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Magnolia grandiflora, commonly known as the southern magnolia or bull bay, is a tree of the family Magnoliaceae native to the ... Around 50% of seeds can germinate, ...
The seeds are smooth, dark brown, measuring from 13 to 20 mm broad, 6,2 to 10,8 mm long and 3,1 and 4,2 mm tick. The seeds are covered by an aromatic reddish fleshy layer named sarcotesta. The moister content of fresh seeds is around 35,3%. 1’000 seeds weight from 108 to 125 grams and 1 kilogram can have from 8’000 to 9’260 seeds. [6]
Umbrella magnolias have large shiny leaves 30–50 cm long, spreading from stout stems.In a natural setting the umbrella magnolia can grow 15 m tall. The flowers are large, appear in the spring, malodorous, [5] 15–25 cm diameter, with six to nine creamy-white tepals and a large red style, which later develops into a red fruit (an aril) 10 cm long, containing several red seeds.
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The tree bears its fruit, which are aromatic, cone-like, aggregate infructescenses, about 4 cm in length, in July and August. There are approximately 25 fruits of dehiscing capsules per infructescense. The fruit's seeds are exserted, and covered with bright networks of arils which dangle from threads. Seed germination is epigean. [4]