Sinningia 'Peninsula Belle' x piresiana



Sinningia PB x piresiana

The best of this cross so far.


  1. History
  2. Genetics
  3. Feature table

This picture shows a comparison of the flowers of S. piresiana and two of its hybrid progeny.  The seed parent of the hybrids was S. 'Peninsula Belle' (S. lineata x reitzii).  The S. piresiana flower is at the top.

History

The hybrid seed was sown in January 2007, and both plants bloomed for the first time in May 2007, at the same time as S. piresiana (S. 'Peninsula Belle' is a summer/autumn bloomer).

The middle flower has the most red, perhaps a legacy of S. reitzii.  It also has another desirable characteristic: four flowers per axil.  The other hybrid plant has only 1-2 flowers per axil.  However, these are young plants blooming for the first time, so I can hope the flower count will improve with maturity.

Sinningia PB x piresiana
Sinningia PB x piresiana

Genetics

One nice trait that both hybrids inherited from S. piresiana is the dark markings on the outside of the corolla.  This makes a blooming S. piresiana attractive from many angles, and applies to the hybrids as well.

Also noteworthy is the indeterminate habit.  The hybrid background is 3/4 determinate (1/2 piresiana and 1/4 lineata, which are both determinate).  Even so, the 1/4 reitzii (indeterminate) outweighs the other 3/4.  This suggests that determinate growth in sinningias requires the cooperation of several genes.

Similarly, S. (leopoldii x "Black Hill") x douglasii has indeterminate growth, even though only the "Black Hill" quarter exhibits the indeterminate trait.



Feature table for Sinningia 'Peninsula Belle' x piresiana

Plant Description

Growth Indeterminate.  Of the three species in its ancestry, only S. reitzii has indeterminate growth.
Habit Upright stem
Leaves Dark green.
Dormancy Normal tuber, fast-growing.

Flowering

Inflorescence axillary cymes, no peduncles.  Of the three species in its ancestry, only S. reitzii has axillary cymes.  Of the three species in its ancestry, only S. piresiana lacks peduncles.
Season Summer
Flower Pinkish-purple, with purple streaks inside and out, tubular.

Hybridization

Hybridizer Alan LaVergne
Fertility This hybrid is fertile.  I have done crosses with it.