討論:鳶尾屬

山羊百科，林文智老師的植物、山岳、攝影紀錄

1. Outer perianth segments reflexed; styles erect, bluish . . .. . . . . . . 1. I. formosana

1. Outer perianth segments spreading; styles horizontal, white . . . . . . . . . . 2. I. nantouensis

1. Iris formosana Ohwi 台灣鳶尾

Perennial herbs; rhizome creeping, thickened; stem erect, simple or branched at base, 20-25 cm long. Leaves ensiform, 25-45 cm long, 2-3 cm wide, apex acute to acuminate, sheathing at base, entire, upper surface lustrous green, pale, lower surface slightly glaucous, glabrous on both surfaces. Flowers showy, 6-7 cm in diam., white with bluish spots; spathe 2.5-3 cm long, green, keeled, margin membraneaceous; perianth tube ca. 1 cm long, white, enveloped by spathes; perianth segments 6 in 2 series; outer segments ovate-cuneate, 4-5 cm long, ca. 2.5 cm wide, white, with scattered yellow spots, clawed, margins denticulate, apex rounded, emarginate; inner segments oblanceolate-oblong, 2.5-3 cm long, ca. 1.5 cm wide; style 3-cleft, lobes ca. 2 cm long, 6-8 mm wide, lacerate; stigma ca. 1-1.5 cm long. Capsules oblong-ovoid, 3-4 cm long, perianth tube persistent at apex.

Endemic, 500-1,000 m in the northern and central parts of the island, roadsides and forest edges, uncommon.

NANTOU: Hoshe, Kao 3982; Wushih, Fukuyama s. n. 18 May 1934, Masamune & Mori s. n.. 1 Aug 1939.TAICHUNG: Kukuan to Techi, Ying s. n. in 1995.

2. Iris nantouensis S. S.Ying 南投鳶尾

Perennial herbs; rhizome creeping, thickened, stolons often present. Leaves ensiform, distichous, 60-120 cm long, 3-4.5 cm wide, base amplexicual, apex acute to acuminate, coriaceous, entire, primary veins inconspicuous, green, glabrous on both surfaces; peduncle 40-60 cm long; inflorescence racemose to racemoso-paniculate; bracts lanceolate, 5-7 cm long, 1.5-2 cm wide, apex acuminate; spathe 3-4-flowered, 3-5 cm long, apex acute; pedicel exceeding to spathe, 4-5 cm long, slender; flowers large, 4-6 cm in diam., perianth tube 1.5-2 cm long, slightly swelled upward; outer segments spatulate or obovatespatulate, 3.5-4.5 cm long, 8-25 mm wide, swollen apex rounded, obtuse, base attenuate, margins subentire to erode-denticulate, white with violet spots inside, keeled 1, yellow; inner segments oblanceolate or linear-lanceolate, 3.5-4 cm long, 6-15 mm wide, white, apex obtuse, base attenuate, margins entire to subentire; style branches 3, oblong-lanceolate, white, 1.8-2.7 cm long, 4-6 mm wide, deeply 2-lobed; lobes lacerate; ovary 1.5-2 cm long, trigonous-terete; stamens 3, filaments 1.5-2 cm long, white; anthers linear, 7-8 mm long. Capsules oblong-cylindric, 3-3.5 cm long; seeds several, globose.