Pastinaca vanensis Demir, Sefalı & Yapar, 2022

Demir, Ibrahim, Sefali, Abdurrahman & Yapar, Yakup, 2022, Pastinaca vanensis (Apiaceae), a new species from Turkey, Phytotaxa 554 (1), pp. 93-100 : 94-96

Pastinaca vanensis Demir, Sefalı & Yapar , sp. nov. ( Figs. 1 , 2 , 4A–B , 5 )

Pastinaca vanensis is related to P. zozimoides ( Fig. 3 ). It differs from P. zozimoides in that the stem is 25–42 cm long and glandular-villose (versus 10–25 cm long and eglandular-villose), the petals are white-dirty to white (versus pinkish), and the mericarp is oblongobovate, 4–5 × 3–4 mm, glandular-hairy (versus cordate-obovate, 3.5–4.5 × 3–4 mm, eglandular-hirsute).

Type: — TURKEY. Van: Başkale, Southern slopes of Ispiriz Mountain , stony places, 3400–3500 m a.s.l., 13.07.202 1, İ. Demir , A. Sefalı and Y. Yapar 10 (holotype: Bingöl University Herbarium ; isotypes: Bingöl University Herbarium, ANK) .

Description

Perennial with a cylindrical, erect, or horizontal rootstock; fibrous collar absent. Stem 25–42 cm long, much-branched from the base, glandular villose, striate, or slightly sulcate. Basal leaves 2–3 pinnate, 20–40 × 14–20 mm, oblong, ovate or triangular in outline, densely villose on both sides; petiole 5–12 cm long, sheathing the stem for 1–2 cm at the base; leaf segments 5–10 mm long, ovate or triangular; ultimate segment 3–5 × 1.5–2 mm; upper leaves reduced, 5–15 mm long. Umbels usually compound but some umbels in the middle part of the stem are simple; rays (1–)4–6, 1.5–10 cm long, subequal or unequal, hairy. Umbellules 5–12 flowered, bracts and bracteoles absent. Flowers pedicellate, pedicel 1–2.5 mm long, elongated to 4 mm in fruit, sepals not conspicuous. Corolla actinomorphic; petals 1.5–2.5 mm long, white-dirty to white, hairy on the dorsal surface. Mericarps oblong-obovate, 4–5 × 3–4 mm, rounded at base, margin entire, 0.4–0.6 mm glandular-hairy; stylopodium slightly conical with undulate margin; style glabrous; dorsal vittae 4, fusiform, sometimes reaching the middle of the mericarp; commissural surface glabrous or with a little wax; commissural vittae 2, fusiform, reaching the mericarp’s middle, to inverted V shape.

Phenology

Flowering in June–July, and fruiting in July.

Etymology

The epithet is derived from the name of Van province.

Vernacular name

Van keşiri ( Menemen et al. 2016b).

Conservation status

Pastinaca vanensis is a new species, known only from the type locality (Ispiriz mountain), with an area of occupancy of less than 10 km 2 and a number of mature individuals fewer than 250 (about 50). This species can also be found in near places. In this regard, more field observation is needed to determine the conservation status of the plant. Therefore, according to IUCN (2019), the new species should be regarded as DD (Data Deficient) category.

Ecology

Pastinaca vanensis grows in stony slopes of south exposures, at 3400–3500 m a.s.l., together with Acantholimon spirizianum Mobayen , Allium oreophilum C.A. Mey. , Androsace villosa L., Androsace caduca Ovcz. , Centaurea poluninii Wagenitz , Chondrilla spinosa Lamond & V.A. Matthews , Crepis dioritica Schott & Kotschy ex Boiss. , Didymophysa aucheri Boiss. , Euphrasia juzepczukii Denissova , Gypsophila graminifolia Barkoudak , Hedysarum cappadocicum Boiss. , Peltariopsis planisiliqua (Boiss.) Busch , Thlaspi kurdicum Hedge , Vavilovia formosa (Steven) Al. Fed. , Vicia ciceroidea Boiss. etc.

Figures

FIGURE 1. Pastinaca vanensis; A. general habit, B. flowers, C. mericarps. (photos by Yakup Yapar)

FIGURE 2. P. vanensis general habit (scanning)

FIGURE 3. Pastinaca zozimoides; A. general habit, B. flowers, C. mericarps. (photos by Ahmet Savran)

FIGURE 4. Pastinaca vanensis, A. flowers, B. mericarps (photos by Yakup Yapar); P. zozimoides, C. flowers, D. mericaps (photos by Ahmet Savran)

FIGURE 5. P. vanensis A- dorsal vittae, B- commisural vittae C- cross section of mericarp (a-hairs, b-dorsal vascular bundle, c-dorsal vittae, d-commisural vittae, e-mericarp wing margin) (scale 1 mm)