|
''Cycas angulata'' is a species of cycad in the genus ''Cycas'', native to Australia in northeast Northern Territory (lower reaches of the Foelsche, Robinson and Wearyan Rivers near Borroloola) and northwest Queensland (Bountiful Islands). It is the largest Australian ''Cycas'' species, with arborescent and frequently branched stems growing to 5 m (rarely 12 m) tall, and 15–25 cm in diameter. Older specimens lose the leaf base scars and gain a more checkerboard appearance. The leaves are 1.1-1.7 m long, pinnate with 180-320 leaflets, the leaflets 14–23 cm long and 4.5-6.5 mm wide, grey-green to glaucous; there are to 40 leaves in the crown. The leaf petioles are armed with spines in younger individuals (a few millimetres long) with this trait being lost in older individuals. The female cones are open type sporophylls 25–50 cm long, brown, each with 6-12 ovules each. The lamina is triangular ending in a sharp narrow spine. The male cones are solitary, erect, 20–25 cm long and 12–15 cm diameter. The name derives from the Latin angulatus, which translates as "angular", referring to the leaflet arrangement on the leaf petiole. ==Cultivation== It is occasionally grown as an ornamental plant; seeds are presently available for buyers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cycas angulata」の詳細全文を読む スポンサード リンク
|