Erigeron-glabratus_16

Description:

Erigeron glabratus Hoppe & Hornsch. ex Bluff & Fingerh., syn.: Erigeron alpinus subsp. glabratus (Bluff & Fingerh.) Briq., Erigeron uniflorus subsp. glabratus (Bluff & Fingerh.) Ces., Erigeron alpinus subsp. polymorphus Wilczek & Schinz, Erigeron polymorphus subsp. graecus Vierh.Family: Compositae GisekeEN: Variable Fleabane, DE: Kahles Berufkraut, Vielgestaltiges BerufkrautSlo.: mnogolina suholetnicaDat.: Avg. 1, 2019Lat.: 46.357584 Long.: 13.70357 (WGS84)Code: Bot_1236/2019_DSC09601Habitat: moderately steep mountain slope, southeast aspect; above river bead; calcareous, colluvial, skeletal ground; semi dry, sunny, open place; high air humidity; elevation 540 m (1.770 feet); average precipitations ~ 3.000 mm/year, average temperature 6-8 deg C, alpine phytogeographical region. Substratum: sandy soil.Place: Lower Trenta valley, between villages Soa and Trenta, right bank of river Soa; above Soa trail in Matev's gorge, upstream of the farmhouse Matev, Trenta 1; East Julian Alps, Posoje, Slovenia EC. Comment: Erigeron glabratus is a South European montane species growing in (almost) the whole Alps, Pyreneans, Apennines and Carpathians. It is usually found at subalpine and alpine elevations. This find at 540 m elevation is unusually low. The species is a very variable plant. Its Latin synonym name Erigeron polymorphus, as well as Slovenian, German and English vernacular names confirm this fact. Sometimes it is not easy to separate it from quite similar Erigeron uniflorus and Erigeron alpinus. The plants found and shown here have (alas not all of them) more than one flower head on each stalk (hence not 'uniflorus') and lack two different types of tubular florets in the heads (the most characteristic trait of Erigeron alpinus). However, ligule (flattened part of the ray corolla) are white. This happens only seldom (Ref.: 1). Usually they are light purple-pink, light wine-red or light violet. Ref.:(1) M.A. Fischer, W. Adler, K. Oswald, Exkursionsflora fr sterreich, Liechtenstein und Sdtirol, LO Landesmuseen, Linz, Austria (2005), p 881.(2) A. Martini et all., Mala Flora Slovenije (Flora of Slovenia - Key) (in Slovenian), Tehnina Zaloba Slovenije (2007), p 647. (3) D. Aeschimann, K. Lauber, D.M. Moser, J.P. Theurillat, Flora Alpina, Vol. 2., Haupt (2004), p 440.