Plantago tandilensis (Pilg.) Rahn

Echeverría, María L., Alonso, Sara I. & Comparatore, Viviana M., 2017, Survey of the vascular plants of Sierra Chica, the untouched area of the Paititi Natural Reserve (southeastern Tandilia mountain range, Buenos Aires province, Argentina), Check List 13 (6), pp. 1003-1036 : 1031

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 .