Orobanche turcica G.Zare & Dönmez, 2014

Zare, Golshan & Dönmez, Ali A., 2014, A new species of Orobanche (Orobanchaceae) from Turkey, Phytotaxa 184 (3), pp. 148-154 : 151-153

Orobanche turcica G.Zare & Dönmez , sp. nov. ( Figure 1 )

Type: — TURKEY. Marash [Kahramanmaraş]: distr. Gokaun [Göksun]: Hobek [Höbek] mountain, 2000 m on Salvia , 21 June 1952, Davis 20192- Dodds & Çetik, (holotype E!, isotypes BM!, K!, ANK!). The collection we propose as holotype from Edinburgh has three duplicates in K, BM and ANK. We chose the specimen from E because P.H. Davis kept the original collection in E and sent duplicates to other herbaria .

Diagnosis: —This species is similar to Orobanche anatolica in habit, dense inflorescence, bract indumentum, seed surface ornamentation and pollen type. It differs by having a gamosepalous calyx with 4 equal teeth, a pale pinkish-brown corolla with a straight dorsal line, corolla lobes that are lanate on the inner side, and stamens inserted 5–6 mm above the base of corolla.

Stem simple, 12–45 cm long, 5–10 mm wide at middle, slender, dark red or brown, glandular-pubescent. Scales 15–25 × 4–8 mm, narrowly ovate or lanceolate. Inflorescence 6–24 × 3.5–5.5 cm, cylindrical to lanceolate, longer than or equal to the remaining part of the stem, dense (25–45 flowers), with erect flowers. Bract 15–25 × 5–7 mm, narrowly ovate to lanceolate, red-brown, densely glandular pubescent, in the lower part of the inflorescence equal to or shorter than the corolla, bracts in the upper part of the inflorescence equal to or longer than the corolla. Calyx 15–22 mm long, gamosepalous in dorsal part for up to 1 cm, with 4 or rarely 5 equal teeth; calyx teeth 6–17 mm, lanceolate to linear, with a conspicuous middle vein. Corolla 25–35 mm long, tubular or campanulate, slightly inflated above the insertion of stamens, pale pink or yellow, with a straight dorsal line; lobes of the upper lip acute, deflexed; lobes of the lower lip 5–6 mm, ovate, acute, serrate at margin, deflexed; corolla lobes covered with lanate hairs on the inner side and glandular hairs on the outside, ciliate-pilose at margin. Stamens inserted 5–6 mm above the base of corolla-tube; filaments 10–16 mm long, densely pubescent at base; anthers conspicuously mucronate, 3 mm long, woolly. Pollen heteromorph (inaperturate, tricolpate or dicolpate); P 23.57 ± 1.03 μm, E 23.82 ± 0.98 μm, pollen shape (P/E) oblatespheroidal; exine thickness ca. 1 μm; intine ca. 1 μm or less thick, perforate. Ovary 5–6 mm long, elliptic; style 10–16 mm long, sparsely glandular-pubescent. Capsule 8–12 × 4–6 mm. Seed ovate, oblong or pear shaped, 0.495 ± 0.046 × 0.288 ± 0.019 mm, brown; seed ornamentation reticulate, with isodiametric or irregular polygonal cells, their number 6–8 in one line; ornamentation of the periclinal walls smooth.

Flowering and fruiting time June to July.

Etymology: —The specific epithet refers to Turkey, where the specimens have been collected from.

Habitat:— Subalpine meadows, elevation 1400–2000 m. Host: Salvia (Lamiaceae) and probably Onosma (Boraginaceae) .

Distribution: — Turkey, endemic to the Irano-Turanian phytogeographic region.

Examined specimens of Orobanche turcica : — TURKEY.A3 Bolu: Gölcük, Sünnet lake, under Pinus nigra forest, 13 July 2009, host Onosma, Ali A. Dönmez 15903 (HUB!). B3 Isparta: Kızıl Dağ National Park, 1600–1700 m, 25 June 1994, B. Mutlu 922 (HUB!). B5 Niğde: Hasan Dağı, above Taşpınar. c. 1300 m, 15 June 1952, Davis 18905, Dodds & Çetik (K!). B7 Malatya: Venk, Tavşan hill, limestone, 1400–1600 m, 7 July 1996, B. Yıldız 13691 (INU!). B9 Bitlis: N. flank of Nemrut mountain, 1830 m, 3 June 1954, Flowers pale yellow, Davis 23597 and O. Polunin (BM!, ANK!).

Figures

FIGURE 1. Orobanche turcica. A. Habit; B. and C. Corolla and lower lip; D. Flower with insert showing hairs of corolla lobes; E. Bract; F1 and F2. Calyx and multicellular glandular hair; G. Anthers; H1. Gynoecium; H2. Style and stigma; I. Seed.