| Whitebark Magnolia - Magnolia hypoleuca |
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Whitebark Magnolia is a deciduous tree growing to 25 meters in the wild. Leaves obovate, 20-45 cm long, 10-25 cm wide, light green and glabrous above, glaucous and slightly hairy beneath. Flowers cup-shaped, about 20 cm across, creamy-white, fragant, in May-June. Filaments and styles are crimson. Damaging Agents- Young magnolia are susceptible to fire-caused injury and mortality. Winter droughts can cause extensive dieback and mortality. A number of fungi, including species of Cladosporium, Colletotrichum, Glomerella, Phyllosticta, and Septoria cause leaf spots but these seldom result in any significant damage. A leaf spot caused by Mycosphaerella milleri can be a problem on nursery seedlings. A number of Fomes and Polyporus fungi can cause heartrot in southern magnolia. Heavy infestations of magnolia scale (Neolecanium cornuparyum) can kill branches or entire trees. Oleander pit scale (Asterolecanium pustulans) and tuliptree scale (Toumeyella liriodendri) attack and injure southern magnolia, but rarely cause mortality. |
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This is a flower of the Southern Magnolia, Magnolia grandiflora L.
The large, white, fragrant flowers are perfect (19) and appear from April to June. The fleshy conelike fruit matures from September through the late fall. When the fruit matures and opens, seeds 6 to 13 mm (0.25 to 0.5 in) long emerge and hang temporarily suspended by slender, silken threads before dropping. |
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Special Uses- Because of its showy flowers and lustrous evergreen foliage, southern magnolia is a valuable and extensively planted ornamental. In many urban areas where other species do poorly, this magnolia can grow because of its resistance to damage by sulfur dioxide. The seeds are eaten by squirrels, opossums, quail, and turkey. The leaves, fruits, bark and wood yield a variety of extracts with potential applications as pharmaceuticals. |
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