Arabis kaynakiae Daşkın, 2013

Daşkin, Ruziye, 2013, Arabis kaynakiae (Brassicaceae), a new species from South Anatolia, Turkey, Phytotaxa 126 (1), pp. 43-48 : 43-45

Arabis kaynakiae Daşkın , sp. nov. ( Figure 1 )

Affinis A. androsacea Fenzl, A. alanyensi H. Duman et A. carduchorum Boiss. sed ab A. androsacea et A. alanyensi foliis rosulae pilis 2-4-furcatis et stellato-canescentis (non simplicibus sericeis vel simplicibus et 2-4-furcatis), caulis foliis pilis 2-4-furcatis et stellatis (non pilis simplicibus, nullis vel pectinato-ciliatis ad apicem), seminibus papillatis (non rugosis vel alveolatis) recedit. Ab A. carduchorum foliis rosulae obovatis, pilis 2-4-furcatis et stellatis (non linearibus pectinato-ciliatis), caulis foliis oblongo-lanceolatis (non lanceolatis), seminibus papillatis (non alveolatis) recedit.

Type: — TURKEY. C4 Mersin: Silifke-Gülnar , 17. km, 36º 22’ 26” N, 33º 46’ 21” E, 720 m, on calcareous rocks, 25 March 2011, fl. and fr ., G. Kaynak , R. Daşkın 1101 , Ö. Yılmaz & A. Yılmaz (holotype BULU!).

Perennial herb with a woody stock. Flowering stems erect, 4 − 8 cm, canescent with stellate hairs, 2 − 4 leaved and unbranched, but the whole stem branched and bears rosette leaves. Rosette leaves widely obovate, 7 − 15 × 2 − 9 mm, densely silver-canescent with 2 − 4-furcate and stellate hairs, few toothed to almost entire, attenuate to the 5-7 mm petiole. Flowering stem leaves oblong-lanceolate, 8 − 15 × 2 − 5 mm, exauriculate, sessile, tomentose with 2 − 4-furcate and stellate hairs. Inflorescence 1.5 − 3 cm, 7 − 10-flowered, without bracts. Pedicels 2 − 6 mm, ascending-erect. Sepals 3 − 4 × 0.75 − 1.0 mm, ovate-lanceolate, greenish white, margins membranous, sparsely to densely 2 − 4-furcate to stellate hairy. Petals white, 7 − 10 × 2.5 − 3.0 mm, oblong to spathulate, obtuse. Long filaments 6.8–7.0 mm, short filaments 3.5 − 4.0 mm. Anthers 1.5 mm, yellow. Fruiting pedicels spreading to reflexed, 10 − 12 mm. Siliquae 25 − 30 × 0.9 − 1.0 mm, flattened, glabrous, the valves without median nerve. Style 0.9 − 1.0 mm; stigma capitate. Seeds 1.0 × 0.75 − 1.0 mm, ovate to orbicular, pale brown to black, papillate, margins minutely tuberculate, 12 − 14 in each loculus, uniseriate.

Ecology and conservation status: — Arabis kaynakiae grows on limestone rocks at an elevation of 720- 750 m, together with the following plants: Anemone blanda Schott & Kotschy (1854: 129) , Alyssum umbellatum Desvaux (1814: 173 & 184), Cardamine graeca Linnaeus (1753: 655) , Arabis verna ( Linnaeus 1753: 664) W. T. Aiton (1812: 105) , Corydalis wendelboi Lidén (1989: 355) subsp. wendelboi , Anagyris foetida Linnaeus (1753: 374) , Lamium amplexicaule Linnaeus (1753: 579) , Quercus coccifera Linnaeus (1753: 995) Phillyrea latifolia Linnaeus (1753: 8) , Galium canum Requien ex DC. (1830: 602) subsp. canum , and Ornithogalum wiedemannii Boissier (1882: 221) .

The new species is an endemic and only known from two close populations from Gülnar district (Mersin province), south Anatolia (Figure 2). The extent of occurrence and area of occupancy of the species are less than 100 km 2 and 10 km 2, respectively. Furthermore, its habitats and populations are damaged during opening of the new road. Therefore, the species should be classified as Critically Endangered, CR (criteria B1, B2a, b (iii) according to the World Conservation Union categories ( IUCN 2011).

Etymology: —The specific epithet is in honour of Prof. Dr. Gönül Kaynak (Biology Dept, Uludag Univ.), adviser of the author’s PhD thesis.

Figures

FIGURE 1. Arabis kaynakiae. A. Habit, B. Rosette leaf, C. Stem leaf, D. Sepal, E. Petal, F. Fruit, G. Seed, H. Type of hairs, lateral view, I. above view, A–E from R. Daşkın 1101 (BULU); F–I from R. Daşkın 1202 (BULU). Drawn by D. Özten.