Antecedentes y Objetivos: Castilleja nervata y C. tenuiflora var. xylorrhiza estaban reportadas para 11 y cinco estados de México, respectivamente. El objetivo de este estudio fue determinar los caracteres morfológicos de C. nervata para diferenciarla de C. arvensis, identificar a C. tenuiflora var. xylorrhiza dentro del complejo C. tenuiflora y separar este último de C. integrifolia var. integrifolia, así como mostrar la distribución geográfica y documentar la similitud morfológica de los taxones.Métodos: Se revisaron ejemplares de herbario y se colectaron los taxones, además de que se tomaron medidas y se caracterizaron las estructuras morfológicas de los especímenes encontrados en el Parque Nacional Cañón del Río Blanco, mismos que fueron determinados con base en la literatura.Resultados clave: Se determinaron dos taxones del género Castilleja que no estaban reportados con anterioridad para la flora del estado de Veracruz, México. Se proporcionan dos cuadros comparativos para la identificación de los taxones correspondientes al complejo C. tenuiflora y para diferenciar entre C. arvensis y C. nervata, así como fotografías y un mapa de distribución de los nuevos registros.Conclusiones: Estos taxones forman parte de las 10 especies y ocho variedades del género Castilleja presentes en Veracruz. Además, se recomienda revisar el género en otros estados de México y continuar con la exploración botánica del Parque Nacional Cañón del Río Blanco.

Aphyllon castilloi Franc.‐Gut., Cházaro & Espejo (Orobanchaceae), a new species discovered in central Veracruz, Mexico is herein described, illustrated and compared with other Aphyllon species recorded from Mexico. The new species inhabits tropical semideciduous forest, a novel ecosystem for Aphyllon species native to North America, in contrast to most collections from Mexico, which are from warm sandy deserts. In addition, it parasitizes Simsia foetida (Asteraceae: Heliantheae). As far as known, the distribution of the new species is very restricted.

A new species of Agalinis from the state of Veracruz is herein described, illustrated and compared with A. flexicaulis, A. harperi, A. maritima var. grandiflora, and A. peduncularis. This new taxon was found in a single locality in the northern coast of Veracruz, Mexico, near to a mangrove-swamp. Given its highly restricted distribution, this species is considered as endemic, being critically endangered as a consequence of local urbanization.

Jatropha chazaroi is described and illustrated as a new species from the state of Veracruz, Mexico. It is morphologically similar to J. podagrica but is distinguished by being a tree or shrub devoid of a caudex (vs. shrub with caudex) and lacking persistent and spinescent stipules (vs. having persistent and spinescent stipules). Its flowers possess connate staminate and pistillate calyces and corollas (vs. not connate). Jatropha chazaroi is only known from the municipality of Apazapan, Veracruz, and thrives in shady sites throughout intermittent waterways.

After almost 30 years since the last description of a Lamourouxia species, in this paper, two new species are described, illustrated, and compared. The new species are endemic to the states of Durango, Jalisco, Nayarit, and Sinaloa in western and northwestern Mexico, and as several species of the genus, these are of restricted geographic distribution and have scarce representation in biological collections. The new species belong to Lamourouxia section Hemispadon. With these new species Lamourouxia reaches a total of 30 species all occurring in the American continent.