Breve ricerchina e forse l'ho identificata: si dovrebbe trattare di
Begonia x hybrida 'Dragon Wing';
qui parlano di lei e dicono anche di chi è figlia:
"Dragon Wing Begonia is not a typical begonia. It's like a begonia on steroids! Its leaves and flowers are larger than most begonias, and its growth rate is phenomenal. It adapts well to landscape beds, containers or hanging baskets and blooms non-stop from spring until fall frost.
Soon after Dragon Wing Begonia was introduced by Pan American Seed Company in 2000, growers and landscapers from California to Florida were raving about the plant.
A hybrid cross between angel wing begonia and wax begonia, Dragon Wing Begonia offers the best qualities of both plants. It grows denser and larger than most angel wing types and has the heat tolerance of wax begonias.
Dragon Wing Begonias grow 12 to 15 inches tall and 15 to 18 inches wide. Leaves are wing-shaped and large, 2 to 5 inches long, and dark glossy green. Plants tend to branch readily and grow dense without pruning. Two flower colors, red and pink, are currently available. The flowers are borne on stalks called panicles, growing from the leaf nodes near the tip of each branch. Flowers shed naturally after bloom as new ones take their place, so plants appear neat and clean all summer.
In the landscape, Dragon Wing Begonia does best in filtered shade and well-drained soils enriched with organic matter. For best results, plant on a raised bed, 4 to 6 inches above the normal grade. To build up the bed, place 4 inches of compost or well-rotted animal manure on the planting area and incorporate it uniformly to a 12-inch depth. Then broadcast a slow-release fertilizer such as Osmocote over the bed according to label directions. Space plants 12 to 18 inches apart. Mulching and thoroughly watering are the final tasks to get the summer show underway.
Like other fibrous begonias, Dragon Wing Begonias are heavy feeders and will benefit from a liquid fertilizer such as 20-20-20 or 15-3-15 applied each two weeks during the growing season.
Dragon Wing Begonia makes a spectacular showing in the landscape when combined with tropical plants having bold foliage, such as bananas, cannas, gingers and tibouchinas (Princess Flower). With its gently arching stems and prolific, pendulous flower clusters, Dragon Wing Begonia also is an excellent choice for large containers.
A single plant will fill a 10-inch hanging basket, and five plants will fill a whisky barrel, so provide plenty of room for them to grow. When plants grow a little too large for their container, simply trim them back to encourage new growth and flowers.
When frost threatens, Dragon Wing Begonias can be cut back, dug and repotted for indoor culture and overwintering. Cuttings also can be rooted in water and potted. Give them plenty of bright light and occasional liquid feedings, and they will continue their award-winning performance indoors all winter."
Qui invece la definiscono
Begonia x argenteoguttata 'Dragon Wings' e dicono che fiorisce così tanto perché sterile: non fa semi dunque.