Abstract—The genus Hechtia includes 84 species, 79 of them present in Mexico. With 12 species (including those described herein), the Mexican state of Guerrero is the third most diverse in species. As a result of botanical explorations for the project Bromeliaceae of Mexico, we describe here five new species for science, all endemic to Guerrero: Hechtia elegans, H. ensifolia, H. medusae, H. platyphylla, and H. pycnostachya. The proposed species are compared with other morphologically similar taxa (H. caulescens, H. flexilifolia, H. glauca, H. hintoniana, H. laxissima, and H. pretiosa). Morphological descriptions, images, and a distribution map of the described taxa are included, as well as an identification key for all the species of Hechtia currently known from Guerrero.

Abstract— The genus Hechtia includes 91 species (with those described herein), 88 of them present in Mexico, and the entire genus is endemic to the region termed Megaméxico 3 by Rzedowski. With 21 species, the Mexican state of Puebla is the second most species rich. As a result of botanical exploration for the project Bromeliaceae of Mexico, we describe here seven new species, all endemic to Puebla: Hechtia anarosae, H. dasylirioides, H. espejoana, H. longissimifolia, H. microcarpa, H. minimiflora, and H. vicesphaeroblasta. The proposed species are compared with morphologically similar taxa (H. caulescens, H. ensifolia, H. flexilifolia, H. fragilis, H. podantha, and H. sphaeroblasta). Morphological descriptions, images, and a map with distributions of the described taxa are included, as well as an identification key and a list of specimens examined of all the species of Hechtia currently known from the state of Puebla. Keywords—Balsas Basin, endemism, monocots, Poales.

Recent botanical explorations carried out in the Guerrero state for the project Bromeliaceae of Mexico led to the discovery of two new species, both endemic to Guerrero: Hechtia kruseana and H. rosamariae. The new taxa are compared with the morphologically similar: H. anarosae, H. caulescens, H. jaliscana and H. stenopetala. Hechtia kruseana differs from these by the diameter of the rosettes (50-60 cm) and by the length of the staminate and pistillate inflorescences (190-275 cm). Hechtia rosamariae differs from morphologically related species by the size of floral bracts (1.5-2.0 × 0.7-1.0 mm) and the length of the petals (3.0-3.2 mm) of staminate flowers; by the length (2.3-2.6 mm) and shape (ovate) of the sepals, and width of the petals (1.7-2.0 mm) of pistillate flowers. Morphological descriptions, images, and a map showing the distribution of the described taxa are included, as well as an identification key for all the species of Hechtia present in Guerrero.