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 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 .