undated
16.51 x 20.64 cm (6 1/2 x 8 1/8 in.)
Graphite and colored pencil on paper
20th centuryAmericanColored marker, black and white photographs, and adhesive on paper
20th centuryGermanGraphite on paper
20th centuryGerman?Graphite on off-white wove paper
20th centuryAmericanOil paint on offset lithograph, 1989 edition of Flora de la Real Expedición Botánica del Nuevo Reino de Granada (1783-1810)
21st centuryPeruvianCharcoal and colored chalks on a ground of rubbed charcoal heavily modeled by erasures, on off-white wove paper, mounted on Kraft paper and wrapped around a strainer
20th centuryAmericanGraphite on paper
20th centuryGermanGraphite on paper
20th centuryGermanBlack crayon on paper
20th centuryGerman?Black ink over graphite on off-white wove paper
19th-20th centuryAmericanGraphite on off-white wove paper
20th centuryAmericanMixed media
20th centuryGerman