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“Mexican fan palms should be removed and prohibited from being planted in California. And Italian cypress interior canopies must be kept clean or be removed from any neighborhood,” San Diego landscape architect Kay Stewart wrote.

He saluted cypress trees that “originated biologically at Point Lobos” and speculated that maybe they developed their horizontal, wing-like limb structure here to withstand coastal gusts.

Pollen from cypress pine trees, which have few natural protections against fire, fell dramatically, whereas pollen from more fire-tolerant eucalyptus, shrubs, and grasses became more common.

The most allergenic tree pollens are from birch, cypress, Japanese cedar, latex, grass, and ragweed.

We sprinted through the cypress glade, blind in the daylight, tripping over loose rocks.