Bupleurum wolffianum Bornmüller ex Wolff (1910: 93)

Stoyanov, Stoyan, 2018, Taxonomic redefinition of Bupleurum pauciradiatum and B. wolffianum (Apiaceae), Phytotaxa 365 (2), pp. 130-144 : 141-142

Bupleurum wolffianum Bornmüller ex Wolff (1910: 93) ≡ Bupleurum pauciradiatum var. wolffianum (Bornm.) KosoPoljansky (1915: 271)

Type :— IRAN. Flora Persiae boreali-occidentalis, Hasanbeili, in silvis caeduis, 17 September 1884, J. Knapp s.n. (holotype WU 0069467 , photo!, Virtual Herbaria JACQ; isotype JE 00002670 !) .

= Bupleurum leptocladum Koso-Poljansky (1912: 12) , syn. nov. ≡ Bupleurum pauciradiatum var. leptocladum (Koso-Pol.) Koso-Poljansky (1915: 271) .

Type:— AZERBAIJAN. Transcaucasia. Prov. Elisabethpol, distr. Schuscha , inter frutices prope locum Chan-Kendy [Xankəndi], August 1900, S. Fedossejew (lectotype TU 284427 , photo!, designated here; isolectotype LE, photo!) .

Annual, (30–)50–100(–120) cm, with a conspicuous main stem and long pseudo-dichotomous branches in the middle and the upper part. Stem erect, ± flexuous, 4-angular in the upper part, cylindrical below, finely striate, smooth. Branches wide-spreading, secondary branches not appressed to the main branches, filiform, the shorter patent, the longest up to 25 cm, ± loosely at apex. Stem leaves 20–90 × (2–)4–10(–15) mm, middle oblong-lanceolate, mucronate, with angustate base and 3–7 veins visible beneath, not withered after anthesis, upper narrowly lanceolate, margins scabrous. Umbels 2(–3)-rayed, rays 10–35(–40) mm, subequal, filiform, ± divergent, the longest slightly arcuatespreading, lateral umbels often 1-rayed and 1-flowered, loosely downward, long-pedunculate. Bracts (2–)3, 1–4 × 0.5–0.8 mm, narrowly lanceolate, acuminate, carinate, 3-veined, erect, serrulate only at apex. Bracteoles (4–)5, 3–4 × 0.5–0.7 mm, linear-subulate, acuminate, carinate, with 3 inconspicuous veins, margins entire or serrulate at apex, in flowers and fruits erect to erecto-patent, equal in length to the flowers, quite shorter than fruits. Umbellules (1–)3–7- flowered, pedicels 1–2 mm, in fruits up to 3 mm, subequal. Petals bright yellow, remain yellowish when dried, limb 0.45–0.55 mm wide, obtrapezoid to wide elliptical, slightly dentate on margins, inflexed lobe a little narrower than limb, apically slightly bifid, reaches the base of limb, petal bend distinctly papillose. Stylopodium 0.3–0.4 mm broad, quite narrower than fruits, styles 0.2–0.25 mm, shorter than stylopodium radius. Mericarps 2.2–3 × 0.9–1.1 mm, rounded in transect, unripe smooth, glaucous, ripe finely rugulose, brown, ribs inconspicuous. Vittae small, vallecular 2–3, commissural 2–4.

Distribution: —The distribution area of B. wolffianum is clearly associated with the region of Transcaucasia and northwestern Persia. The literature ( Koso-Poljansky 1915; Mandenova 1973, 1984; Rechinger & Snogerup 1988) and herbarium data indicate that the species occurs at least in 10 localities in Armenia, Azerbaijan, Georgia and northwestern Iran ( Fig. 8 ). The occurrence in the Crimea is quite questionable and needs confirmation.

Figures

FIGURE 8. Distribution of Bupleurum pauciradiatum (solid circles) and Bupleurum wolffianum (solid triangles).