Biology Reference
In-Depth Information
F
x 10
E
x 5
D
x 5
C
x 10
B
x 9
A
x ½
M.T.C.
—
Hybanthus parviflorus
(Mut.) Baill.: A, planta en flor; B, flor; C, pé-
talo inferior; D, fruto; E, sección del fruto; F, semilla.
Fig. 13.1.
Hybanthus parviflorus
(Cabrera, 1965).
parviflorus
(Mutis ex L.f.) Baill. var.
latifolius
(Eichler) Hassl.,
Hybanthus parviflorus
(Mutis
ex L.f.) Baill. var.
typicus
Hassl. Published with
an invalid name:
Ionidium glutinosum
Vent.,
Ionidium parviflorum
(Mutis ex L.f.) Vent.,
Viola parviflora
Mutis ex L.f. (Zuloaga and
Morrone, 1999).
H. parviflorus
is a minor shrub that
grows at 0-1000 m above sea level. It is an
annual branchy erect plant no more than
50 cm high. This plant has opposite leaves
that are shortly peciolated and serrated. It has
pubescent stems and small solitary flowers
that are white in colour, sometimes having a
purple shade, located in the axil of the upper
leaves. The fruit is a globular capsule (Cabrera,
1965). This plant blossoms and fructifies in
autumn: April, May (Marzocca, 1997).
In Argentina,
H. parviflorus
grows in the
provinces of Buenos Aires, Catamarca, Chaco,
Córdoba, Corrientes, Entre Ríos, Formosa,
Jujuy, La Pampa, La Rioja, Misiones, Río
Negro, Salta, Santa Fe, San Luis and Tucumán.
It is also found in the neighbouring countries
of Bolivia, Brazil, Chile, Paraguay and
Uruguay (Zuloaga and Morrone, 1999).
H. parviflorus
is a species that has adapted to
grow in undisturbed soils. It is a weed of
annual crops and is mainly found in fallows
and in soybean fields under direct sowing.
It also grows in stubble, wastelands, on walls
and in rubble (Marzocca, 1997). Some spe-
cies that are considered to be weeds, such as
H. parviflorus
, that grow during the fallows
can make a significant contribution mainly
during the initial stages of the implementa-
tion of an agricultural system (Papa, 2000).
H. parviflorus
is a plant species that has
generated biotypes resistant to the herbi-
cides commonly employed for the control
of weeds in fallows and during the
cultivation cycle, such as glyphosphate and
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