摘要
本研究比較台灣產野牡丹科植物11個屬21個種葉部形態，形態學的特徵包括脈形、毛狀體、表皮細胞和垂周壁、氣孔類型和結晶型，研究結果顯示如後。脈形分羽狀脈和掌狀脈二型，除革葉羊角扭以外，其它種均為掌狀脈。毛狀體分7型，為盾狀鱗片、囊袋狀腺毛、多列無分枝毛、多列無分枝腺毛、短柄腺毛、具臂毛和星狀及腺毛。除革葉羊角扭葉片不具毛狀體，其它種的葉片均具有短柄腺毛。此外，野牡丹藤屬葉上表皮和柏拉木屬兩葉表皮具有囊袋狀腺毛。葉表面表皮細胞為多邊形和不規則形；垂周壁為直線形、弓形、波形、彎曲形。氣孔類型分五型，為不規則型、橫列型、平列型、極附型和四輪列型。僅金錦香和水社野牡丹葉上表面具氣孔。結晶型分針狀和晶簇二型，然而，結晶無專一性和普遍性的出現，無法作為種和屬的描述。此外，野牡丹屬和金錦香屬多列無分枝毛上具有晶簇型結晶。依據本推論，野牡丹科的葉部脈形、毛狀體、表皮細胞與垂周壁和氣孔類型，可提供證據作為分類之參考。

ABSTRACT
A comparative morphological study on the leaf of Melastomataceae was made for 21 species of 11 genera in Taiwan. The morphological characters studied include leaf venation, trichome, epidermal cell, anticlinal wall, stomatal type and crystal type. The results are given as follows. Two types of venation are recognized, i.e. pinnate and palmate venations. The leaves of all species showed their palmate venation except for those of Memecylon lanceolatum. Seven types of trichrome could be observed in the studied species, which consist of peltate scales, bladder-like glandular hairs, multiseriate unbranched hairs, multiseriate unbranched glandular hairs, short-stalked glandular hairs, armed hairs and stellate with glandular hairs. All of species have short-stalked glandular hairs occurred on the leaves of all species except Memecylon lanceolatum which has no trichrome at all. In addition, bladder-like glandular hairs on upper epidermis of leaves in Medillia and on both epidermis of leaves in Blastus. The epidermal cells of the leaf surfaces are polygonal or irregular in shapes, and the anticlinal walls are straight, arched, repand and sinuous. There are five types of stomata, which are composed of anomocytic type, diacytic type, paracytic type, polocytic type and staurocytic type. Only Melastoma kudoi and Osbeckia chinensis have stomata at upper epidermis. Two kinds of crytals appeared, i. e. styloids and druses. However, the occurrence of crystal is unstable specifically and generically, which implies that it is invaluable for specific and generic delineation. Additionally, druses could be found epiphytic on multiseriate unbranched hairs of the genera Melastoma and Osbeckia. According to this study, the features of leaf venation, trichrome, epidermis cell, anticlinal wall and stomatal type could provide evidence for taxonomy of this family.

目次
圖表目次 Ⅱ－Ⅲ
中文摘要 Ⅳ
英文摘要 Ⅴ
壹、前言 1
貳、野牡丹科植物葉片之前人研究 3
參、材料與方法 9
肆、結果 12
伍、討論 66
陸、參考文獻 76

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