a broad shape, with a distinct broad border usually wider than 0.5 mm

Figures

FIGURE 70. Taraxacum sublacerum. A, general habit; B, a detail of capitulum. Scale bars: A = 2 cm; B = 2 mm (both KAM, no. det. 36901).