Folk Music Jam Sessions — Pull out your fiddles, guitars, mandolins, penny whistles, pipes, flutes, squeezeboxes — you name it! — and join your fellow musicians during the lunch hour for a little bluegrass, old-time, blues, Celtic, klezmer and other world music. All skill levels welcome. Listeners, too! Noon Fridays, Feb. 4 and 18, Wyatt Deck.

Native Californian Elderberry Flute-Making Workshop —
Antonio Flores, East Bay Regional Parks docent, returns to lead another workshop on the Native Californian tradition of making flutes from elderberry wood — and to teach people how to play the flutes. All materials are supplied; please bring sharpened pocketknives. All ages are invited; adults must supervise their young children. No reservations needed. 1-3 p.m. Sunday, Feb. 6, 146 Environmental Horticulture.

Walk with Warren — With the arboretum's retired superintendent, Warren Roberts. Noon Wednesday, Feb. 9, gazebo.

Acacia Grove in Bloom — Brilliant yellow blooms and honeylike fragrance. 2 p.m. Saturday, Feb. 26, arboretum headquarters.

All programs are free and open to the public. More information: (530) 752-4880 or arboretum.ucdavis.edu (for directions, click on “Plan Your Visit”).