Tristagma graminifolium (Phil.) Ravenna (1978: 133)

Arroyo-Leuenberger, Silvia C. & Sassone, Agostina B., 2016, An annotated checklist of the genus Tristagma (Amaryllidaceae, Allioideae), Phytotaxa 277 (1), pp. 21-35 : 29

7. Tristagma graminifolium (Phil.) Ravenna (1978: 133)

Bas.: Steinmannia graminifolia Philippi (1884: 64) ≡ Garaventia graminifolia (Phil.) Looser (1944: 79) ≡ Nothoscordum graminifolium (Phil.) Traub (1968: 49) . Type (lectotype, designated here):— CHILE. Cerro Renca, 1883/8, F. Philippi s.n. (SGO 000001119!; isolectotype: SGO 000001120!).

Notes: — First Traub (1968) treated this species under Nothoscordum , and then Guaglianone (1972) placed it as a doubtful species of Nothoscordum . However, as stated by Ravenna (1978), Tristagma graminifolium has fused tepals forming a tube and the base chromosome number is 2n = 2x = 8 (metacentric chromosomes), as in the rest of the studied species of Tristagma , whereas in Nothoscordum the basic chromosome number is x = 5 (3 metacentric + 2 acrocentric chromosome pairs) or x = 4 (3 metacentric + 1 acrocentric chromosome pairs) ( Crosa 1981). In a preliminary phylogenetic study of Tristagma , this species also resolved as part of Tristagma (A.B. Sassone, L.M. Giussani in prep.).

Conservation status: — Endangered (EN), under criterion B1ab(iii) ([a: severely fragmented or Number of locations; b(iii): continuing decline observed of the area, extent and/or quality of habitat)]. The species was found in five hills near Santiago, that are severely fragmented with disturbed vegetation affected by human activity ( Fig. 2A ). Following the proposal made by the Ministerio de Ambiente de Chile this species is considered Vulnerable (VU, http:// www.mma.gob.cl/clasificacionespecies/fichas8proceso/fichas_finales/ Tristagma_graminifolium _P08_propuesta. pdf.). According to Ravenna et al. (1998), this species also occurs in Valparaiso, for which we do not have records. However, the conservation status proposal includes a photo of a plant which is misidentified—the plant is part of a herbarium sheet of T. graminifolium (Grandjot 146276, CONC!).

Figures

FIGURE 2. Area of distribution of: A, T. graminifolium. B, T. nivale. C, T. patagonicum. D, T. porrifolium. E, T. violaceum.