"Plate 902. Rhododendron Floribundum. Ericaceae... Western Szechwan and Eastern Yunnan"

Incredibly finely finished and minutely detailed watercolor on paper.  Accompanied by scientific text meticulously recorded by hand.

10 x 7 ¼ inches, sheet.
Ink and watercolor on paper.
Excellent condition with right edge perforated by stapled binding.