Detail from Ivan Ripley’s Black Flower (1967), spotted at @nickreedfilmposters’ booth at Old Spitalfields Market — a must-stop in London on Thursdays 
Related:
Captain Midnight (1966)
Ultraviolet
Our Mother Ocean, Rick Griffin
Rick Griffin, 1975
Ecology Is for Children
Howard Bernstein, Sunkissed
Retina Circus, 1968
Pandora Productions
Union Light Co, 1969
R. Crumb, Fox River Patriot
Green Mountain Quarterly, 1976
Star Magazine, 1973
Philippe Caza
Austin, 1976
Prairie Jackson, Halloween ‘77
Julia Fryer, 1973
The Oracle on the Pentagon, 1967
Seattle Helix, February 1968
Novalis, 1976
Extra Soul Perception, 1968
Witches and Guns
Jacqui Morgan
Star, 1974
The Ark, 1967
Greg Irons, 1967
PiPaPop, 1969
Bill Ogden, London Britches
Jim FitzPatrick, 1972
Natural Act
National Library Week, 1969