si tu pouvais juste traduire ca (tableau comparatif de ton lien)
Washingtonia filifera Washingtonia robusta
Petioles (leafstems) are green and relatively are brown and distinctly thorny
of young palms unarmed (no thorns)
Basal sheath does NOT have a bright tawny has a bright tawny-colored patch
(bottom of the base -colored patch
of the leaf blade)
Crown (of mature specimans) has leaves in a loose and open is dense and compact
arrangement
Leaflets are pendulous and swinging (not stiff), are stiff and their cottony threads
and the cottony threads persist fall off