Too many to count - my new favourite Polystichum site!
Very lightly divided - perhaps a hybrid with the neighbouring P. munitum
(avec Pascal Escudié, Jean Nicolas, David Genoud, Daniel & Françoise Vizcaïno)
First recorded here by Josef Armin Knapp 17.8.1865.
published in Schulzer, S., Kanitz, A., Knapp, A. (1866): Die bisher bekannten Pflanzen Slawoniens, Verh. Zool-Bot. Ges. in Wien 16: 3-172, Wien.
and also
Knapp, Joseph Armin (1867): Botanische Streifzüge durch Slavonien. – Österreichische Botanische Zeitschrift = Plant Systematics and Evolution – 017 111 - 126.