Bessie Slater's Beautiful 19th Century Ink and Watercolor Botany Chart: Stems, Appendages, Calices measuring 5 1/16 x 1 7/8

5 1/16 x 1 7/8 and in good antique condition

I can't quite tell from the cover whether this belonged to Fern

rolled up inside

and I look at a lot of them

Bessie Slater's Beautiful 19th Century Ink and Watercolor Botany Chart: Stems, Appendages, Calices measuring 5 1/16 x 1 7/8This is one of a series of beautiful antique ink and watercolor charts listed today, all executed long ago by a Bessie Slater (I believe, signed on the back of one of them), for a botany class, I presume. Each one homes in on a different aspect or aspects this one detailing stems (scaly, hairy, etc), appendages (sheath, tendril, etc) and calices (imbricated, double calyx, etc with 30 different sorts described and carefully illustrated in watercolor.