Rhabdosciadium anatolyi Lyskov & Kljuykov, 2017

Lyskov, Dmitry, Kljuykov, Eugene, Güner, Ebru Doğan & Samigullin, Tahir, 2017, Molecular phylogeny of the genus Rhabdosciadium (Apiaceae) with description of a new species R. anatolyi from Hakkâri province, eastern Turkey, Phytotaxa 331 (2), pp. 253-262 : 258-259

Rhabdosciadium anatolyi Lyskov & Kljuykov , sp. nov. ( Fig. 2–4 )

The new species differs from other Rhabdosciadium species in breadth of lobes of basal leaves (12–22 mm vs. 1–10 mm), mainly ternate primary basal segments of leaves (vs. linear or deeply lobate), regularly serrated margin (vs. margin with distinct linear or lanceolate teeth).

Type:— TURKEY. Hakkâri province: 20 km E from Hakkâri. Wet rocky northern slope near the snowfield, alt.= 2620–2630 m, 37º 28′ N, 43º 49′ E, 3 July 2014, Lyskov & Krupitsky 14-TR-135 (holotype MW0595616; isotypes GAZI, W) .

Polycarpic, herbaceous plants with taproot 12 mm. Stems 45–60 cm tall and to 3–4 mm at base, single or numerous, solid, striate, under umbel slightly ribbed, glabrous, with dichotomous branches directed from middle part of stem, covered with fibrous collar; branches sporadic and alternate ( Fig. 2 ). Basal leaves forming rosette; petioles up to 15 cm long, with ampliate lanceolate-triangle sheaths at base, glabrous; leaf blades 15–30 cm long, 7–11 cm wide, ovate-lanceolate or lanceolate, pinnate or 2-pinnate with straddling primary segments, glabrous; leaf primary segments sessile or lower segments with petiolulates up to 2 cm long; lower segments usually trilobate with large elliptic central lobe up to 5 cm long and 2–3 cm wide; lateral lobes oblong, up to 3 cm long and 0.7–1 cm wide; upper segments elliptic or oblong-elliptic, 4–5 cm long and 1.5–2 cm wide. All segments with acute-serrate or rather shallow laciniate margin. Stem leaves significantly smaller than basal, with pinnate blades; the highest stem leaves prophyll-like, up to 5.5 cm long. Peduncle more than 1.5 cm long, with one prophyll. Number of rays 6–7; rays identical. Number of bracts 5–7, ovate-lanceolate, 5–7 mm × 0.5–3.0 mm, glabrous. Number of bracteoles 6–7, lanceolate, 1.2–2.5 mm × 1.0– 1.5 mm, acuminate ( Fig. 3 ). Pedicels 6–8, subequal, pedicel of fertile flower shorter or absent. Sepals reduced. Petals white with brownish lines, oblong-ovate, incurved, and glabrous.

Etymology: —The species is named in honor of the entomologist Anatoly Krupitsky, who together with the author collected the type material of the species and many other important specimens.

Distribution: —The species is known only from the locus classicus ( Fig. 4 ).

Phenology: —Flowering probably in the second half of July, and fruiting probably in August–September.

Figures

FIGURE 2 Rhabdosciadium anatolyi holotype (MW 0595616). Photo courtesy of National Depository Bank of Live Systems, Moscow State University.

FIGURE 3 Umbellule of Rhabdosciadium anatolyi with absent pedicel of central flower.

FIGURE 4 Distribution of Rhabdosciadium species: R. anatolyi (blue), R. aucheri (green), R. microcalycinum (purple), R. oligocarpum (red), R. petiolare (orange), R. straussii (yellow), R. urusakii (dark blue).