Four new species of Tragia (Euphorbiaceae) from the Tehuantepec region of Mexico
DOI :
https://doi.org/10.17348/jbrit.v20.i1.1462Mots-clés :
Tragia, Mexican Euphorbiaceae, new species, Isthmus of TehuantepecRésumé
Four new species of Tragia sect. Tragia (Euphorbiaceae) are here described from the Mexican states adjoining the Isthmus of Tehuantepec. Tragia acahualicola Urtecho, sp. nov., has ovaries that are densely stipitate-glandular. This species is widely distributed throughout southern Mexico. Tragia catemacoensis Urtecho, sp. nov., has very distinctive pistillate and staminate flowers. It is limited in distribution to an area in Veracruz in the vicinity of Lake Catemaco. Tragia maculata Urtecho, sp. nov., is similar to T. nepetifolia var. setosa. It differs from this taxon in having a much less papillate stigma, wider, narrowly-triangular leaves, and prominent white spots on the seed. Tragia chiapensis J-B. Urtecho & Urtecho, sp. nov., is similar to Tragia affinis Rob. & Greenm. in leaf shape and in possessing more than three stamens per staminate flower. It differs from this species in stigma texture, uniform stamen number (6), and smaller seeds.
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