colimensis McVaugh & Mickel (1963)
of the most beautiful species
within the genus Pinguicula grows in Mexico and was
described in 1963 for the first time by the 2 American botanists
McVaugh und Mickel. Even collected many times before, plants of this
species were considered as being P. macrophylla
or P. moranensis.
P. colimensis is found south of the city of
Colima and seems to be restricted to that small area.
all known Mexican butterwort
species P. colimensis occurs on the lowest altitude
(between 350 and 450 m a.s.l.). The plants grow on north facing,
semi-shady or shady, vertical gypsum cliffs. The predominant vegetation
type there is the " bosque tropical caudifolia", a tropical forest,
where the trees and shrubs lose their leaves during the dry season in
winter/spring and form new leaves when the rainy season begins. The
typical species of that forest are Hechtia laevis, Selaginella
lepidophylla, ferns (Cheilanthes sp., Bommeria
sp.) and sporadically also cacti.
The difference to all othe species belonging to the section Orcheosanthusis
obvious when the summer leaves are regarded, because the margins of
the leaves are slightly downturned. The summer rosette consists of up
to 10 pale green leaves, being elliptic to obovate and up to 12 cm
long. Spectacular are also the glands on the upper side of the leaves.
They count amongst the largest glands within Pinguicula
of the winter rosette are spatulate and about 2 cm long and
2 to 5 mm wide, forming a compact rosette. The winter
rosette can easily consist of 70 to 130 leaves. In comparison to P.
macrophylla the rosette is not "onion like", because the
outermost leaves of P. colimensis do not cover all
other leaves. The size of the winter rosette can reach a size of 2 to
3.5 cm in diameter. Also typical for the winter rosette of P.
colimensis are the long white hair of leaves, cocoon like,
keeping the rosette together.
corolla is divided
into two lips and the colour is of an intensive pink, if exposed to
direct sunlight the flower shows a metallic aspect. The flower fits
into section Orcheosanthus (like P.
moranensis), having a very short tube and a very long spur.
The upper lip consists of two obovate lobes, which are often half of
size compared to the 3 lobes of the lower lip. In total the size of the
corolla measures about 3.5 cm in diameter. The spur can reach up to 4
cm. During one season up to 5 flower scapes can appear, occuring
together with or before the first summer leaves in May.
Cultivation of P. colimensis
is not to easy. In winter substrate should be kept almost dry, so that
the winter leaves do not begin to rot, because the winter rosette is
partly buried in the soil. In spring it is recommended to begin with
relatively few dosages of water, so that the soil is getting only damp.
With the appearance of the first summer leaves, substrate can be kept
wet during summer. As substrate I use a mix of calcareous loam and fine