Resurrection of the enigmatic species Prangos akymatodes (Apiaceae) from Central Afghanistan Author Lyskov, Dmitry Department of Higher Plants, Faculty of Biology, Lomonosov Moscow State University, 1 - 12 Leninskie Gory, 119234, Moscow, Russia Author Samigullin, Tahir Department of Evolutionary Biochemistry, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 1 - 40 Leninskie Gory, 119234, Moscow, Russia text Phytotaxa 2017 2017-10-27 326 3 202 210 http://dx.doi.org/10.11646/phytotaxa.326.3.4 journal article 10.11646/phytotaxa.326.3.4 1179-3163 13698903 Prangos akymatodes Rechinger & Riedl in Køie & Rechinger (1963: 111) Type :— AFGHANISTAN . Shanbashak Pass , Prov. Darra-i-Suf, 9000 ft. , dry rocky slopes, 31.08.1939 ( 31 Aug. 1939 ), Koelz 13875 ( lectotype : US catalog No.: 3151765, barcode 00289235 [image!], designated here by Lyskov; isolectotype : W ! barcode W 1988- 0010066 ) . Polycarpic, herbaceous plants with thick tap-root ( Fig. 3 ). Stems 60–80 cm tall and 5–6 mm Ø at base, mainly single, thin-grooved, scabrous, alternately branched from middle part, covered with remains of petioles and sheaths. Basal leaves formed rosette, petioles up to 8 cm long, scabrous; leaf blades 18–22 cm long, 10–15 cm wide, 3–4 times pinnate; leaf segments from first to second with petiolules; terminal lobes 3–7 mm long, 0.3–0.5 mm wide, subulate, acute; stem leaves significantly smaller than basal leaves. Terminal umbels 8–10 cm Ø , with 13–16 rays; rays 4–5 cm long, thickened, glabrous, unequal; umbellets up to 2.5 cm Ø , 10–15 flowers, with 2–4 linear, prickly, entire, bracteoles. Pedicels equal, 0.8–1.2 cm long, terete, glabrous. Mericarps broadly elliptic ( Fig. 1A ), 10–15 × 7–8 mm , homomorphic, dorsally compressed; only primary ribs presented, all ribs straight, suberose, with continuous margin, lateral ribs more wide and well-developed; commissure intermediate; mesocarp divided into an outer “epimesocarp” and inner mesocarp; inner mesocarp divided into five completely separated parts, consisting of parenchymatous cells with thickened and pore walls, “epimesocarp” consisting of parenchymatous, nonlignified cells; endosperm with mushroom-like groove at commissural side. Distribution:— The species is known only from the locus classicus : Afghanistan , Darah Sof district, Shanbashak Pass.