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When you go for a Walk with Warren (as in Warren Roberts, the arboretum's superintendent emeritus), you're getting way more than a nature tour. You're also getting an adventure in storytelling and puns. Warren's next walk, noon to 1 p.m. Wednesday (Sept. 11), will take in the west end gardens. Meet at the .

Come Friday (Sept. 13), the arboretum turns the movie classic The Days of Wine and Roses into "The Night of Wine and Shovels" — for a wine tasting and shovel collection event at the (next to Whole Foods Market at the Davis Commons shopping center, First Street and Richards Boulevard). The 6 to 8 p.m. event is limited to members of — including those who sign up at the gate. Suggested donation: $5 or a used shovel (for a public art project).

MORE AT THE ARBORETUM

• Folk Music Jam Sessions — Pull out your fiddles, guitars, mandolins, penny whistles, pipes, flutes, squeezeboxes — you name it! — and join your fellow musicians for a little bluegrass, old-time, blues, Celtic, klezmer and other world music. All skill levels welcome. Listeners, too! Noon-1 p.m. Friday, Sept. 13 and 27, .

• Late Summer in the Native Plant Garden — The Mary Wattis Brown Garden of California Native Plants includes many examples of Arboretum All-Stars, recommended for valley-wise gardens. 9:30-10:30 a.m. Saturday, Sept. 14, meet at the .

• Butterfly Ecology Talk and Tour — Naturalist Steve Daubert presents this program on the ecological relationship between flowering plants and Lepidoptera, the insect order that includes butterflies. 11 a.m.-12:30 p.m. Sunday, Sept. 29, starting on the .

FALL PLANT SALES

The arboretum announced a theme of "The New Front Yard" for the fall season's two sales: Saturday, Oct. 5, and Sunday, Oct. 20.

All programs are open to the public, and all are free except the Oct. 5 plant sale, where admission if limited to members, although anyone may join at the gate. More information: (530) 752-4880 or (for directions, click on “Plan Your Visit”). Keep up with arboretum news by reading The Leaflet e-newsletter. To start receiving it, send an email to arboretum@ucdavis.edu, with “newsletter” in the subject line.