Taxonomic revision of critical taxa of Elwendia (Umbelliferae-Apioideae) from Tajikistan and neighbouring countries, with descriptions of three new species from the Pamir-Alay and distributional novelties Author Kljuykov, Eugene V. 0000-0002-7984-8906 Botanical Garden, Faculty of Biology, M. V. Lomonosov Moscow State University, 1 - 12 Leninskie Gory, 119991, Moscow, Russia & kljuykov @ gmail. com; https: // orcid. org / 0000 - 0002 - 7984 - 8906 kljuykov@gmail.com Author Lazkov, Georgii A. 0000-0002-3531-8524 Laboratory of Flora, Institute of Biology, National Academy of Sciences, 265, Chui av., 720071, Bishkek, Kyrgyzstan & glazkov 1963 @ mail. ru; https: // orcid. org / 0000 - 0002 - 3531 - 8524 glazkov1963@mail.ru Author Degtjareva, Galina V. 0000-0002-8198-5360 Botanical Garden, Faculty of Biology, M. V. Lomonosov Moscow State University, 1 - 12 Leninskie Gory, 119991, Moscow, Russia & degavi @ mail. ru; https: // orcid. org / 0000 - 0002 - 8198 - 5360 degavi@mail.ru Author Zakharova, Ekaterina A. 0000-0003-2601-0998 Botanical Garden, Faculty of Biology, M. V. Lomonosov Moscow State University, 1 - 12 Leninskie Gory, 119991, Moscow, Russia & eazakhar @ yandex. ru; https: // orcid. org / 0000 - 0003 - 2601 - 0998 eazakhar@yandex.ru Author Ukrainskaja, Uljana A. 0000-0002-0142-4249 Botanical Garden, Faculty of Biology, M. V. Lomonosov Moscow State University, 1 - 12 Leninskie Gory, 119991, Moscow, Russia & ulja _ ukr @ mail. ru; https: // orcid. org / 0000 - 0002 - 0142 - 4249 ulja_ukr@mail.ru Author Lyskov, Dmitry F. 0000-0003-0818-1662 Department of Higher Plants, Faculty of Biology, M. V. Lomonosov Moscow State University, 1 - 12 Leninskie Gory, 119991, Moscow, Russia & df. lyskov @ yandex. ru; https: // orcid. org / 0000 - 0003 - 0818 - 1662 df.lyskov@yandex.ru Author Samigullin, Tahir H. 0000-0002-9135-3367 A. N. Belozersky Institute of Physico-Chemical Biology, M. V. Lomonosov Moscow State University, 1 - 40 Leninskie Gory, 119992, Moscow, Russia & samigullin. t. h @ gmail. com; https: // orcid. org / 0000 - 0002 - 9135 - 3367 samigullin.t.h@gmail.com text Phytotaxa 2022 2022-04-22 543 5 255 273 journal article 55862 10.11646/phytotaxa.543.5.1 b40278ef-bbc6-431d-a1eb-ff957abe7673 1179-3163 6479422 Key to the species of Elwendia in Tajikistan , also including E. kuhitangi and E. bucharica 1. Leaves (sometimes only upper leaves) with geniculate rachis..........................................................................................................2. - Rachis not geniculate.........................................................................................................................................................................4. 2. Stems hollow; upper stem leaves with more than 4 pairs of leaflets; bracteoles absent or solitary; fruits drooping, separating into mericarps from upper part ........................................................................................................................ Elwendia chaerophylloides - Stems solid; upper stem leaves with 1–4 pairs of leaflets; bracteoles 2–8; fruits erect, separating into mericarps from the base ...... ...........................................................................................................................................................................................................3. 3. Uppermost stem leaves with short triangular sheaths and more or less numerous bundle-shaped segments; bracteoles 2–4(5); styles 0.8–1 mm long...................................................................................................................................................... Elwendia lindbergii - Uppermost stem leaves with narrow sheaths 2.5–4 cm long, pinnatisect with several segments; bracteoles 5–8; styles 1.2–1.6 mm long................................................................................................................................................................ Elwendia seravschanica 4. Styles erect, slightly spreading or hooked; not appressed to stylopods ............................................................................................5. - Styles recurved and usually appressed to stylopods..........................................................................................................................8. 5. Uppermost stem leaves with segments up to 4 cm long; bracteoles 5–8; styles up to 2 mm long........................... Elwendia capusii - Uppermost stem leaves with segments up to 1.5 cm long; bracteoles absent or 1–3; styles about 1.3 mm long .............................6. 