Siam Villa Garden: มะเฟือง

Averrhoa carambola is a small, slow-growing evergreen tree with a short-trunk or a shrub. The branches are drooping and the wood is white and turns reddish. It has a bushy shape with many branches producing a broad, rounded crown. The compound leaves are soft, medium-green, they are spirally arranged around the branches in an alternate fashion. The pinnate leaves have a single terminal leaflet and 5 to 11 nearly opposite leaflets, each leaf is 15–20 cm long, and the 3.8–9 cm long leaflets are ovate or ovate-oblong in shape. The top sides of the leaves are smooth and the undersides are finely hairy and whitish. The leaflets are reactive to light and tend to fold together at night, they are also sensitive to abrupt shock and when shaken tend to close up also. The lilac or purple-streaked, downy, flowers are produced in the axils of leaves at the end of twigs. The flowers are arranged in small clusters on the ends of the branches or sometimes on the larger stems and trunk, each cluster is attached to the tree with red stalks. The bell-shaped, perfect flowers, are produced in loose panicles that are much-branched with pedicellate flowers; each flower is around 6 mm wide, with 5 petals that have recurved ends. The fruits are showy with an oblong shape: they are longitudinally 5- to 6-angled and 6.35–15 cm long and up to 9 cm wide. The fruits have a thin, waxy skin that is orange-yellow colored. The juicy fruits are yellow inside when ripe and have a crisp texture and when cut in cross-section are star-shaped. The fruits have an oxalic acid odor, which varies between plants from strong to mild, the taste also varies from very sour to mildly sweetish. Each fruit may have up to twelve 6–12.5 mm long seeds, which are flat, thin and brown. Some cultivated forms produce fruits with no seeds. Averrhoa carambola has a number of different forms differing in fruit taste, texture, and shape, some are very acidic and others are sweet. The plant is grown in Malaysia and Taiwan, with smaller concentrations in Thailand, Israel, The United States, Brazil, Philippines, China, Australia, Indonesia and the warmer parts of India and other areas of the world with the same climate. It has become a commercial crop in many of these locations, grown for its edible fruits. The flowers need cross-pollination to produce fruit, thus seed raised plants are variable. Plants may flower and bear fruit in about a year after seed germination. Larger plants may bloom year-round in tropical areas as long as environmental conditions are suitable, plants may have flowers, unripe and ripe fruit at the same time. Under other climate and environmental conditions, plants tend to bloom in spring, and then off and on again during the rest of the year. Many different cultivars are grown, most are selected to optimize fruit flavor and maximum fruit production for specific growing areas, with each country or region having their own specific selections. Medicinal Use Medicinally, the fruit acts as a laxative and is used in traditional medicine against fever, skin disorders, high blood pressure, and diabetes. The leaves, on the other hand, are used as relief from rheumatism; the flowers against coughs, and the seed against asthma, colic, and jaundice. Carambola has other various uses such as stain remover and brass polish (fruit juice), dye (unripe fruits), and construction materials (wood).