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Green
Culture Singapore
Feature
Article for August 2006
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Online
on 29 August 2006
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Text by
Nancy Robitaille
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Edited
by
Wilson Wong & Lynnette Terh
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Pictures
from
Dale Martens, Ron Myhr, Christina Kennås & Lena Klintberg
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INTRODUCTION
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Alsobia
is a rather new genus in the plant world. In 1978, two Episcia
species, namely, E. dianthiflora and E. punctata
were reclassified under this new genus. Most, but not all
botanists, have recognised these two species in their new
genus. Little information, however, can be found for plants
belonging to the genus Alsobia. Most of the literature
written on gesneriads, published during the 1950s to 1970s,
still has these two Alsobia species included in the
Episcia genus. So it is up to growers, researchers
and writers to ferret out information about this exotic plant
genus.
Right:
The habit of the Alsobia plant. Shown here is Alsobia
dianthiflora. (Dale Martens)
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Alsobia,
commonly called 'lace flower vine' and Episcia are
two closely related genera of plants. Both produce stolons
and have a fiberous root system. However, the flowers of the
Alsobia flowers are different from those of the Episcia,
in both form and colour. So far, only one colour dominates
the scene of Alsobia, that is, white. Alsobia
species mostly have white-fringed flowers whereas Episcia
flowers have many colors but are not fringed. One Alsobia
species has purple dots in the throat extending onto the lobes
of the flower. When these two species were hybridised, the
plantlets produced have flowers that are mostly white with
purple dots. The leaves of the Alsobia are also different
from those found in Episcia.
Left:
The frilled edges of an Alsobia flower. Shown here
is Alsobia punctata.
(Dale Martens)
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Alsobia
in a NUTSHELL
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Easy
to Grow. Very tolerant of neglect. Great for the novice.
Pronouncation:
"Al-SO-bia".
Common
Name: Lace flower vine
Habit:
Basket plant, 6 to 12 inches, produces stolons.
Description
of flowers: White and tubular, most often with filaments and
spotted.
Original
location: Costa Rica to Mexico, Peru and Brazil.
Type
of Root: Fibrous.
Propagation:
Cuttings, seed & stolons.
Temperature:
16 degrees Celsius and higher.
Light:
Sun to partial shade.
Fertiliser:
As with Episcia, at every watering.
Special
Notes: Formerly classified under the genus Episcia.
More cold tolerant than Episcia.
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ALSOBIA
SPECIES
Alsobia
has three species:
Alsobia
dianthiflora
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Alsobia
dianthiflora has small leaves and is a compact plant.
Flowers are white and have frilled edges indicated as fimbriated.
This species is very highly recommended for both novices and
more experienced growers as it is an extremely vigorous grower.
Web
pictures of Alsobia
dianthiflora:
Picture 1
& Picture 2.
Alsobia
dianthiflora 'Costa Rica' has greenish white fimbriate
flowers with lobes folded back. It has heavy bearding on lower
lobes.
Web
picture of Alsobia
dianthiflora
'Costa
Rica':
Picture 1.
Left:
Alsobia dianthiflora (Lena Klintberg).
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Alsobia
punctata
Alsobia
punctata is larger than A. dianthiflora and has
large frilled flowers that are white and spotted with purple.
Web
pictures of Alsobia
punctata:
Picture 1
& Picture
2.
Right:
Alsobia punctata
(Lena Klintberg).
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Alsobia
sp.nov.aff. punctata
Alsobia
sp.nov.aff. punctata (USBRG 1994-005). This new species was
found in Chiapas, Mexico and is sometimes referred to as A.
'Chiapas'. It has not yet been given a specific name. It is similar
to A. punctata. This has white flowers that are fimbrate
with purple spots on lobes. Flower lobes fold back onto the flower.
Since A. 'Chiapas' does not give stolons, this plant may
also find itself in yet another genus one day.
Web
pictures of Alsobia
sp.nov.aff.
punctata:
Picture 1 &
Picture 2.
ALSOBIA
HYRBIDS
Hybrids
of A. dianthiflora and punctata exhibit white fimbriated
flowers with purple spots in the throat and on the lobes.
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Alsobia
'Cygnet'
The
most popular hybrid is A. 'Cygnet'. Alsobia
'Cygnet' was produced by crossing A. dianthiflora with
A. punctata at Cornell University in 1967. This hybrid
has purple spots on lobes and the interior of the flower.
It is larger than A. dianthiflora, which is one of
its parents. This plant has two-inch long scalloped rhombic
leaves with two-inch petioles and is a much freer bloomer
and is considered a truly everblooming gesneriad.
Left:
Alsobia 'Cygnet'
(Ron
Myhr).
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Alsobia
'San Miguel'
Alsobia
'San Miguel' (A. 'Cygnet' x self) has frilled white flowers
with purple spots. It is larger but slower growing.
Web
picture of Alsobia
'San
Miguel':
Picture 1.
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Alsobia
'Iris August'
Alsobia
'Iris August' has white-fringed flowers with purple spots.
Left:
Alsobia 'Iris
August'
(Christina
Kennås)
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CARE
OF ALSOBIA
Alsobia
can be grown in the same way as most Episcia and their need for
humidity is roughly similar. Alsobia is usually more tolerant
of neglect than Episcia. Alsobia can grows best in dappled sun/shade. They also appreciate
feeding at a diluted rate at every watering. Alsobia can
be propagated by means of stolons, leaf-cuttings or seeds. A friable
soil used for African violets is adequate for this plant.
ACKNOWLEDEGEMENTS
Green Culture Singapore would like to thank Nancy for sharing this
wonderful and informative article with the gardening community in
Singapore. We are also grateful to Dale Martens, Ron Myhr (The
Gesneriad Reference Web), Christina Kennås and Lena Klintberg
(Gesneriasterna) for
granting us their kind permission to reproduce their Alsobia pictures on this article.

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