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Those plants, grown from locally collected seed, include black sage, white sage and purple sage, California buckwheat, long-stem buckwheat and ashy leaf buckwheat, wild grape; narrow-leaf milkweed, California bush sunflower; deerweed; showy penstemon, toyon, laurel sumac and ceanothus.

“It’s a beautiful mix of pine and oak forest. Wonderful riparian areas too, though there isn’t a lot of surface water. It’s big so it’s a good bet. I was just up a couple weeks ago. The ceanothus blooms were stunning. The monkey flower, deerweed, penstemon and lupines were out in force too. Wildflower blooms last longer and start later the higher you go up in elevation. So quiet at certain times of the day. It’s an entirely different world than down in the valley.”

Meanwhile, the Presidio Trust and other organizations worked to restore the butterflies’ native dunes, planting deerweed — a preferred host plant of the Xerces Blue and the Silvery Blue butterflies.

The design team’s plant palette for the crossing includes 30 species — local sages such as black sage, white sage and purple sage; buckwheat varieties including California buckwheat, long-stem buckwheat and ashy leaf buckwheat; wild grape; narrow-leaf milkweed; California bush sunflower; deerweed; penstemon; and needle grass and other grasses.

The design team’s plant palette for the crossing includes 30 different species — local sages such as black sage, white sage and purple sage; buckwheat varieties including California buckwheat, long-stem buckwheat and ashy leaf buckwheat; wild grape; narrow-leaf milkweed; California bush sunflower; deerweed; and penstemon, needle grass and other grasses.