形態特徵：喬木，高8米。葉革質，橢圓形，長8-11厘米，寬3-5厘米，先端急尖，基部圓或鈍，無毛，邊緣有細鋸齒；葉柄長8-12毫米。花白色，單生於枝頂，直徑10-14厘米，無柄；苞片及萼片圓形，革質，外被灰色絹毛；花瓣8，闊倒卵形，長5-7厘米，無毛，基部連生約1.5厘米；雄蕊多輪，長2.5厘米，離生，無毛；子房有毛，5室，花柱長2厘米，先端5淺裂。蒴果球形，直徑6厘米，有宿萼包裹，5爿裂開。(26) 大苞山茶 （葛亮洪茶）
Camellia granthamiana Sealy
山茶科(Theaceae)
英文名 (English name): Grantham's Camellia
中國境內現狀：瀕危(EN)。已載入《中國植物紅皮書》和《廣東省珍稀瀕危植物圖譜》。
Status in China: Endangered (EN). Recorded in China Plant
Red Data Book and Illustration of Rare & endangered plant in Guangdong
Province.
形態特徵：喬木，高8米。葉革質，橢圓形，長8-11厘米，寬3-5厘米，先端急尖，基部圓或鈍，無毛，邊緣有細鋸齒；葉柄長8-12毫米。花白色，單生於枝頂，直徑10-14厘米，無柄；苞片及萼片圓形，革質，外被灰色絹毛；花瓣8，闊倒卵形，長5-7厘米，無毛，基部連生約1.5厘米；雄蕊多輪，長2.5厘米，離生，無毛；子房有毛，5室，花柱長2厘米，先端5淺裂。蒴果球形，直徑6厘米，有宿萼包裹，5爿裂開。
地理分布: 大帽山、馬鞍山。廣東。
生境與生態：生於林中。花期：3-4月。
本種花大，潔白，為良好的觀賞植物；種子可榨油供食用。本種最初於1955年在大帽山發現時僅有一株，隨後在馬鞍山和廣東省境內也發現有少數居群。其在香港的生長地點均位於在郊野公園內而受到保護。本種受《林務規例》(香港法例第96章附例)保護。此外，漁護署已進行遷地保護，採種育苗，城門標本林內有栽培。
Description:
Trees, to 8 m tall. Leaves leathery, elliptic, 8-11 cm long, 3-5 cm
wide, apex acute, base obtuse, glabrous, margin serrulate; petiole 0.8-1.2 cm
long. Flowers solitary and terminal, white, 10-14 cm in diam., sessile; bracts
and sepals leathery, orbicular, covered with grayish silky hairs outside; petals
8, broadly obovate, 5-7 cm long, glabrous, basal 1.5 cm connate; stamens in
many whorls, 2.5 cm long, distinct, glabrous; ovary hairy, 5-locular, styles
2 cm long, apex 5-lobed. Capsule globose, 6 cm in diam., wrapped with persistent
calyx, dehiscent in 5 valves.
Distribution: Tai Mo Shan and Ma On Shan.
Guangdong.
Habitat and ecology: In forest. Flowering:
Mar.-Apr.
The large white flower make this species an attractive ornamental plant. Seed oil is edible. The species was first discovered in a ravine of Tai Mo Shan in 1955 and only one individual was found at that time. Since then, a few more wild populations were found in Ma On Shan and also in Guangdong. In Hong Kong, the localities of its occurrence are in Country Parks under protection. The species is protected under the Forestry Regulations (Cap. 96 sub. leg.). AFCD have been actively propagating this plant and reintroducing it to the wild. Ex-situ conservation has also been adopted and living specimens are displayed in the Shing Mun Arboretum.
參考文獻 (References):
張宏達，1991：廣東植物誌2：127。廣東科技出版社，廣州。
張宏達，1998：中國植物誌49(3): 6，圖版1：1-2。科學出版社，北京。
閔天祿，2000：世界山茶屬的研究 223-224，圖版44：4-6。雲南科技出版社，昆明。
Sealy, J.R., 1956: Journal of the Royal Horticultural Society 81: 182.