Onobrychis garinensis Dehshiri, 2019

Dehshiri, Mohammad Mehdi, 2019, Onobrychis garinensis (Hedysareae, Fabaceae), a new species from Iran, Phytotaxa 397 (3), pp. 237-245 : 238-240

Onobrychis garinensis Dehshiri sp. nov. ( Fig. 1 )

Onobrychis garinensis differs from O. alamutensis in having longer stipules (8–10 mm vs. 3–7 mm), a shorter corolla (9 mm vs. 14 mm), shorter standard (8–9 mm vs. 12–14 mm), shorter wings (6.5–7 mm vs. 10–11 mm), shorter keel (8.5 mm vs. 14 mm), different pod shape (crescent vs. semi-ovoid) and longer teeth on the crest (0.5–1.5 mm vs. 0.2–0.5 mm).

Type:— IRAN. Lorestan: northeast of Nurabad, Garin Mountain, 34°22′N, 48°28′E, 3200 m, 23 July 2013, Dehshiri & Goodarzi 105531 (holotype TARIǃ, isotypes TARIǃ).

Unarmed perennial plant with woody rootstock, never spiny, 0.2–0.5 m long, sparsely covered with white short, soft appressed hairs; stems ascending-erect, branching at base. Stipules connate at the base, triangular-subulate, margin membranous with brownish stripes, 8–10 mm long, covered with spreading hairs. Leaves imparipinnate, with (1–)3– 4(–5) pairs leaflets, 15–160 mm long, with sparse appressed hairs on lower surface, glabrous on upper surface; the lower leaves long petioles, 3–4(–5) pairs of leaflets, up to 160 mm long, obovate-oblong to linear or narrowly linear, apex obtuse to rounded, mucronate, 9–22 × 2–6 mm; upper leaves with short petioles, (1–)2–4 pairs of leaflets, 15–50 mm long, leaflets, linear or narrowly linear to subulate-linear, 7–30 × 0.5–3.0 mm; terminal leaflets 10–30 mm long, leaflet petiolulate, at most 1 mm long. Inflorescences longer than the leaves, slightly elongating in fruit, 90–180 mm long; racemes shorter to longer than peduncles, with 10–25 flowers, ± loosely arranged. Bract linear, 1.5–2.0 mm long, acuminate, sparsely with appressed hairs, shorter than calyx tube. Bracteoles filiform, minute, 0.5–0.6 mm long, membranous, minutely hairy. Calyx 5.5–6.0 mm long including teeth; calyx teeth linear-subulate, slightly longer than tube, 3.0– 3.5 mm long. Corolla glabrous, milky yellowish, 9 mm long; standard elliptic to oblong, obtuse-rounded, mucronate at apex, 8–9 × 4.0– 4.5 mm, ± as long as keel, with purple mid-vein and green lateral veins; wings with claw, 6.5–7.0 × 1.5 mm, slightly longer than calyx; keel 8.5 mm long, with claw 2 mm long. Pod exstipitate, 9.0–9.5 × 5–6 mm, crescent-shaped, dorsoventrally flattened, pale yellow-green, densely short appressed hairy; disc spineless, areoles of disc 8–10, in 2 rows; crest 2–3 mm long, areoles of crest rectangular, with 7–10 very short teeth up to 0.5–1.5 mm long. Seeds reniform, 4–5 × 2.6–3.4 mm, brown, smooth, compressed.

Etymology:— The specific epithet of the new species refers to type locality Garin Mountain, in western Iran.

Distribution:— Onobrychis garinensis is a narrowly distributed species endemic to the west of Iran. It is known only from individuals collected at the type locality and vicinities of the western slopes of the Garin Mountain, northeast of Nurabad city in Lorestan Province ( Fig. 2 ).

Habitat ecology and phenology:— This species comprises a single small and homogenous population growing in grassy and stony steppes with limestone soil as substrate, on steep alpine taluses, at 3200 m elevation in the Irano- Turanian region. Flowering and fruiting occurs in July–August. Onobrychis garinensis grows together with Allium capitellatum Boissier (1846b: 118) , Arabis caucasica Willdenow (1813: 45) , Artemisia persica Boissier (1846a: 91) , Astragalus zerdanus Boissier (1843: 51) , Chenopodium foliosum Ascherson (1864: 572) , Cousinia lasiolepis Boissier (1846a: 118) , Erysimum elbrusense Boissier (1867: 202) , Euphorbia cheiradenia Boiss. & Hohen. in Boissier (1853: 112), Galium decumbens ( Ehrendorfer 1958: 370) Ehrend. & Schönb. -Tem. in Schönbeck-Temesy (1991: 207), Graellsia saxifragifolia Boissier (1842: 379) , Minuartia lineata ( Boissier 1867: 677) Bornmüller (1910: 318) , M. recurva Schinz & Thellung (1907: 404) , Silene odontopetala Fenzl (1842: 9) , Thymus pubescens Boiss. & Kotschy in Čelakovský (1883: 152), Veronica kurdica Benth. in Candolle (1846: 473), and Ziziphora clinopodioides Lamarck (1791: 63) .

Figures

FIGURE 1. Onobrychis garinensis. A. habit. B. leaflets. C. stipules. D. bract. E. flower. F. corolla parts (from the left: standard, keel, wings). G. stamens & pistil. H. calyx. I. pod. Drawn by M. Mehranfard from the holotype specimen (TARI 105531).

FIGURE 2. Distribution map of Onobrychis garinensis (▲) and O. alamutensis (●) in Iran.