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We describe and illustrate Agastache sandersiana as a new species from northwestern Durango. This is a narrow endemic that clearly differs from all other species in the genus by leaf size, shape, and pubescence; inflorescence architecture; calyx tube length; corolla color; and corolla tube length. Additionally, an identification key to the Agastache species occurring in Durango, Mexico is provided.

The aim of this study was to describe the composition and biological forms of wetland vegetation in the municipality of Durango, in north-western Mexico. Similarity patterns of the flora were explored using the Jaccard index. A total of 79 species were recorded, from which 33 are aquatic and 46 subaquatic, including 3 new state records. Contrary to what was expected, the smaller wetlands had the highest diversity values, higher than the ones of ponds and of a large flooding area. More than half of the species was recorded from the Malaga area, a complex of wetlands of high ecological and environmental value, so the conservation of that site is suggested. The similarity analysis shows 2 groups of wetlands: one from the upland region and another from the valley area. The structure of the vegetation shows emergent plants dominating shallow waters and the plants with floating leaves increasing towards deeper areas, whereas no pattern was found for the submersed and floating plants. The results of this study support the Malaga wetland management plan and can be useful for the decision makers for the regional wetlands preservation.

Salvia ozolotepecensis , S. patriciae and S. sirenis (Lamiaceae) from Oaxaca, Mexico, are described and illustrated as three new species. The first one is characterized by its glandular-capitate pubescence in stems, leaves and inflorescences, mostly persistent floral bracts, entire and 5-veined upper calyx lip, red corolla, epapillate inside, included stamens, and connective ornate with opposed retrorse and antrorse teeth bordering an incision. It is most similar to S. perlonga and S. praestans to which it is compared. The second can be distinguished in having ovate to ovate-deltoid leaf blades, entire, acute and 7-veined upper calyx lips, red corollas, internally ornate near the base with two slender linguiform papillae, upper corolla lip shorter than the lower one, exserted stamens and glabrous style. This new taxon is morphologically similar to the species belonging to Salvia sections Cardinales , Charantia , Incarnatae , Flexuosa , Fulgentes , Iodophyllae and Pedicellata ; although, it cannot be unambiguously assigned to one of these. In contrast, S. sirenis clearly belongs to S. sect. Scorodonia ; amongst the species therein, the new species can be differentiated by the concolorous leaves, rounded to slightly oblique at base, 6–8-flowered floral nodes, longer floral bracts, pedicels, calyces and corollas, and 5 or 7-veined upper calyx lip. Also, it represents an addition to Mexican Salvia with white corollas. The molecular markers ITS, trn L -trn F and trn H- psb A were sequenced for two of the three new species, and their phylogenetic position is discussed.

The genus Lobelia is cosmopolitan and comprises 423 species in 18 sections. Lobelia sect. Stenotium is the most diverse group with 153 species, has a wide distribution in continental North America and is segregated into two subgroups based on the presence of spurred flowers. There are 16 spurred Lobelia species that occur in streamside or seep areas, throughout pine and oak mixed forests from USA to Costa Rica, but they are frequent along the Pacific slopes of the Sierra Madre Occidental (SMO), Mexico, where 10 species grow. In this paper we present a synopsis of the spurred species of Lobelia in the SMO and propose two new taxa. First, Lobelia rzedowskii is morphologically similar to L. ayersiae, L. cordifolia and L. endlichii but differs by its rosulate leaves, blades 0.5–1.5 × 0.4–1 cm, subsessile, racemose to paniculate inflorescences, with (4–)10–35(–191) flowers, flowers 4–6 mm long including hypanthium, spur 0.5–1 × 0.5–0.8 mm, with the lower two calyx lobes positioned at the middle portion of the spur, white corolla with a yellow spot above lobe sinuses on the throat and staminal tube 1.3–2.5 mm long. Second, Lobelia saturnini is morphologically similar to L. knoblochii, L. macrocentron, L. mcvaughii and L. villaregalis, but differs from them by leaves (2–)4–14(–17) mm long, petioles 2–6(–17) mm long, solitary flowers, flowers 12–16 mm long including hypanthium, hypanthium 1.2–2.5 mm long, spur 2–3 mm long, pedicels (1.3–)2–9(–12) cm long and anthers 1–2.2 mm long. We include an identification key for spurred species of Lobelia in the SMO, photographs, distribution notes with a map, and illustrations.

The new species Salvia wixarika from Sierra Madre Occidental region (northern Jalisco, Mexico) is here described and illustrated. This is one of the few Mexican species characterized by having corollas entirely white. It is morphologically related to S. sphacelifolia but differs by the absence of glandular-capitate hairs, leaf shape, floral bract length, pedicel length, number of veins in the upper calyx lip, filament length, connective and style length. It is also similar to S. collinsii but differs in size and duration of floral bracts, pedicel length, calyx width, corolla length, lower lip size, filament length, connective length, theca and style length. Additionally, the updated descriptions of S. collinsii and S. sphacelifolia are provided.

El nombre de Agave victoriae-reginae se ha aplicado a un grupo de plantas endémicas al norte de México fácilmente distinguibles de otras especies de Agave por tener hojas con márgenes córneos sin dientes, bandas blancas sobre ambas caras y flores con tubos cortos en forma de embudo. Su revisión taxonómica revela que lo que se conoce como A. victoriae-reginae es un complejo que incluye tres especies, una de ellas con dos subespecies: 1a) A. victoriae-reginae subsp. victoriae-reginae (del occidente de Nuevo León y extremo oriental de Coahuila; 1b) A. victoriae-reginae subsp. swobodae (sur de Coahuila y noreste de Durango); 2) Agave nickelsiae (microendémica al sureste de Coahuila); y 3) Agave pintilla (la de distribución más occidental del grupo, sureste de Durango). En este trabajo se describe Agave pintilla como entidad nueva, se reinstala A. nickelsiae como nombre correcto de una de las especies y se presentan descripciones enmendadas de A. victoriae-reginae subsp. victoriae-reginae, A. victoriae-reginae subsp. swobodae y A. nickelsiae, así como claves para distinguir entre taxa. No se encontraron híbridos naturales entre los miembros del complejo A. victoriae-reginae pero se registran tres con otras especies: Agave nickelsiae x A. asperrima, A. nickelsiae x A. lechuguilla, y A. pintilla x A. salmiana subsp. crassispina.