討論:油桐屬

山羊百科,林文智老師的植物、山岳、攝影紀錄

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1.葉基底部有 2 枚扁平無柄腺點 三年桐
1.葉基底部有 2 枚有柄腺點
2.果實扁平 日本油桐
2.果實突尖具三稜線 廣東油桐

A. Flowers longer than 1.5 cm long; fruits with 3–5 seeds; leaves with glands at sinus when lobed

B. Some leaves shallowly 3–5-lobed; fruits with 3 grooves; glands at apical part of petiole and base of blade usually with stalk

C. Leaves usually 3-lobed and more or less glaucous on lower surface in mature plants; fruits compressed globose, ca. 2.5 cm in across; flowers 1.5–1.8 cm long 1. A. cordata

C. Leaves usually 3–5-lobed; green on lower surface; fruits ovoid, 3–5 cm in across, verrucose on surface; seeds usually 3; flowers ca. 3 cm long A. montana

B. Leaves usually entire and pale green on lower surface in mature plants, without stalked glands; fruits globose, 4–5 cm in across, apex slightly acute, smooth on surface; seeds usually 5 A. fordii

A. Flowers shorter than 8 mm long; fruits with 1 or 2 seeds; leaves without glands at sinus when lobed A. moluccana

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