Northern Dragonhead

Flora Berolinensis : Berlin :Die Schule,1757-1758. biodiversitylibrary.org/page/59792260

Nouvelle flore coloriée de poche des Alpes et des Pyrénées. v.1. Paris,Klincksieck,1906-1912. biodiversitylibrary.org/page/10478466

Die Alpenpflanzen nach der Natur gemalt /. Prag :F. Tempsky,1879-1884.. biodiversitylibrary.org/page/39676430

Description: English: Dracocephalum ruyschiana, on the slope of Inn valley between Bever and Samedan, Upper Engadine, Switzerland Deutsch: Nordischer Drachenkopf (Dracocephalum ruyschiana), am Hang des Inntals zwischen Bever und Samedan, Oberengadin, Schweiz. Date: 7 July 2014. Source: Own work. Author: Robert Flogaus-Faust. Other versions: : This file has been extracted from another file: Dracocephalum ruyschiana RF.jpg : .

Description: English: Dracocephalum ruyschiana, on the slope of Inn valley between Bever and Samedan, Upper Engadine, Switzerland Deutsch: Nordischer Drachenkopf (Dracocephalum ruyschiana), am Hang des Inntals zwischen Bever und Samedan, Oberengadin, Schweiz. Date: 7 July 2014. Source: Own work. Author: Robert Flogaus-Faust. Other versions: This file has an extracted image: File:Dracocephalum ruyschiana RF (cropped).jpg..

Description: Dracocephalum ruyschiana L. Original Caption Ruysch-Drachenkopf, Dracocephalum ruyschiana. Date: 1796. Source: Figure from Deutschlands Flora in Abbildungen at http://www.biolib.de. Author: Johann Georg Sturm (Painter: Jacob Sturm).