Hypochaeris

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 : 1027

Genus Hypochaeris L.

Hypochaeris neopinnatifida C.F. Azevedo-Gonçalves

& Matzenbacher

Figure 36

Hypochaeris neopinnatifida C.F. Azevedo-Gonçalves & Matzenbacher (2006) : 158 — Flora Argentina (2017); Tropicos (2017).

Hypochaeris rosengurttii Cabr. var. pinnatifida (Speg.) Cabrera (1941) : 393 — Cabrera (1963): 397.

Hypochaeris variegata (Lam.) Baker var. pinnatifida Spegazzini (1896) : 40.

Hieracium variegatum Lamark (1786) : 362.

Cryptophytes; native with wide distribution in the Southern Cone Region of South America. Vulnerable, reasons unknown ( Delucchi 2006).

Characteristics. Perennial herb, with latex, rhizomes and simple or bifurcated erect stems, 10–40 cm tall. Leaves arrange in a basal rosette, with oblanceolate shape, lobate to pinnatisect margin, attenuate base and acute apex. Inflorescence: solitary discoid capitulums with yellow florets. Achenes with a short thick beak, ca 0.5 mm in diameter, crowned by a pappus with 1-series plumose hairs.

Comments. This is an infrequent species in the study area. It grows in full sunlight conditions in shallow soils at the summit. Hypochaeris neopinnatifida and H. pampasica Cabrera differ from the other Hypochaeris species in Buenos Aires province by having achenes with beaks that are shorter than the seminiferous portion, and a 1-series pappus hair disposition. Particularly, H. pampasica has a thinner beak than H. neopinnatifida .