Species definition of Dioon sonorense (Zamiaceae, Cycadales), and description of D. vovidesii, a new cycad species from northwestern Mexico
The genus Callitriche (Plantaginaceae: Callitricheae) in South America
Zamia brasiliensis, a new species of Zamia (Zamiaceae, Cycadales) from Mato Grosso and Rondônia, Brazil
Pytinicarpa (Asteraceae, Astereae) in New Caledonia