Green Culture Singapore
Feature Article for August 2006
 
     
 
Online on 29 August 2006
 
     
 
Text by
Nancy Robitaille
 
 
Edited by
Wilson Wong & Lynnette Terh
 
 
Pictures from
Dale Martens, Ron Myhr, Christina Kennås & Lena Klintberg
 

 

INTRODUCTION

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)

 


 

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)

 

Alsobia in a NUTSHELL

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.

 

ALSOBIA SPECIES

Alsobia has three species:

Alsobia dianthiflora

 

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).


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).

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.

 

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).

 

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.

 

Alsobia 'Iris August'

Alsobia 'Iris August' has white-fringed flowers with purple spots.

Left: Alsobia 'Iris August' (Christina Kennås)

 

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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