An annotated checklist of the genus Tristagma (Amaryllidaceae, Allioideae)

ARROYO-LEUENBERGUER, S.; SASSONE, A.B.

Phytotaxa

Magnolia Press

Lugar: Auckland; Año: 2016 vol. 277 p. 21 - 35

1179-3155

Tristagma is a South American genus distributed in Argentina and Chile. Species circumscription in Tristagma has been asource of confusion for various reasons; e.g., generic concepts, nomenclatural inconsistencies, and doubtful species. As afirst step towards a revision of Tristagma, the nomenclatural history is reviewed. Following an extensive review of specimensin various American and European herbaria, a generic description and a list of names and their types are here provided.Thirteen names are lectotypified, seven are synonymized, three holotypes are identified for the first time, one neotype is designated,a new combination is made, and 12 species are recognized: T. ameghinoi, T. anemophilum, T. berteroi, T. bivalve, T.circinatum, T. gracile, T. graminifolium, T. nivale, T. patagonicum, T. poeppigianum, T. porrifolium, and T. violaceum. A newrecord of the flora of Chile: T. circinatum is also reported. Additionally, five doubtful species are mentioned and three areexcluded from Tristagma. Another five species names referred in the literature to Tristagma have already been transferred toother genera. We also provide conservation assessments, distribution maps and an identification key to species.