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(Vol.18, 2015-12) Verbesina Tiburonensis (Asteraceae: Heliantheae), A New Species from Isla Tiburón, Gulf of California, Mexico
Verbesina tiburonensis is a new species from Isla Tiburo´ n, Sonora, Mexico. It is closely related to Verbesina palmeri and V. oligocephala both native to Baja California.
(Vol. 20, 2017-12) Perymenium vandevenderorum (Asteraceae), a New Species From Sonora, Mexico.
A novel species of Perymenium from Sonora, Mexico is described. It appears to be closest to P. nesomii from southwestern Chihuahua, with which it is compared. A map showing distribution of the two taxa is provided.