Survey of the vascular plants of Sierra Chica, the untouched area of the Paititi Natural Reserve (southeastern Tandilia mountain range, Buenos Aires province, Argentina) Author Echeverría, María L. Author Alonso, Sara I. Author Comparatore, Viviana M. text Check List 2017 2017-12-15 13 6 1003 1036 http://dx.doi.org/10.15560/13.6.1003 journal article 10.15560/13.6.1003 1809-127X Plantago tandilensis (Pilg.) Rahn Figure 46 Plantago tandilensis (Pilg.) Rahn (1983) : 337 — Flora Argentina (2017) ; Tropicos (2017) . Plantago brasiliensis Sims var. tandilensis Pilger (1928) : 64 — Cabrera (1965b) : 338 . Plantago brasiliensis Sims (1825) : 2616 . Chamaephytes; endemic. Vulnerable, reasons unknown ( Delucchi 2006 ). Characteristics. Shrub with numerous ascendant branches, 20–50 cm tall. Leaves: glabrous or slightly pubescent, with linear shape, 3–5 veins and sheathed base; 8–20 cm long and 1–3 mm wide. Inflorescences: cylindrical dense spikes, 1–5 cm long; peduncles longer than the leaves; flowers with free sepals. Fruit: a capsule with 2 seeds. Comments : This is a rare species in the study area. It grows in full sunlight conditions in cracks on the summit. Plantago bismarckii Nederlein , a species endemic to the Ventania mountain range, has sericeous-tomentose leaves and a smaller spike than P. tandilensis .