6. Terminal segments of radical leaves 1–2 mm long; bracteoles absent or rarely 1–3; petals with several secretory ducts; styles erect ..................................................................................................................................................................... Elwendia bucharica - Terminal segments of radical leaves more than 3.5 mm long; bracteoles 2–4; petals with solitary secretory ducts; styles slightly spreading or hooked ..........................................................................................................................................................................7. 7. Terminal segments of radical leaves linear, 4–6 mm long, 0.7–1 mm wide; terminal umbels pedunculate with 2–7 rays; pedicels up to 7 mm long; stylopods without vallate-thickened margin; styles 1.2–1.3 mm long........................................... Elwendia schistosa - Terminal segments of radical leaves lanceolate or linear-lanceolate, 3.5–7 mm long, 0.9–2.5 mm wide; terminal umbels sessile with 1–3 rays; pedicels up to 3 mm long; stylopods with vallate-thickened margin; styles 0.7–0.8 mm long.................................... ............................................................................................................................................................................. Elwendia darwasica 8. Stem leaves with extended ovate-lanceolate sheaths ........................................................................................... Elwendia varsobica - Stem leaves with narrowly linear or lanceolate sheaths....................................................................................................................9. 9. Pedicels at fruiting sometimes strongly thickened, divaricate; fruits hardly separating into mericarps .........................................10. - Pedicels at fruiting thin, not divaricate; fruits easily separating into mericarps .............................................................................12. 10. Terminal segments of radical leaves ovate; terminal segments of uppermost stem leaves lanceolate or linear; pedicels at fruiting distinctly divaricate; fruits with a beak 2.5–3 mm long .......................................................................................... Elwendia latiloba - Terminal segments of radical leaves linear; terminal segments of uppermost stem leaves filiform; pedicels at fruiting slightly divaricate; fruits without a beak ......................................................................................................................................................11. 11. Terminal segments of uppermost stem leaves 3–5 mm long; umbels with 2–3 rays; mericarps narrowly linear, 4.5–5.5 mm long, 0.4–0.7 mm wide .................................................................................................................................................. Elwendia kuhitangi - Terminal segments of uppermost stem leaves 7–12 mm long; umbels with 5–10 rays; mericarps linear, 4.2–6.5 mm long, 1–1.5 mm wide ............................................................................................................................................................................. Elwendia salsa 12. Stems hollow; fruits without a sharp smell ........................................................................................................ Elwendia intermedia - Stems solid; fruits with a sharp, sometimes agreeable, smell ... 13. 13. Bracts 3–6; endosperm with a hollow at the commissural side; vallecular vittae 2–3 (1 wide and 1–2 narrow) ................................ .................................................................................................................................................................... Elwendia badachschanica - Bracts absent or 1–2; endosperm almost flat at the commissural side; vallecular vittae solitary ...................................................14. 14. Radical leaves differ sharply from upper stem leaves, their terminal segments incised into small ovoid lobules; umbels at fruiting spherical; pedicels 2–4 times longer than fruits; petals triangular, cuneate at the base ........................................... Elwendia persica - Radical leaves similar to upper stem leaves, their terminal segments incised into lanceolate lobules; umbels at fruiting corymbose; pedicels up to 1.5 times longer than fruits; petals elliptic ..................................................................................... Elwendia hissarica