There were 3 illustrations found for J. Beckmann
6 1452663 Ipomoea perringiana DammerE.A. von Regel, Gartenflora, vol. 47 : t. 1446 (1898) [J. Beckmann]
2 326123 Dendrobium bigibbum Lindl.E.A. von Regel, Gartenflora, vol. 49 : t. 1473 (1900) [J. Beckmann]
Rhododendron sp.E.A. von Regel, Gartenflora, vol. 51 : t. 1499 (1902) [J. Beckmann]