RCW 1.20.020
State tree.
That certain evergreen tree known and described as the western hemlock (Tsuga heterophylla) is hereby designated as the official tree of the state of Washington.
[ 1947 c 191 § 1; Rem. Supp. 1947 § 10964-120.]
Structure Revised Code of Washington
Chapter 1.20 - General Provisions.
1.20.015 - Display of national and state flags.
1.20.017 - Display of national league of families' POW/MIA flag.
1.20.037 - State marine mammal.
1.20.038 - State endemic mammal.
1.20.050 - Standard time—Daylight saving time.
1.20.051 - Daylight saving time.
1.20.052 - Permanent daylight saving time—Intent.
1.20.055 - Pacific daylight time.
1.20.071 - State song—Proceeds from sale.
1.20.100 - Diverse cultures and languages encouraged—State policy.
1.20.130 - Preferred terminology in government documents.