Bolanthus sandrasicus Hamzaoğlu & Koç, Nordic

Yildizbaş, Avni & Koç, Murat, 2025, The taxonomic revision of genus Bolanthus (Caryophyllaceae) in Türkiye, Phytotaxa 696 (1), pp. 28-54 : 46-47

Bolanthus sandrasicus Hamzaoğlu & Koç, Nordic Journal of Botany 35: 563–568 (2017).

Type:— [ Turkey C2 Muğla] Köyceğiz, South of Kartal Lake, 1960 m a.s.l, subalpine serpentine flats, 17 Jul 2016, Koç 2343 & Hamzaoğlu (holotype GAZI!; isotypes: GAZI!, ANK!, Bozok Univ. Herb.!) .

Description ( Figs. 14–16 ): — Perennial herb forming lax cushions. Stems ascending-erect, 2–3 cm long, 0.8–1.2 mm in diameter at base, with mixed eglandular and glandular hairs, 3–6-noded; internodes short, 1–2 mm long. Leaves linear-setaceous, 3–6 × 0.5–0.7 mm, glandular-hairy, 3-nerved, greenish, rigid; apex acute; sheath membranous, 0.2–0.3 mm long, glandular-hairy. Inflorescence congested in small sessile or subsessile terminal or subterminal clusters, 4–10- flowered, densely glandular-hairy; flowers sessile. Bracts linear-setaceous, 3.0–4.5 × 0.5–0.7 mm, as long as calyx; apex acute. Calyx tubular, densely glandular-hairy, 2.5–4.0 × 0.8–1.2 mm, with 5 projecting ribs; teeth lanceolate, 1.0– 1.3 mm long, with acute apex, purplish. Petals oblanceolate, 4.0–5.5 × 0.8–1.0 mm, 1.5 times longer than calyx, purple; apex rounded; base cuneate. Stamens 10; filaments 2.0– 3.5 mm long. Styles 2.2–2.5 mm long. Capsule oblong, 2.5–3.5 × 0.8–1.2 mm, 2–4-seeded, usually as long as calyx. Seeds brown, comma-shaped, with prominent radicle, 0.9–1.1 × 0.6–0.8 mm; ventral and dorsal surfaces with irregular polygonal cells.

Phenology: May–July, 1960 m, serpentine areas.

General Distribution: Endemic. East Mediterranean element.

Distribution for Türkiye: Aegean and Mediterranean region.

Notes:— The taxon was firstly defined with the name Bolanthus sandrasicus by Koç, Hamzaoğlu and Büyük in 2017 ( Koç et al. 2017). It is similar to B. thymoides Hub.-Mor. but differs by stems 2–3 cm long (vs. 3–8 cm long), inter-nodes 1–2 mm (vs. 2–5 mm), calyx 2.5–4.0 mm long, teeth purplish (vs. 4–5 mm long, greenish), petals oblanceolate, 4.0– 5.5 mm long, purple (vs. linear-oblong, 5–6 mm long, white with purple veins), capsule 2.5–3.5 mm long (vs. 3.5–4.5 mm long), and seeds with ventral and dorsal surfaces having irregular polygonal cells (vs. regular rectangular cells). The taxon grows on the subalpine serpentine areas. Also, due to overgrazing, the habitat of this speciesis is under threat, it has been recommended to be placed in the EN B1a category ( IUCN 2017). Its distribution in Türkiye was given in Figure 16 .

Figures

FIGURE 14. Bolanthus sandrasicus (Koç 2343 & Hamzaoğlu).A—habit, B—inflorescence, C—flower, D—petal, E—capsule.

FIGURE 15. Bolanthus aziz-sancarii (Koç 1209 & Hamzaoğlu). A—habit, B—inflorescence, C—flower, D—petal, E—capsule.

FIGURE 16. Distribution of taxa Bolanthus sandracicus (▲) and Bolanthus aziz-sancarii (D) in Türkiye.