Japanese brome Disturbed sites, especially on S. side beyond park. Bromus tectorum downy cheatgrass Present throughout butte, especially on S. side. Bromus vulgaris Columbia brome Open sites on N. side. Calochortus elegans elegant cat's-ear Most abundant on rocky soil near the summit. Calypso bulbosa Venus-slipper Moist woods beneath shrubs.
Campanula rapunculoides creeping bellflower Along trail.
Carex concinnoides northwest sedge Very abundant on N. side, especially where moist. Carex geyeri elk sedge Dry habitat. Castilleja hispida harsh paintbrush Abundant on rocky soil. Very abundant on W. end, occasionally at E. end. Cirsium vulgare bull thistle Found throughout butte, most abundant on several overgrazed areas S. and W. of summit near the base of the butte.