Erigeron intercalaris Sennikov, sp. 2023, hybr. nov.
4. Erigeron × intercalaris Sennikov, sp. hybr. nov. Fig. 7 Type. Russia. Karelian Republic: Louhi District, “Paanajärvi, Rajala, vägkant vid Mäntyjoki” [= northern side of Paanajärvi Lake, roadside between formerly populated places], 22.07.1936, H. Lindberg (holotype H 039504). Description. Stems 30...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2023
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| Online Access: | https://doi.org/10.5281/zenodo.10170260 http://treatment.plazi.org/id/C721DEB6F3F453A9B838577FCF4B182C |
| Summary: | 4. Erigeron × intercalaris Sennikov, sp. hybr. nov. Fig. 7 Type. Russia. Karelian Republic: Louhi District, “Paanajärvi, Rajala, vägkant vid Mäntyjoki” [= northern side of Paanajärvi Lake, roadside between formerly populated places], 22.07.1936, H. Lindberg (holotype H 039504). Description. Stems 30-50 cm tall, branched in the upper third or half, intensely to slightly purple-coloured, evenly covered by numerous hairs 1-2 mm long. Cauline leaves 4-8 under the synflorescence, spaced, gradually decreasing towards the stem top, completely covered by numerous hairs 0.5-1(1.5) mm long on both sides or subglabrous at the base below. Synflorescence with long branches carrying solitary to 2-3 capitula, nearly corymbose at the top, with numerous hairs 0.8-1 mm long. Phyllaries 6-7.5 mm long, purple-coloured completely or in the apical part, abundantly covered by hairs 1-2 mm long. Ray flowers intensely lilac. Pappus greyish-white. Flowers in July to August, fruits in August. Distribution in Murmansk Region. Tetrino Village, Apatity Town (Fig. 4D). Global distribution. Expected in the Boreal zone of Fennoscandia and Eastern Europe. Etymology. The species epithet ( intercalaris , Lat.: intercalary) reflects the intermediate morphology of the hybrid between its presumed parents. Nomenclatural note. The type locality has been extensively sampled for Erigeron plants, which were distributed by Lindberg (1944) in his exsiccatae. The material from the Mäntyjoki River distributed as Plantae Finlandiae Exsiccatae 1370 is taxonomically heterogeneous: a few plants of E. acris s.str. (H 339936 pro parte) were mixed with abundant collections of its hybrid with E. rigidus (H 339936 pro parte, H 039487, OULU 059260). The latter specimens are paratypes of our E. × intercalaris . The hybrid plants look very slender and depressed, much less vigorous than the specimens of E. acris s.str. collected in the same locality, thus probably indicating outbreeding depression (Bleeker et al. 2007). Taxonomic note. The hybrid differs from E. acris in ... |
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