Rosa vanheurckiana Crép. var. barbata Kit Tan, Yıldırım & Zieliński, 2012

Tan, Kit, Yildirim, Hasan & Zieliński, Jerzy, 2012, Establishment of Rosa sect. Caninae subsect. Orientales (Rosaceae) and the recognition of an unusual variety of Rosa vanheurckiana from eastern Anatolia, Turkey, Phytotaxa 54 (1), pp. 26-36 : 28-33

publication ID	https://doi.org/ 10.11646/phytotaxa.54.1.3
persistent identifier	https://treatment.plazi.org/id/E77A3F57-FFD0-FFA8-F4AB-F94DFCC3D512
treatment provided by	Felipe
scientific name	Rosa vanheurckiana Crép. var. barbata Kit Tan, Yıldırım & Zieliński
status	var. nov.

Treatment

Rosa vanheurckiana Crép. var. barbata Kit Tan, Yıldırım & Zieliński View in CoL , var. nov. — Figs. 1–9 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9

Hypanthii setis dense pilosis a typo differt.

Type:— TURKEY. Province B6 Malatya: Darende, Ağılbaşı (Engüzek) Belediyesi , Ağılbaşı plateau, Beşdelik area , calcareous rock crevices, 38°34’N, 37°46’E, 1660 m, 27 June 2011, Yıldırım 2173 (holotype EGE!, isotypes C! KOR! LD!) GoogleMaps .

Low-growing, much-branched shrub 15–30 cm tall (reaching 1 m in damp and shaded areas), with twisted and gnarled prostrate stems. Prickles dense on young branches, uniform, straight to slightly curved, 4–9 mm long, slender, subulate, dilated at base, remaining pubescent, sometimes glabrescent. Leaves with 7 elliptic to ovate, 1.5 4.5 × 1.0 2.5 cm leaflets; leaflets pale greyish-green, uniserrate to slightly biserrate, acute, obtuse or retuse, cuneate at base, densely velutinous, eglandular except at tip of teeth. Rhachis densely velutinous, with few stalked glands; stipules 10 20 × 2 3 mm, pubescent, glandular-serrulate, with divergent auricles. Flowers mostly solitary, rarely 2 4 in cluster. Pedicels 1.0 1.7 cm long, densely pubescent and often with several plumose, gland-tipped setae. Sepals narrowly ovate to lanceolate with long narrow apex dilated above, 1.5 3.0 cm long, the outermost usually with 1–2 small but distinct lateral lobes (rarely all entire), with densely plumose, gland-tipped setae on outside, erect to patent after anthesis, persistent in fruit. Petals white faintly tinged pink, veined salmon-pink in bud, 1.5 2.0 × 1.5–2.0 cm, emarginate, deciduous after anthesis. Styles lanate to villous; stigma capitate, semi-globose, almost as broad as the narrow, ± concave disc. Orifice broad. Hypanthia scarlet-crimson, obovoid, 2.0 4.5 × 1.5 2.5 cm, covered with densely plumose, gland-tipped setae 2 5 mm long. Flowering June to July; fruiting August to September.

Pollen morphology:— The pollen grains of Rosa vanheurckiana var. barbata are similar to the grains of other roses of sect. Caninae (Wroṅska-Pilarek 2011, Wroṅska-Pilarek & Jagodziṅski 2001). They are 3- zonocolporate, isopolar, narrowly elliptical and medium-sized with the length of polar axis c. 40 µm and the equatorial diameter c. 18 µm. The exine is striate; the straight or wavy striae are distinctly narrower than the grooves and arranged ± parallel to the polar axis ( Fig. 6B View FIGURE 6 ). The grooves are rather deep, with perforations of various diameters at the bottom.

Habitat and ecology:— Mainly in full sun on rocky limestone slopes and in rock crevices at elevations from 1630–1660 m ( Fig. 7 View FIGURE 7 ). Here the plants are very dwarfed, up to 30 cm tall at most, and with smaller fruits and leaves. They were also found in damp and shaded places near cliff overhangs where they attain a height of up to 100 cm. At least 46 large and mature individuals were counted in the area covering nearly 7 square kilometers. Seed germination appears to be successful and many seedlings were well-established near their parents so we think the total size of the population to be more than a hundred.

