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Rare plant persists in salty soils at Livermore preserve

by on September 24, 2012

Palmate-bracted bird’s–beak at Springtown Preserve. Photos by Christine Kelly.
Palmate-bracted bird’s–beak at Springtown Preserve. Photos by Christine Kelly.

In the highly alkaline, salty soils of Springtown Preserve near Livermore, few annuals can make it through the hot, dry summer months. But the Palmate bracted bird’s-beak has found a way.

The member of the snapdragon family (Cordylanthus) secretes out salt, which collects as crystals on its leaves. A deep root system allows it to go on growing in the hot, dry months after most other annuals have died.

Still, habitat destruction and the encroachment of non-natives have reduced the California native to just six remaining locations. Springtown Preserve has 80 percent of the endangered plant’s genetic diversity.

“The preserve is the No. 1 botanical hotspot in the East Bay,” said Lech Naumovich, director of the Golden Hour Restoration Institute.

Invasive grass in competition with the Palmate-bracted bird’s-beak.

Naumovich led a team of volunteers out to Springtown earlier this month to survey the number of Palmate bracted bird’s beak. Using GPS equipment to survey roughly half the area, the team found 16 Palmates and nine Hispid bird’s beak, a close relative.

Volunteers flagging colonies in the preserve.

Naumovich said non-native grasses are taking hold in Springtown preserve and changing the soil composition to make it less saline, imperiling the Palmate’s survival. The grasses are also killing off nesting sites for ground nesting bees, which are the Palmate’s main pollinator.

Springtown preserve is owned by the city of Livermore and is open to the public. Visitors should tread lightly, stay on paths, and avoid stepping on the Palmate and other sensitive plant species.

A damselfly lands on another of Springtown’s native plants — the iodine bush. Photos by Christine Kelly.

Christine Kelly is a Bay Nature editorial intern.

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Ameet Zaveri on September 25th, 2012 at 12:20 am

The insect in the last photo is a damselfly, not a dragonfly.

Alison Hawkes on September 25th, 2012 at 8:16 am

Ok. We fixed. Thanks for catching!

Doreen Smith on September 28th, 2012 at 2:03 pm

The Jepson Manual 2 now classifies the plant as being in the genus Choropyron and the family “Broomrape”- Orobanchaceae.

Lech Naumovich on October 1st, 2012 at 11:52 am

Thanks for the wonderful article Bay Nature! It’s so great to see coverage for our least gregarious of plants – the salty, late season hemiparisites! They are indeed cool plants and we had so many great volunteers helping us sniff this plant out!

A Successful Palmate-bracted Bird’s-beak Survey | on September 8th, 2014 at 11:58 am

[…] We also want to thank Bay Nature for it’s fabulous coverage of our community rare plant survey! […]

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