Solanum betaceum Cav. Icon. 6: 15, t. 524 (1800)
T: Spain, cultivated in Madrid 1798–1799, Cavanilles s.n.; lecto: MA308535 fide Bohs (1994). An image of the type in MA can be seen on the Solanaceae Source site.
Cyphomandra betacea (Cav.) Sendtner, Flora 28: 172; t. 4, figs 1–6 (1845).
The genus Cyphomandra was separated from Solanum on the basis of few technical characters such as the thickening of the connective at the back of the anther. This separation from Solanum has long been questioned. Recent sequencing of DNA places Cyphomandra species clearly with Solanum.
A recent monograph on this group of species as Cyphomandra may be found in L. Bohs Cyphomandra (Solanaceae), Flora Neotropica, Monograph 63 New York Bot. Gard. (1994) 1–176 and their transfer to Solanum in L. Bohs, Taxon, 44 (1995) 583–587.
Small malodorous tree, pubescent with simple glandular hairs.
Leaves ovate, cordate at base with the lobes overlapping; lamina of the lower and juvenile ones to 35 cm long, 30 cm wide, others commonly c. 15 cm long, 12 cm wide, entire; petiole 5–15 cm long.
Inflorescence pendulous, cyme-like; pedicels 10–20 mm long. Calyx c. 5 mm long, the lobes broad, rounded. Corolla c. 20 mm diam., pink, fleshy, scented. Filaments c. 2 mm long; anthers 4–5 mm long, the connective broad and thick. Ovary bluntly conical; style 5–6 mm long, stout.
Berry ovoid, 5–7 cm long, dark red, dull. Seeds disc-shaped, 3.5–4 mm diam. with wing 0.25 mm wide, pale reddish-brown.
Distribution and ecology
Native to South America. Infrequent escape from cultivation in subtropical areas of eastern Qld and north-eastern N.S.W.
Occurs in rainforest.
Tree Tomato, Tamarillo.
Solanum betaceum belongs to the Cyphomandra clade of Solanum - see Solanaceae Source.
Cultivated for its edible fruit in many parts of tropical America, Asia, New Zealand, the Pacific region and Australia. Garden-grown in all Australian States with commercial plantings in subtropical areas.
Cultivation discussed by J. McD. Slack, Growing tamarillos (Cyphomandra betacea). Agric. Gaz. New South Wales 86: 2–4 (1976).
From the web
An image of S. betaceum can be seen on the Eurobodalla Shire site and also on the Bean interactive key site at http://delta-intkey.com/solanum/images/sol_bet_klove.jpg
A photograph of this species by Hugh & Nan Nicholson can be seen on the Terania Rainforest Publishing Photo Library site.
A page on Solanum betacea as a threat in the Pacific can be found on the Pacific Island Ecosystems at Risk (PIER) at www.hear.org/pier/species/solanum_betaceum.htm
Further information and links for this species can be found on the Solanaceae Source site.
Information on pollination and fruit set (floral biology) of tamarillo in New Zealand can be found in Lewis & Considine (1999) New Zealand J. Crop & Hort. Science 27: 101-112, downloadable as a pdf at http://www.rsnz.org/publish/nzjchs/1999/13.pdf