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centaurium by mary vaux walcott

small tiger lily by mary vaux walcott

moss campion by mary vaux walcott

slender agoseris by mary vaux walcott

saltmarsh rosegentian (sabbatia stellaris) (1926) by mary vaux walcott

winterberry (ilex verticillata) (1920) by mary vaux walcott

white thistle (cirsium hookeranum) by mary vaux walcott

hedge bindweed (calystegia convolvulus sepium) (1932) by mary vaux walcott

butterfly pea (clitoria mariana) (1934) by mary vaux walcott

odontoglossum cervantesii decorum by frederick sander

hybrid of laelia and cattleya species by frederick sander

cypripedium leeanum var giganteum by frederick sander

odontoglossum vexillarium by frederick sander

odontoglossum triumphans by frederick sander

cattleya rochellensis by frederick sander

cattleya o'brieniana by frederick sander

odontoglossum insleayi splendens by frederick sander

stanhopea shuttleworthii by frederick sander

image of a nebula by nasa

masdevallia chimæra var mooreana by frederick sander