Answer: Mexican Hat is Ratibida columnifera. It's a member of the Aster family; the flowers have drooping yellow or brownish purple rays and a tall, columnar brown cone. It looks like a sombrero with a drooping brim, hence the name Mexican Hat. The plant is available from Monrovia (in 1-gallon containers). Your local nursery can order for you, now that you're armed with the botanical name. Good luck with your new garden!
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