calderoniae Zamudio (2001)
studies of the flora and fauna of the biosphere reserve Sierra Gorda
located in the border area of the two Mexican states of
Potosí and Querétaro, a new butterwort species was found and described
by the Mexican botanist Sergio Zamudio, which he named P. calderoniae.
This species occurs in a very restricted area between 2200 and
2300 m a.s.l. Until today this species is only known from the
surrounding cliffs of the 2 plains Llano Chiquito and Llano
plants do occur in a tropical montane cloud forest
mesófilo de montaña). During the rainy season there is regular
rainfall, while during the dry season, there are very few
precipitations, so the plants get their humidity from the clouds and
fogs that do form in these mountain plains. P.
calderoniae grows on vertical calcareous cliffs, where the
plants can be found either in moss or in eroded rock material in
crevices. P. calderoniae
seems to divide easily, therefore often several plants grow together at
the same spot. In this higher mountain regions in winter also
frosts and snow do occur regularly, therefore the species needs to be
frost resistant to a certain degree.
is a tropical heterophyllous species. The winter rosette has an onion
like appearance and consists of up to 30 leaves. The winter
are succulent, up to 1,5 cm long, pointed and show a dark red
brown-red colour. Often the winter rosettes are growing below the
surface. In spring the plants form long lanceolate summer leaves. The
size is spectacular as they can reach up ton 25 cm in length. Depending
if the plants are exposed to direct sunlight or not, the leaf colour is
pure green or reddish. An indivudual plant does produce only 5 to 6
summer leaves. Then at the end of August the plants begin to form
winter leaves again.
flowering period is from June to mid of August. P.
does form 1 to 3 flowers per season that occur from
summer rosette. The flower is two-lipped and the colour of the corolla,
corolla tube and the spur is red-purple. Including the spur the
flower can reach a size of 3,5 cm. The corolla tube is, similar
crassifolia, funnel shaped and up to 1 cm long.
The spur is with its up tp 1,6 cm also pretty long for the genus Pinguicula.
a successful cultivation of P. calderoniae
a calcareous substrate does not seem to be mandatory, as my experiences
with vermiculite (that is normally pH neutral) is also very positive.
The use of more organic substrates is also possible, but then you
should be precautious that the substrate doesn't stay to wet, as this
may cause root rotting. In winter it is recommended to keep the plants
dry or only moist.