Hybrid of Hardy Tamarillo’s (Cyphomandra corymbiflora x fragrans) - part 2

On March 2019 I described my experiment with crossing of two half-hardy tamarillo species: Hardy Tamarillo Cyphomandra corymbiflora (female parent) and male Guava Tamarillo C. fragrans = C. diploconos (male parent). Now one of my hybrid plants is in flowers, so I am posting the new photos and description of an appearance of the hybrid (in table - comparison with the parents).

There is a table with comparison on various features of parents and the hybrid:

Features	hardy tamarillo (Cyphomandra corymbiflora)	hybrid F1 (Cyphomandra corymbiflora x fragrans)	guava tamarillo (Cyphomandra fragrans)
Leaf shiness	not shiny, mat	shiny	very shiny
Juvenile leaves lobation, size and color	entire, large, dark green	3(5) lobed (shallowly), very huge, dark green	5 lobed (deeply), medium-large, bright green
Mature leaf size and colour	large, dark green	medium-large, light-bright green	medium, light- bright green
Leaves thicknes	leathery, thin	leathery, rather thin	thick, waxy, rigid
Leaves hairless	glabrescent	almost glabrous	glabrous
Leaves longevity	deciduous	?	half-evergreen
Trunk base thickness	not thick, slender	not very thick, rather slender	very thick, conical
Time from sowing of seeds to blooming (in my experience)	about 1 year	about 0,5 year	8 years
Blooming time (at my northern 50° latitude)	from June	from July	from August
Size of plant when has first flowers	about 0,5-1m (= 2-3ft)	about 1m (= 3ft)	about 2m (= 7ft)
Type of inflorescence	dichotomous corymb-like	scorpioid raceme (rarely dichotomous)	scorpioid raceme (often dichotomous)
Young corolla color and shape	purple,stellate	purple, campanulate-stellate, irregulary opened	purple, funelliform
Older corolla color and shape	lavender-white, stellate	pale lavender, (camanulate-)stellate with a little twisted petals	yellowish, funelliform
Anthers color	yellow	yellow-purplish	purple
Stigma appearance	small, inconspicious	wide, capitate, large	wide, capitate, very large
Fruit appearance	pale green, dark green stipped, hairy	?	yellow, glabrescent
Fruit taste and skin texture	gentle aromatic, mild, tasty raw, skin soft	?	very aromatic, acidous, good for preserves, skin very strong
Frost hardiness	(-8)-(-10) C degree (= 14-17 F degree)	?	- 3 C degree (= 26 F degree)
Drought resistance	rather small	small	very resistant

..and the photos:

The most (about 7 for 10 ones in my experience) of seedlings were chlorotic, not deloped well and died fastly

But some seedlings was healthy and green

Young plants

The hybrid had lobed juvenile leaves (as male parent)

Juvenile leaves were usually 3-lobed and huge size

Hybrid plant started to blooming after a few months from seed (about half year old)

It started to blooming in July, so it blooms later than female parent (C. corymbiflora) and faster than male one (C. fragrans)

The stem was interesting maculated

.. and the trunk slender like on female parent, not swolen much

The flower in first day (purple petals)

... and in the second day (pale lavender)

I am trying to make backrosses with C. corymbiflora, because according prof. Lynn Bohs they are viable. In the future I am going to make pollination hybrid flower by pollen of other the hybrid (to obtain F2 hybrids) but now it is impossible because I have only on flowering hybrid plant (it is said to be self-incompatible as parents)