taxonID	type	description	language	source
4C5FAD6DFFE71019EC82909AFB2DAAE4.taxon	discussion	The status of Tessendorff’s Hieracium collection now located in the backlog of the Botanical Museum Berlin is unclear because it does not appear in the herbarium records and the specimens do not bear any information concerning their acquisition. Possibly the material was already on the premises of the Botanical Museum at the time of Tessendorff’s death and was not subsequently recorded. Furthermore, it would be conceivable that the material was relocated to a safe place after the fire disaster of 1943 and survived the Second World War outside Berlin as did the other, as yet unprocessed Hieracium collections of Karl Touton (Vogt 1998), Hans Schack (Vogt 1999) and Josef Bornmüller. The collection comprises 565 specimens, including 11 type specimens of nine names described by Karl Hermann Zahn, who studied Tessendorff’s collections for his monumental treatments of the genus in Engler’s Das Pflanzenreich (Zahn 1921 – 1923) and in Ascherson & Graebner’s Synopsis der mitteleuropäischen Flora (Zahn 1922 – 1938). The carefully prepared specimens were kept unmounted in covers. The information on the labels is meagre and normally without further details on locality or altitude in addition to the geographic information. Fig. 1 presents a selection of labels used by Tessendorff. There are two types of labels: simple field labels with brief information on place and date of collection in Tessendorff’s handwriting and the stamped addition “ F. Tessendorff. ” (Fig. 1 A, B) and blank labels with the printed headline “ Museum botanicum Berolinense. ” and the stamped footnote “ leg. F. Tessendorff ” into which Tessendorff himself (Fig. 1 C) or later Berlin herbarium staff (Fig. 1 D) entered the information by hand. Karl Hermann Zahn’s determination remarks and his signature “ Z ” can be found on nearly all specimens (e. g. Fig. 1 A – D, Fig. 2) and it can be assumed that Tessendorff regularly submitted his collections to the monographer of the genus for identification. Zahn listed Tessendorff’s collection in his treatment for Engler’s Das Pflanzenreich among the Hieracium collections he had seen (Zahn 1921 – 1923: 1573). In view of the loss of Zahn’s herbarium at the end of the Second World War, the specimens in Tessendorff’s collection are of particular importance today. The herbarium material was almost exclusively collected by Tessendorff himself in the time between 1902 and 1922 in Germany including the former eastern territories, as well as Italy, Austria and Switzerland. Specimens from the following areas are extant (year of collection in brackets).	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE71019EC82909AFB2DAAE4.taxon	materials_examined	GERMANY: BADEN-WÜRTTEMBERG: Freudenstadt (1921), Hohenzollern (1921), Kaiserstuhl (1916, 1918), Murgtal (1921), Neubreisach (1918), Schönmünzach (1921), Schwäbische Alb (1919), Schwarzwald (1910, 1919), Weingarten (1921); BAYERN: Banz (1919), Bayerischer Wald (1920), Berchtesgaden (1911), Fichtelgebirge (1922), Fränkische Schweiz (1916), Lichtenfels (1916, 1919), Vilshofen (1920), Würzburg (1910); BERLIN UND BRANDENBURG: Angermünde (1922), Grunewald / Berlin (1920), Botanischer Garten (1920), Buckow (1921), Chorinchen (1921), Diehloer Berge (1909), Erkner (1920), Freienwalde (1919), Fürstenberg (1909), Glindow (1920), Hoppegarten (1921), Jahnberge (1909), Joachimsthal (1921), Liepnitzsee (1921), Luckow, Mittenwalde (1909), Müncheberg, Niederfinow (1910), Niemegk (1922), Oranienburg (1919), Potsdam (1908), Rüdersdorf (1920, 