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台灣黃眼草,中國特有植物。

1 台灣黃眼草 -基本資料

種中文名:台灣黃眼草
種拉丁名:Xyris formosana Hayata
科拉丁名:Xyridaceae
屬拉丁名:Xyris 。

2 台灣黃眼草 -外觀形態

台灣黃眼草(Xyris  formosana  Hayata,  Icon.  Pl. Formos.  5: 237. 1915;  Y. P. Yang 台灣植物志 5: 176.  圖1312.  1978.),叢生草本植物。葉狹線形,側面扁平,頂端漸尖,干時具條紋,邊緣具微小乳突;葉鞘具龍骨狀突起。

3 台灣黃眼草 -花序特徵

台灣黃眼草花葶圓柱形或近圓柱狀;頭狀花序近球形;基部苞片橢圓形,頂端微缺,沿中脈上半部有乳突,並具4條下行側脈;中部苞片寬橢圓形,下端較狹,有5-7條下行脈,而外側的脈常彎曲,苞片上部有一正三角形的乳突區,頂端具小刺尖,中脈處增厚,暗褐色,邊緣薄而色較淺。

台灣黃眼草台灣黃眼草

 

台灣黃眼草側生的2枚萼片舟狀,彎曲,膜質而透明,長4-6毫米,寬1.4-2毫米,頂端銳尖或稍尖,通常上部邊緣有細鋸齒,背部龍骨狀突起較窄,兩邊不等,向基部漸狹;中間的萼片風帽狀,長約2.5毫米,薄而透明,具1脈;花瓣具3脈,檐部倒卵形;雄蕊長約0.4毫米,寬0.1毫米,內面的葯室比外面者稍長,鈍頭;葯隔有膜質翅;退化雄蕊長約4毫米,頂端2分叉,畫筆狀;子房倒卵形,寬約2.5毫米;花柱上部3裂。 

4 台灣黃眼草 -生境分佈

台灣黃眼草產於中國台灣省。生於沼澤濕地。台灣黃眼草模式標本采自台灣省。台灣黃眼草未見標本,描述摘錄自《台灣植物志》。 

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