Several pollinators including the honey bee ( Apis mellifera ) were observed visiting the flowers during June and July. Although there were apricot orchards not far away there was no evidence of anthropogenic factors affecting Rosa vanheurckiana var. barbata . Sixteen plants of R. canina L. were counted in the same area and six hybrids between that species and R. vanheurckiana var. barbata were noted. These hybrids exhibit two morphological forms: 5 plants were 30–50 cm in height and had completely smooth fruits ( Fig. 3C View FIGURE 3 ); one plant was ca. 175 cm tall and produced fruits with glabrous gland-tipped setae without plumose hairs. On rare occasions some setae were weakly plumose-hairy ( Fig. 3B View FIGURE 3 ).

Besides Rosa canina , other taxa in the immediate area include Acantholimon armenum Boiss. & Huet. var. armenum , Aegilops biuncialis Vis. , Allium ampeloprasum L., Anchusa leptophylla Roemer & Schultes subsp. tomentosa (Boiss) Chamb. *, Anthemis cretica L. subsp. anatolica (Boiss.) Grierson , Arabis montbretiana Boiss. , Arenaria acerosa Boiss. *, Asplenium haussknechtii God. & Reut. , Astragalus kurdicus Boiss. var. muschianus (Kotschy & Boiss.) Chamberlain *, Bromus tectorum L. subsp. tectorum , Campanula propinqua Fisch. & Mey. , Campanula scoparia (Boiss. & Hausskn.) Damboldt *, Chaenorhinum semispeluncarum H.Yıldırım et. al. *, Chaerophyllum macrospermum (Sprengel) Fisch. & Mey. , Cirsium arvense (L.) Scop. subsp. arvense , Consolida orientalis (Gay) Schrod. , Elymus lazicus (Boiss.) M e l d e r i s s u b s p. d i v a r i c a t u s (B o i s s. & B a l.) M e l d e r i s*, E u p h o r b i a r i g i d a B i e b., E p i l o b i u m anatolicum Hausskn. subsp. anatolicum , Glaucium corniculatum (L.) Rud. subsp. refractum (Nab.) Cullen, G y p s o ph i l a pi n i f o l i a B o i s s. & H a us s k n.*, H e l i a nt h e m u m c a n u m (L.) B a u m g., H e l i c h r y s u m armenium DC. subsp. araxinum (Kirp.) Takht. , Hypericum thymbrifolium Boiss. & Noe , Inula aschersoniana Janka , Marrubium globosum Montbret & Aucher ex Bentham subsp. globosum *, Malcolmia africana (L.) R.Br., Micromeria cristata (Hampe) Briseb. subsp. orientalis P.H.Davis *, Minuartia juniperina (L.) Maire & Petitm., Morina persica L. var. persica , Onosma molle DC. , Origanum vulgare L. subsp. gracile (C.Koch) Ietswaart , Parietaria judaica L., Parietaria lusitanica L., Paronychia kurdica Boiss. subsp. kurdica Boiss. var. kurdica (Boiss.) McNeill , Phleum bertolonii DC. , Phryna o r t e g i o i d e s (F i s c h. & M e y.) P a x & H o ff m.*, P i m p i n e l l a p a u c i d e n t a t a M a t t h e w s, P l a n t a g o major L. subsp. intermedia (Gilib.) Lange , Poa angustifolia L., Potentilla recta L., Potentilla speciosa Willd. var. speciosa , Reseda lutea L. var. lutea , Sanguisorba minor Scop. subsp. minor , Scorzonera tomentosa L.*, Scrophularia rimarum Bornm. , Scrophularia umbrosa Dum. , Silene odontopetala Fenzl , Stachys cataonica Bhattacharjee & Hub. -Mor.*, Tanacetum argenteum (Lam.) Willd. subsp. canum (C.Koch) Grierson var. canum , Taraxacum microcephaloides Van Soest , Taraxacum syriacum Boiss. , Teucrium chamaedrys L. subsp. syspirense (C.Koch) Rech. f. and Urtica dioica L. [Turkish endemics are indicated by an asterisk.]

Other specimens examined:— TURKEY. B6 Malatya: Darende, Aǧılbaşı (Engüzek) Belediyesi , Aǧılbaşı plateau, Beşdelik area , calcareous rock crevices, 38°34’N, 37°46’E, 1660 m, 13 September 2011, Yıldırım 2225 (paratype EGE!, isoparatypes C!, KOR!, LD!) GoogleMaps ; loc. ibid., 27 June 2011, Yıldırım 2181 ( EGE!) GoogleMaps ; loc. ibid., 13 September 2011, Yıldırım 2228 ( EGE!) GoogleMaps .