Botanical stamp of A mighty oak tree, a tropical palm, a cat sitting on a windowsill, a wise owl with big round eyes

naive folk art illustration on a postage stamp, bold black outlines, stippled dotted shading technique, cream off-white paper background, perforated serrated stamp edges, slightly aged paper texture, hand-drawn feel, limited 2-3 color palette, small decorative elements, square format, stamp fills the entire image, NO padding outside stamp edges, NO background frame, NO border outside the stamp, ONLY the stamp itself visible, detailed plant or flower as subject, fine crosshatching, muted green and cream palette, scientific illustration feel. Subject: A mighty oak tree, a tropical palm, a cat sitting on a windowsill, a wise owl with big round eyes. No text, no words, no letters, no numbers. The stamp fills the entire image with NO outer padding or frame - ONLY the stamp itself visible, NOTHING else.