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| 資料編號: | HK-3324 |
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| 中文名稱: | 日本杜英 |
| 中文別名: | 薯豆(FOC) |
| 學名: | Elaeocarpus japonicus [找同屬植物] |
| 異名: | Elaeocarpus yunnanensis |
| 英文名稱: | Japanese Elaeocarpus |
| 植物科名: (APG新系統) | ELAEOCARPACEAE杜英科 [找同科植物] |
| 標室舊系統 | ELAEOCARPACEAE杜英科[找同科] |
| 生長習性: | 喬木 |
| 原生/外來: | 香港原生植物 |
| 圖片花色: | white_yellow_green |
| 資料更新: | 20200515 09:24:05 pm |
| 備註: 市區超常誤認品種 枝葉初出有被毛而後漸無毛，成熟葉背無毛。 葉柄長 2-6cm，葉基圓鈍至寬楔(沒下延)，葉緣疏鈍齒，側脈6－8對，葉背小脈明顯，具微小的黑色腺點。 thanks Crawford's info Refer to Daniel's facebook: 葉初時上下兩面密被銀灰色絹毛，很快變禿淨， 老葉上面深綠色，發亮，幹後仍有光澤，下面無毛，有多數細小黑腺點；邊緣有疏鋸齒；葉柄長2-6釐米，初時被毛，不久完全禿淨。 Ref: 葉初時下兩被銀灰色絹毛圖 FOC: Leaf blade 3-6 cm wide, lateral veins (6-)8 per side, petiole 2-6 cm.--日本杜英 Elaeocarpus japonicus Leaf blade 2-3 cm wide, lateral veins 4-6 per side, petiole 1.5-2 cm.--中華杜英_野杜英 Elaeocarpus chinensis 深圳植物誌: 喬木，高4-10m；枝條無毛。葉生於當年生枝上；葉柄長1.5-5cm，無毛；葉片橢圓形、披針形或狹長圓形，革質，長6-12cm，寬2-5cm，幼嫩時兩面疏被白色絹狀毛，成長葉無毛，下面有黑色小腺點，上面有光澤，基部寬楔形或近圓形，邊緣有疏鈍齒，先端漸尖或急尖，側脈每邊6-8條。總狀花序生於當年生枝葉腋或二年生枝已落葉的葉腋處，長5-6cm，有數朵至10數朵花；花序梗長0.7-1cm，與花序軸和花梗均被微柔毛；花梗長4-5mm；花雜性（兩性花和雄花）；兩性花：萼片5，卵狀披針形，長約4mm，兩面均被短柔毛；花瓣5，白色，長圓形，與萼片近等長，兩面均被短柔毛，基部微收窄，先端近全緣或淺裂；花盤5深裂，每裂片再有1淺裂，被絹狀毛；雄蕊15枚，長約3mm，花絲甚短，長不及1mm，花藥密被短柔毛，先端無刺；子房密被絹狀毛，3室，每室2胚珠，花柱長約3mm，下部被絹狀毛；雄花：萼片和花瓣均5或6，形狀與兩性花的相似；雄蕊9-14；退化子房很小或無。核果橢圓體形，長1-1.3cm，直徑5-8mm，表面光滑，無毛，內果皮有不規則的溝隙和3條直的縱溝。花期：4-5月。果期：7-8月。 FOHK: Tree, to 25 m tall. Branchlets glabrous. Buds sericeous. Petioles 2– 6 cm; leaf blade varied in shape and size, often ovate, sometimes elliptic, obovate, or lanceolate to narrowly oblong, 6–12(–17) × 3–6 cm, leathery, base rounded or obtuse, acute, or broadly cuneate, apex acuminate or acute, margin sparsely dentate, both surfaces densely silvery-grey-sericeous at first, glabrescent, black glandular-punctate abaxially; lateral veins 5– 8 pairs. Racemes axillary, 3– 6 cm. Flowers polygamous. Pedicels 3– 4 mm, puberulous. Bisexual flowers: sepals oblong, ca. 4 mm, pubescent on both surfaces. Petals oblong, as long as sepals, entire or incised, pubescent on both surfaces or only on abaxial surface. Stamens 15; anthers ca. 2 mm, without awns at apex, puberulous. Disc 5- or 10-lobed. Ovary pubescent, 3‑locular; style ca. 3 mm, pubescent. Male flowers: stamens 9 –12; pistillodes present or not. Drupe ellipsoid, 1–1.3 × ca. 0.8 cm, shiny, with 3 ventral sutures; seed 1, ca. 8 mm. | |
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