P5 Washingtonia robusta (Mexican Fan Palm)

Washingtonia robusta in parking lot, next to LEAF

Native to: Western Sonora and Baja California.
Growth: Up to 90 feet tall
Fronds: Fan shaped with 3 foot long petioles that have orange saw tooth spikes along the edges.
Note: Washingtonia robusta (Mexican fan palm) and W. filifera (California fan palm) hybridized over the years in nurseries. Some people call them W. filibusta.
Water Requirements: Medium (all year)
Family: Arecaceae
Subfamily: Coryphoideae
Tribe: Livistoneae

Washingtonia robusta in pollinator garden.
This was probably planted in 1884.

Learn more about Washingtonia robusta:

Palmpedia
Wikipedia
SelecTree
Monrovia

Photograph 1887 of California Nursery.
Washingtonia's seen here might be the newly planted palms that are full grown in the park today.
Map notation says that the palms in the pollinator garden were the palms planted in 1884.