Cal. Civil Code § 1220

Contracts for the purchase or sale of standing timber or trees, for severance or otherwise, and all instruments in writing by which any estate or interest in, or right to cut, standing timber or trees is created, aliened, mortgaged or encumbered or by which the title to any standing timber or trees may be affected, may be acknowledged or proved, certified and recorded in like manner and with like effect, as grants of real property, and all statutory provisions relating to the recordation or nonrecordation of conveyances of real property and to the effect thereof shall apply to such contracts and instruments with like effect. Any such contracts for purchase and sale or instruments in writing affecting the title to standing timber or trees, executed and delivered before the effective date of the amendment of this section at the 1959 Regular Session of the Legislature but unrecorded before such date, shall become subject to all statutory provisions relating to the recordation or nonrecordation of conveyances of real property and to the effect thereof one year from said effective date.