40 个字符的摘要：南加州标志性的棕榈树，墨西哥棕榈树或针棕榈树，其破烂的叶子和掉落的果实种子对人类构成危险。 40-character summary: Southern California's iconic palm trees, Mexican or needle palms, pose hazards with tattered fronds and fruit-dropping seeds.

400 个字符的摘要：南加州的标志性棕榈树，主要是墨西哥棕榈树或针棕榈树（华盛顿棕榈树），占据了天际线和明信片的大部分。 400-character summary: Southern California's iconic palm trees, mainly Mexican or needle palms (Washingtonia robusta), dominate the skyline and postcards. 虽然它们很优雅，但却有危险的破烂叶子和掉落的果实种子，它们会在各个地方发芽。 Though elegant, they have hazardous tattered fronds and fruit-dropping seeds that sprout in various areas. 这些树也被称为“加州蒲公英”，并不是棕榈树优雅的最佳代表。 These trees, also called "California dandelions," are not the best representatives of the palm tree's elegance.