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Utricularia juncea, the Southern Bladderwort is
distributed through North America, Belize, Trinidad,
North Brazil, Columbia, Venezuela and Guyane. It is a
terrestrial of temperate climats. A prolific terrestrial
Bladderwort which spreads rapidly.
Utricularia Juncea blooms on floating carpets of
vegetation. The flowers are small and yellow. The flowers
are self-fertile and apparently are usually, if not
always, self-pollinated. Utricularia juncea has a short
purplish flower stalk. Produces a moss-like mat of bright
green leaves less than 4 mm long.
The bladder-trap is unique to the Utricularia, giving
them their nickname of Bladderwort. Utricularia has no
true root system. They form creeping or floating, thin,
hair-like stems that extended away from the main body of
the plant. The bladder-traps are held on these stems. The
traps are underground and are too small to hand feed. So,
it has to catch it's own microscopic prey. Thin, filament-like
hairs protrude from the trap door. These serve as guides
to send the prey toward the door. These plants use low
pressure inside the chamber vs. high pressure outside.
When a bug activates the hairs, the door opens quickly,
forcing the victim into the low-pressure digestion area.
The water is pumped out and the mulcilage seal is re-established.
The plant now secrets digestive juices to break down the
captured prey and absorb the mineral rich fluid. Trapping
usually occurs within 1/50 of a second. It is believed
that glands found around the closed entry may also
secrete an attractant that may aid in luring prey.
Hardiness zone 10, (1°C/35°F) in Winter. Utricularia
juncea favour sunny locations in permanently wet open
ground. In captivity, they grow well in pure sphagnum
moss as well as in a standard 1:1 peat moss/sand mix.
Like other carnivorous plants, they do require pure water
and can be killed by fertilizer in the soil. In nature,
water levels are usually near or even a little above the
soil surface. Utricularia prefer frequent overhead
watering, at least once a day in Summer, and once every
few days in Winter.
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