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
.