Calystegia occidentalis

Calystegia occidentalis is a woody perennial herb in the morning glory family, known by the common names Modoc morning glory and chaparral false bindweed. It is native to California and Oregon, where it grows in hilly and mountain habitat such as woodland, chaparral slopes and the high Sierra Nevada. The plant sends out spreading or twisting and climbing branches that are usually quite hairy. Its small leaves reach up to 4 centimeters long and are lobed into various spade or arrowhead shapes. The inflorescence is one to four flowers on a single peduncle, and each bloom is 2 to 5 centimeters wide and white, cream or yellow in color. The Global Biodiversity Information Facility treats it as an accepted species in the genus Calystegia, family Convolvulaceae and order Solanales, while Wikipedia files the same plant under the name Convolvulus occidentalis.