The Marin Municipal Water District and the California Academy of Sciences are looking for people with an interest in botany, photography or data-gathering to help them catalog plant life in the Mount Tamalpais Watershed. Volunteers will be trained so they can join at least five botanists and two ecologists in a series of “bioblitzes” through August to collect observations and samples of life on Marin’s defining peak. At least 900 plant species are found in…