18th-19th century
Graphite on darkened off-white wove paper
19th centuryAmericanBlack ink on cream wove paper
20th centuryAmericanPastel and graphite on white wove paper
20th centuryAmericanCharcoal, graphite, and colored crayon over gray wash on white wove paper
20th centuryGermanGraphite on paper
20th centuryGermanGraphite on paper
19th centuryBritishBlue-black ink on off-white wove paper
20th centuryAmericanBlack ink on blue wove paper
20th centuryAmericanOpaque watercolor on off-white paper
20th centuryCanadianBlack ink on white wove paper
21st centuryAmericanAcrylic 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 centuryPeruvian