1921), Spandau (1921), Sperenberg (1919, 1921), Tegeler Forst (1920), Uckermark (1916), Werbellinsee (1921), Zossen; MECKLENBURG-VORPOMMERN: Usedom (1921); HARZ (NIEDERSACHSEN UND SACHSEN-ANHALT): Altenau (1922), Benneckenstein (1922); HESSEN: Braunfels (1922), Limburg / Lahn (1921, 1922); RHEINLAND-PFALZ: Altenbamberg (1916), Bad Dürkheim (1914, 1916), Bad Ems (1921), Bad Kreuznach (1909, 1911, 1912, 1921, 1922), Balduinstein (1922), Braubach am Rhein (1921), Heidesheim-Ingelheim (1904), Höchstenbach (1922), Katzenelnbogen (1922), Oberlahnstein (1921); SACHSEN: Hoyerswerda (1916); SACHSEN-ANHALT: Altmark (1915), Havelberg (1911), Stendal (1908, 1919); THÜRINGEN: Altenberg (1922), Berka (1916), Blankenburg (1919), Kyffhäuser (1921); WESTERWALD: (1921); NOT LOCATED: Rosental (1902), Weidental (1908). — AUSTRIA: Kärnten (1911), Salzburg (1911), Tirol (1911). — BELARUS: leg. Bothe (1918). — FRANCE: Mülhausen [Mulhouse] (1918), Vogesen (1910, 1911). — ITALY: Friaul (1911), Görz [Gorizia] (1912), Triest [Trieste] (1912). — LITHUANIA: Kurische Nehrung [Kuršių nerija]. — POLAND: “ WESTPREUSSEN ”: Bellinchen [Bielinek] (1916), Briesen [Wąbrzeźno] (1910), Drausensee bei Elbing [Druzno near Elbląg] (1908, 1910, 1920), Eylau [Iława] (1919), Kulmsee [Chełmża] (1908), Löbau [Lubawa] (1919), Marienburg [Malbork] (1920); “ OSTPREUSSEN ”: Allenstein [Olsztyn] (1919), Miswalde [Myślice] (1919), Nikolaiken [Mikołajki] (1920), Sensburg [Mrągowo] (1920); “ POMMERN ”: Bublitz [Boblice] (1920), Rummelsburg [Miastko] (1920), Swienemünde [Świnoujście] (1921), Stettin [Szczecin] (1922); “ SCHLESIEN ”: Glatz [Kłodzko] (1922), Neurode [Nowa Ruda] (1922), Riesengebirge [Karkonosze] (1910), Strehlen [Strzelin] (1922). — RUSSIA: “ OSTPREUSSEN ”: Insterburg [Tschernjachowsk, ЧерНЯХовск] (1919), Kurische Nehrung [Kurschskaja kossa, КуршскаЯ коса] (1919). — SWITZERLAND: Simplon (1912), Wallis (1911, 1912), Graubünden (1912), St. Gotthard (1913). Only few specimens from other collectors are included: H. Bothe, K. Hahn, H. Preuss, E. Rebholz and F. Roemer. Exsiccata are not present. Index herbariorum (Vegter 1988) indicated Berlin (B) and Geneva (G) as the herbaria housing plant material collected by Tessendorff. The duplicate specimens of Tessendorff’s Russian plant collections presented to Johannes Abromeit in Königsberg [Kaliningrad] were destroyed in the Second World War.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE01019EF2A9277FC0DA8E4.taxon	materials_examined	– Lectotype (designated here by Gottschlich): [Germany]: Niederfinow – Oderberg, 20 Aug 1910, F. Tessendorrff (B [B 10 1154393]). – Current name: Pilosella echioides (Lumn.) F. W. Schultz & Sch. Bip.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE01019EF2A9277FC0DA8E4.taxon	discussion	Remarks — The specimen has been determined by K. H. Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE01019EF5593F7FC0DAE44.taxon	materials_examined	– Syntype: [Germany]: Bellinchen (Oder), 4 Jun 1916, F. Tessendorff (B [B 10 1154361]). – Current name: Pilosella euchaetia (Nägeli & Peter) Soják.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE01019EF5593F7FC0DAE44.taxon	discussion	Remarks — The specimen has been determined by K. H. Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE01019EF559517FC2EAC64.taxon	materials_examined	– Lectotype (designated here by Gottschlich): [Germany]: Beuron: am Weg zum Maurusfels, 8 Aug 1919, F. Tessendorff (B [B 10 0448385 + B 10 0448386 on two sheets]; isolectotype: (B [B 10 0448389 + B 10 0448388 on two sheets]). – Current name: Hieracium laevigatum subsp. istrogenes Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE01019EF559517FC2EAC64.taxon	discussion	Remarks — The original labels of all four sheets bear the handwritten determination particulars of K. H. Zahn dated 1919.