Hesperis burdurensis Ö.Çetin, 2022

Çetin, Özlem, 2022, Hesperis burdurensis (Brassicaceae), a new species from Southwest Anatolia, Phytotaxa 560 (2), pp. 209-221 : 210-212

Hesperis burdurensis Ö.Çetin sp. nov. ( Figure 1–4 )

Type: Turkey, C2 Burdur: Dirmil, Maşta village, 5. Km , under forest, 10.06.2020, Ö. Çetin 2750 (holo GAZI; isotype ANK) .

Perennial. Trichomes simple, 2–4–rayed, 0.5-3 mm long. Glands unicellular on a few-celled uniseriate stalk, 0.1-0.25 mm long. Stem erect, 20–60 (–70) cm tall (including flowering part), solitary or tufted (2–5 stems), terete, ±smooth or slightly sulcate; trichomes densely long simple and some bifurcate, 1.5–3 mm long, glands densely distributed along stem, 0.15-0.25 mm long. Leaves crowded at base; basal leaves obovate, lyrate, sinuate or remotely dentate, obtuse, 4–8 × 0.4–2 cm (including 1.5–4 cm petiole), glabrescent, with minutely 2–4–rayed and simple trichomes; lower cauline leaves lyrate, oblong-elliptic, remotely dentate, obtuse to acute, petiolate, trichomes densely bifurcate, a few simple, and 3–rayed, 0.5-1 mm long; glands present, c. 0.2 mm long; middle cauline leaves elliptic-oblong, lanceolate, ±acute, ±sessile, attenuated at the base, remotely dentate or toothed at base, trichomes 2–3–rayed; glands c. 0.2 mm long, upper cauline leaves lanceolate, sessile or rarely semiamplexicaule, slightly contracted at the base, entire or irregularly 1–3 tooted at base, acute. Inflorescence raceme. All flowers ebracteate. Pedicels ascending to erect, slender, 5–20 mm long at anthesis, trichomes simple and rarely bifurcate; glands densely distributed along pedicels and sepals, 0.1–0.25 mm long on pedicels. Sepals partly or entirely pinkish, oblong, deciduous, 5–10 × 1.5–2.2 mm, with membranous margins, inner sepals saccate, trichomes long simple and rarely bifurcate, 1–1.5 mm long, glands 0.1–0.25 mm long. Petals narrowly obovate to oblong, 18–22 × (2–) 3–4 mm, purplish to violet, obtuse or rounded. Outer filaments 3–4 mm long, dilated at base, inner filament 5–6 mm long, glabrous. Anthers all fertile, ±linear, 2.3–2.8 mm long, yellowish or greenish. Stigma with 2 obtuse, decurrent carpidial lobes. Ovary glabrous. Fruiting pedicels not thickened towards the fruit, graceful, 1–2.7 cm. long, 0.5-1 mm in diameter. Siliquae 5–10 × 0.1–0.15 (0.2) cm, terete, dehiscent, slightly torulose, straight, ascending to erect, glabrous, greenish. Seeds brown, 2–3 × 1–1.3 mm.

Phenology: Hesperis burdurensis has been found flowering in May and June, and fruiting in June and July.

Distribution, habitat, and biogeography: Hesperis burdurensis was firstly collected from slopes between Maşta village and Karanlıkdere Canyon in South Anatolia and can be considered as an East Mediterranean element. It grows under Juniperus excelsa M. Bieberstein (1808: 425) forest with Asyneuma michauxioides ( Boissier 1844:35) Damboldt (1976:49) , Digitalis cariensis Boissier ex Bentham (1846: 450) , Ebenus reesei Huber-Morath (1940:286) , Rhus coriaria Linnaeus (1753: 265) , Salvia tomentosa Miller (1768) , Scutellaria brevibracteata Stapf (1885: 99) , Silene cryptoneura Stapf (1886: 8) , Teucrium chamaedrys Linnaeus (1753: 565) , and Turritis laxa Hayek (1925: 402) at the altitude of 1350 m. The distribution is mapped in Fig 3 .

Conservation status: H. burdurensis is known in Maşta village, and the area of occupancy and the extent of occurrence is less than 10 km 2 (Criterion B2). Mature individual members of the population number less than 100. Therefore the category should be considered as Critically Endangered; CR B2 ab(iii,v) according to the IUCN Red List Criteria (IUCN 2020).

Figures

FIGURE 1. Holotype of Hesperis burdurensis

FIGURE 2. Hesperis burdurensis sp. nov. a—habit, b—flowers, c—calyx, d—fruit, e—pedicel, f—stem leaves, e—basal leaves.

FIGURE 3. Distribution map of H. burdurensis (), H. bicuspidata (), H. ozcelikii (), H. pisidica (), H. tosyaensis ().

FIGURE 4. SEM micrographs of pollen a–c, H. burdurensis, d–f, H. ozcelikii, g–i, H. tosyaensis, j–l, H. pisidica.