⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record gcc-1712, and has not been changed.

Hieracium caesium subsp. improvisum (Norrl.) Zahn is a synonym of Hieracium improvisum Norrl.

This name is a synonym of Hieracium improvisum Norrl..

The record derives from TICA which reports it as a synonym (record 3A618B63-8D29-4C36-9313-031626AFB831) with original publication details: "Zahn, in Engler, Pflanzenr. 76. 1921." 455 1921.