Sponsored by the Portola Valley Cultural Arts Committee, the exhibit is open to the public on weekdays from 3 to 6 p.m. until February 27.
An artist, environmentalist, art framer and writer, Mr. Dengler lived in Portola Valley until he died in 2002 at the age of 90.
Portola Valley Town Historian Nancy Lund says: "He was one of the founders of the town and helped establish the town's core values. He was also the founder of the Jasper Ridge Biological Preserve docent program. And, in the early days of The Almanac, he wrote a regular nature column."
Mr. Dengler also helped found the Portola Valley Conservation Committee, and built many hiking trails in the area.
His son, Ronald Dengler of Toronto, donated the portfolio of wildflower watercolors to the town of Portola Valley, which maintains a historic archive in the heritage center next to the library.
A limited edition of the paintings is available for purchase in slightly smaller-sized 17-by-8.5-inch prints. The pricing is $90 for one, $75 for four or more, and $1,500 for the complete set of 24.
Proceeds go to the buyer's choice: Portola Valley Open Space Acquisition Committee or Jasper Ridge Biological Preserve, "two causes dear to Herb's heart," Ms. Lund says.
For more information email her at firstname.lastname@example.org.
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