semiligneous

from The Century Dictionary.

• Half or partially ligneous or woody: in botany noting a stem which is woody at the base and herbaceous at the top, as in common rue, sage, and thyme.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Half or partially ligneous, as a stem partly woody and partly herbaceous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Half or partially ligneous.