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Ulmus parvifolia

CHINESE ELM

LOCATION: 245–255 Hartford St./19th St. in the Castro; many examples on both sides of Folsom St. between 24th and 26th Sts. in the Mission

The Chinese elm is by far the most common elm on San Francisco streets. A medium- to large-sized tree (growing to 30–35 feet), it keeps its leaves year-round in San Francisco’s mild climate and develops an attractive weeping form as it matures. The 1- to 2-inch leaves are smaller than those on other urban elms; this elm is also distinguished by bark that sheds in patches, creating beautiful two-toned (gray and brown) mottled patterns. Chinese elms are resistant to Dutch elm disease, which has decimated the American elm in most of the United States. San Francisco elms have not yet been affected by Dutch elm disease, and you can still find American elms here and there in the city. The Chinese elm is native to northern China, Japan, and Korea.

Sequoia sempervirens

COAST REDWOOD

LOCATION: Redwood Park on the east side of the Transamerica Pyramid in the Financial District. Muir Woods in Marin County is the best spot nearby to see coast redwoods in their native glory.