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資料編號: | HK-108 |
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中文名稱: | 青岡 |
學名: | Cyclobalanopsis glauca* [找同屬植物] |
異名: | Quercus glauca |
英文名稱: | Blue Janpanese Oak |
植物科名: (APG新系統) | FAGACEAE殼斗科 [找同科植物] |
標室舊系統 | FAGACEAE殼斗科[找同科] |
生長習性: | 喬木 |
原生/外來: | 香港原生植物 |
圖片花色: | yellow |
發現開花: | March |
圖片果色: | green |
資料更新: | 20220913 11:38:10 pm |
備註: *廣義櫟屬 = 狹義櫟屬 + 青岡屬 更多青岡圖片-Crawford 攝 娃娃手記: 1a. 堅果較大-華南青岡 1b. 堅果細好多 --2a.新葉葉底沒毛-- 小葉青岡 --2b.新葉葉底有毛-- 青岡 [看圖] [*小葉青岡都有長毛,不過甩得超快. thanks Crawford's info] Cyclobalanopsis glauca (Thunb.) Oerst. is a synonym of Quercus glauca Thunb. 果期: OCT Cyclobalanopsis glauca 主要用葉背去分(thanks Boris Cheng's info) 嫩葉被毛,老葉倒披針形(倒卵形),傾向青岡。(thanks Daniel Hang's info) 小葉青岡葉形相對穩定,不過青岡同一棵都有幾隻葉形,宜觀察多幾組老葉。(thanks Crawford's info) seijuen.co.jp-ref FOHK: Tree, to 20 m tall. Branchlets glabrous. Leaves leathery; petioles 1–2.5 cm, glabrous; leaf blade obovate-elliptic or elliptic, 6–15(–18) × 2.5 – 5(– 8) cm, base rounded or broadly cuneate, apex acuminate to caudate-acuminate, margin remotely serrate on the upper half, adaxially glabrous and shining, abaxially glaucous, with appressed hairs and scurfy lepidote; lateral veins 9 –10 on each side of midvein. Male spike (2–)5 – 6 cm, rachis brown-tomentose. Female spikes 1.5 –3 cm in fruiting time, with 1–3 cupules. Cupule bowl-shaped, 6 –7 mm high, 0.8 –1 cm in diam., sparsely pubescent outside, enclosing 1/3 of nut; bracts in 5–7 concentric rings. Nut ellipsoid-ovoid or ellipsoid, 1–1.5 cm high, 0.9 –1.2 cm in diam., scar flat or slightly convex, ca. 5 mm in diam. Locality: Shek O石澳, Cape D'Aguilar鶴咀, Pok Fu Lam, Ma On Shan. 中國植物誌 常綠喬木,高達20米,胸徑可達1米。 小枝無毛。葉片革質,倒卵狀橢圓形或長橢圓形,長6-13厘米,寬2-5.5厘米,頂端漸尖或短尾狀,基部圓形或寬楔形,葉緣中部以上有疏鋸齒,側脈每邊9-13條,葉背支脈明顯,葉面無毛,葉背有整齊平伏白色單毛,老時漸脫落,常有白色鱗秕;葉柄長1-3厘米。 雄花序長5-6厘米,花序軸被蒼色絨毛。果序長1.5-3厘米,著生果2-3個。殼鬥碗形,包著堅果1/3-1/2,直徑0.9-1.4厘米,高0.6-0.8厘米,被薄毛;小苞片合生成5-6條同心環帶,環帶全緣或有細缺刻,排列緊密。堅果卵形、長卵形或橢圓形,直徑0.9-1.4厘米,高1-1.6厘米,無毛或被薄毛,果臍平坦或微凸起。花期4-5月,果期10月。 | |
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