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE0101AEF559777FD83AA44.taxon	materials_examined	– Holotype: [Germany]: Bellinchen (Oder), 4 Jun 1916, F. Tessendorff (B [B 10 1154437]). – Current name: Pilosella leptophyton (Nägeli & Peter) S. Bräut. & Greuter.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE0101AEF559777FD83AA44.taxon	discussion	Remarks — The blank label (“ Museum botanicum Berolinense. leg. F. Tessendorff ”) bears the handwritten determination particulars of K. H. Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC829117FD99A9A4.taxon	discussion	Remarks — The original label bears the handwritten determination particulars of K. H. Zahn stating “ H. murorum subsp. oblongum var. koserovense ” and “ Tessend. et Zahn ” as authors of the new name.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC8292B7FE09AE24.taxon	materials_examined	– Lectotype (designated here by Gottschlich): [Germany]: Berlin – Tegeler Forst, 29 May 1920, F. Tessendorff (B [B 10 1154496]) [Fig. 3]. – Current name: Hieracium murorum subsp. suevicola Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC8292B7FE09AE24.taxon	discussion	Remarks — The blank label (“ Museum botanicum Berolinense. leg. F. Tessendorff ”) bears the handwritten determination particulars of K. H. Zahn. Although it is usually appropriate to select a lectotype among specimens from an exsiccata series, here we selected Tessendorff’s specimen, because we never saw material collected by Hohenacker. Perhaps the indication of “ Hohenacker, Arznei-Pfl., n. 353 ” made by Zahn refers to a specimen formerly at B and now destroyed.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC829537FE87ADA4.taxon	materials_examined	– Syntype: [Lithuania and Russia]: Kurische Nehrung, 13 Jul 1919, F. Tessendorff (B [B 10 1154511]). – Current name: Hieracium umbellatum L. subsp. umbellatum.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC829537FE87ADA4.taxon	discussion	Remarks — The original label of F. Tessendorff bears the handwritten determination particulars of K. H. Zahn dated 1919.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC8296B7FB01AA44.taxon	materials_examined	– Holotype: [Poland]: Bublitz – Drawehn [Bobolice – Drzewiany], Pommern, 11 Jul 1920, F. Tessendorff (B [B 10 0673427]). – Current name: Hieracium lachenalii subsp. chlorophyllum (Jord. ex Boreau) Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEC8296B7FB01AA44.taxon	discussion	Remarks — The blank label (“ Museum botanicum Berolinense. leg. F. Tessendorff ”) bears the handwritten determination particulars of K. H. Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEF0F9117FCF7A984.taxon	materials_examined	– Lectotype (designated here by Gottschlich): [Germany]: Westerwald: Tal der Nister bei Niedermörsbach, 16 Jul 1921, F. Tessendorff (B [B 10 0673429]; isolectotype: B [B 10 0673428]). – Current name: Hieracium lachenalia subsp. tridentatoides (Zahn) Zahn.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
4C5FAD6DFFE3101AEF0F9117FCF7A984.taxon	discussion	Remarks — The specimens bear K. H. Zahn’s handwritten determination particulars on the label stating “ Hieracium vulgatum subsp. acuminatum var. tridentatoides Zahn ”.	en	Vogt, Robert, Gottschlich, Günter (2022): Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection. Willdenowia 52 (1): 83-90, DOI: 10.3372/wi.52.52105, URL: https://doi.org/10.3372/wi.52.52105
