California supergroup Green Leaf Rustlers perform back-to-back nights at Fernwood in Big Sur.

Technically, the Green Leaf Rustlers have never rehearsed together. “We get to places early and do long soundchecks,” guitarist Greg Loiacono says. “Sometimes Chris [Robinson] sends a note before a show suggesting to throw in a song or two.”

Along with rock star Robinson, over the last couple years, pedal steel multi-instrumentalist Barry Sless (David Nelson Band), bassist Pete Sears (Jefferson Starship), drummer John Molo (Phil Lesh Quintet) and Loiacono (The Mother Hips) have compiled an ample catalogue of tunes, which center around California country, deep vinyl cuts and a jukebox of 1970s AM radio.

The setlist differs every night. During a recent four-night run in Jamaica, Loiacono says they only repeated a song a couple times. J.J. Cale, the Grateful Dead, the Byrds, Sir Douglas Quintet, Jimmy Reed, Waylon Jennings, Bob Dylan and The Band represent just a few names in their eclectic roster. There are even some curveballs like the Bee Gees’ “To Love Somebody” and Donovan’s psych-pop classic “Season of the Witch.”

Loiacono admits that GLR’s repertoire isn’t exactly full of complex songs. The focus is on the way the songs are unleashed by this tight supergroup.

“It’s about the delivery,” Loiacono explains. “The singing, the harmonies – if there are harmonies – the picking and the jams that are in between.”

While some of the songs are approached quite traditionally, with an A-bar solo or riff, some are stretched out like a new boot on a psychedelic cowboy’s foot. Some examples: Waylon Jennings’ “Waymore’s Blues” and a rendition of Johnny Cash’s “Folsom Prison Blues” that slips into Arthur “Big Boy” Crudup’s “That’s All Right Mama.”

“Everyone in the band loves the projects they do, but we can’t wait to play as the [GRL] again,” Loiacono says. “The band is just so amazing. We have Chris [Robinson], who is just a world-class singer and performer; there aren’t too many cats like him out there.”

Loiacono is a tireless one-of-a-kind artist in his own right: In addition to playing with the GLR and Mother Hips, he’s been working on a yet-to-be-titled solo LP, set to be released some time in 2019. He recently debuted the record’s first single, “San Felipe,” a tropicalia-meets-bossanova duet with Los Angeles folk singer Jamie Drake. Loiacono has been sitting on the tune – based on the true story of a trip with his wife – for almost two decades.

GREEN LEAF RUSTLERS 10pm (doors 9:30pm) Friday, March 15 and Saturday, March 16. Fernwood Tavern, 47200 Highway 1, Big Sur. $75-$240. 667-2422.