Sinningia nordestina x araneosa

  1. History
  2. Flower count
  3. Habit
  4. Leaves
  5. Table comparing hybrid with both parents
  6. Future prospects
  7. Update: 2009
  8. Feature table

History

I put S. araneosa pollen onto S. nordestina late in 2006, and got one fruit.  I sowed the seed in January 2007 and got one seedling.  For a time, I was uncertain whether it was an actual cross, or another S. nordestina (which would have been okay).

In September 2007, it bloomed.

The flowers clearly have S. nordestina in their background, since they have speckles derived from that species.  They are equally clearly not S. nordestina, since that species has speckles on the outside of the tube, while this plant has speckles only on the inside, the outside being solid red (like S. araneosa).



Flower count

The hybrid (so far) has only one (occasionally two) flowers per axil.  S. nordestina also has one, while S. araneosa (in my culture) can have up to four flowers per axil.  One can hope that the hybrid will eventually have more flowers.

One can also be disappointed.  As I write this in November 2008, the plant is blooming on two flowerstalks, but with exactly one flower per axil.

The flowerstalk on the right in the picture has a second flowerbud from each of the two axils at the node just below the flower which has flopped over backward.

Habit

Neither S. araneosa nor S. nordestina has a robust stem, although araneosa's is a little stronger.  The hybrid is fairly sturdy, although as the flowerstalk elongates, it tends to bend sideways.

Leaves

The leaves of the two parents are similar, so it is not surprising that the cross has the same sort of leaves: hairy, light green, flexible, and relatively short.  The picture above shows that the hybrid is susceptible to the same problem as S. araneosa: mildew.  So far S. nordestina has exhibited no mildew symptoms, but I won't be surprised if it eventually does.

Comparison table

Attribute S. nordestina S. araneosa S. nordestina x araneosa
Flower color Red
Flower shape Conical tube, widening toward corolla lobes Tubular, upper two lobes extended
Speckles Inside and outside of tube None Inside tube only
Flower size 2-3 cm 4 cm 3-4 cm
Flowers per axil 1 1-4 1 usually
Inflorescence type Extended axis
Tuber Small (ca. 1 cm diameter) Fullsize (see picture) No obvious tuber the last time I checked, although the plant went dormant and then revived, so there must be something.



Future Prospects

Both parents are members of the corytholoma clade, so there is a reasonably good chance that the hybrid is fertile.  The objectives in continued breeding would be to get the speckling on the outside of the tube, where it is more visible and dramatic, and to increase the number of flowers per axil.  The first trait would have to come from S. nordestina, and the second from S. araneosa.  This suggests crossing the F1 onto itself, rather than back-crossing it to either of its parents.

Update: 2009

After going dormant in late 2008, the plant just sat in the pot.  As far as I could tell, it was dead.  I put the pot in the Tuber Dormitory, then transferred it to the Tuber Morgue.  Time went by.

On 23 July 2009, I noticed a small green shoot.  Almost the end of July!  What are these plants thinking???

What kind of growth and flowering we get this season remains to be determined.




Feature table for Sinningia nordestina x araneosa

Plant Description

Growth Indeterminate, like S. nordestina
Habit Stem upright like S. nordstina, but sturdier and not as tall.
Leaves Light green, hairy, and slightly sticky, like both parents.
Dormancy Like S. nordestina.

Flowering

Inflorescence Axillary cymes, usually with just 1 flower. The flowering axis has very small leaves.
Season Blooms in (late) autumn, like S. nordestina.
Flower Red, tubular, with yellow throat and red speckles inside.

Horticultural aspects

From seed 9 months to first flowering.
Hardiness Very unlikely to be cold-tolerant.
Recommended? I like the flowers, but there is this mildew problem.  I hope it's fertile, so I can work on improving it.

Hybridization

Hybridizer Alan LaVergne
Fertility Not yet known.

Botany

Taxonomic group Both parents are members of the Corytholoma clade.