| american angelica tree | (n) small deciduous clump-forming tree or shrub of eastern United States, Syn. devil's walking stick, Aralia spinosa, Hercules'-club |
| blackthorn | (n) a thorny Eurasian bush with plumlike fruits, Syn. sloe, Prunus spinosa |
| common caper | (n) prostrate spiny shrub of the Mediterranean region cultivated for its greenish flower buds which are pickled, Syn. Capparis spinosa |
| hedge thorn | (n) South African shrub having forked spines and plumlike fruit; frequently used as hedging, Syn. natal plum, Carissa bispinosa |
| indian mallow | (n) tropical American weed having pale yellow or orange flowers naturalized in southern United States, Syn. Sida spinosa |
| restharrow | (n) Eurasian plant having loose racemes of pink or purple flowers and spiny stems and tough roots, Syn. rest-harrow, Ononis spinosa |
| smoke tree | (n) greyish-green shrub of desert regions of southwestern United States and Mexico having sparse foliage and terminal spikes of bluish violet flowers; locally important as source of a light-colored honey of excellent flavor, Syn. Dalea spinosa |
