Keywords
endemism
anatomy
seeds dispersion
pedicel
peduncle
How to Cite
Abstract
Tagetes moorei var. breviligulata (Asteraceae-Tageteae) is an endemic species from Queretaro, Mexico. This species is found in some semiarid areas and grows on calcareous soils. Biological and ecological background of this species is scarce. This paper describes some aspects of the plant morphology of T. moorei, particularly at the flower head level, related to a special mechanism for seed dispersal classified as autochore-antitelechore. In this mechanism, the achenes formed in the involucre do not fall directly to the ground during dehydration and flower head drying, as with most Tagetes species. In this case, flower pedicel is collapsed and separates from the involucre; then achenes slid inside the peduncle. This seed dispersal mechanism in semiarid environments is uncommon for Asteraceae.
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