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| 資料編號: | HK-4917 |
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| 中文名稱: | 翼莖闊苞菊(標室沒收錄) |
| 學名: | Pluchea sagittalis [找同屬植物] |
| 植物科名: (APG新系統) | ASTERACEAE菊科 [找同科植物] |
| 標室舊系統 | ASTERACEAE菊科[找同科] |
| 生長習性: | 草本 |
| 原生/外來: | 外來植物 |
| 圖片花色: | white |
| 發現開花: | Feb |
| 資料更新: | 20180828 10:46:57 pm |
| 備註: 特點是葉柄下延，在莖上形成狹翅。 又一種外來入侵種。 thanks Getmore's info 圖片攝於香港 Reference: blog.sina.com.cn 翼莖闊苞菊Pluchea sagittalis (Lam.) Cabera。菊科闊苞菊屬。 一年生草本植物，莖直立，全株具濃厚的芳香氣味，且被濃密的絨毛，最明顯的特徵是自葉基部向下延伸到莖部的翼。葉為廣披針形，上下兩面具絨毛，互生，無柄，尖銳的鋸齒緣。頭花大約7-8mm，具花梗，頂生或腋生呈傘房花序狀，花托扁平，光滑的，外緣小花多數，花冠白，瘦果褐色，圓柱形；中央小花多數，花冠白色，頂點凸出呈紫色，瘦果退化。 Pluchea sagittalis (Lam.) Cabrera is an unresolved name* The Plant List FOC: 翼莖闊苞菊 Pluchea sagittalis (FOC 仍用此名) Herbs, perennial, erect, aromatic, coarse, 1-1.5 m tall, ca. 1.5 cm in diam. at base, much branched, branches densely tomentose. Stems conspicuously winged by decurrent leaves. Median leaves sessile, lanceolate to broadly lanceolate, 6-12 × 2.5-4 cm, thinly tomentose with viscid glands on surfaces, base attenuate, margin serrate, apex acuminate. Capitula 7-8 mm in diam. when fresh, to ca. 10 mm in diam. when dried, 4-5 mm, in compound terminal and axillary corymbs; peduncle 5-25 mm. Involucre hemispheric; phyllaries greenish brown, 4- or 5-seriate, outer ones widely elliptic to widely obovate, 1-2 × 1-1.5 mm, tomentose abaxially, margins ciliate, apex acuminate, inner lanceolate to linear-lanceolate, 3-4 × 0.4-0.6 mm, grading to glabrous. Receptacle flat, glabrous. Marginal florets numerous; corolla white, 3-3.5 mm, 3-lobed; achenes brown, cylindric, with 5 pale ribs, 0.6-0.8 × ca. 0.2 mm, with viscid glands; pappus white, slightly longer than corolla. Central florets 50-60; corolla white, purplish toward summit, 2.5-3 mm, sparingly glandular hairy at base; anthers acute at apex, shortly tailed at base; anthers and style exserted; achenes vestigial. Fl. and fr. Mar-Oct. 2n = 20. | |
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