Corm ovoid-subglobose, 2-4(-5) cm long and 1.5-3(-4) cm broad, with loose, brown tunics, sometimes protracted into a wiry neck up to 12 cm long. Cataphyll 5-15 cm long, straw-coloured to brownish, apically dilated and terminated by an acute or mucronate tip. Stem above-ground part (6-)10-20(-45) cm high, simple or rarely forked. Leaves 2-5, usually 3, erecto-patent to spreading or recurved, 4-20 cm long, 1-3 cm wide near the base, tapering to an acute or acuminate tip, green or often somewhat glaucous. Raceme fairly dense to lax, short or elongated, 2-30 cm long, 3-25-flowered. Bracts lanceolate, acuminate, mostly about half the length of the pedicel or less, 1-5 cm long, lowermost bract longer and more leaf-like, up to 10 cm long. Pedicels erecto-patent, becoming spreading or somewhat reflexed, straight or curved, normally cernuous near the apex, (1.5-)2-6(-7) cm long. Perianth actinomorphic, 2-4 cm in diam. Tepals 10-25 mm long, becoming reflexed during anthesis; claw distinct, (1.5-)2-5 mm long, 1-1.3 mm wide, flattened; blade lanceolate or linear-lanceolate, (8-)9-18(-22) mm long, (1.5-)2-4 mm wide, with many (8-14) indistinct veins, dull-coloured in shades of green, purple or brown, often abaxially green and adaxially with a green centre and a purplish-maroon or brown base and margins, ± acute. Nectary a distinctly mouth-or funnel-shaped structure at the transition between claw and blade, its margin often irregular, emarginate or with a frontal slit, rarely forming an incomplete ring open at the back. Filaments (5-)7-13 mm long, slightly thickened below or at about the middle, 0.2-0.5(-0.7) mm thick, the basal 1/3-1/4 whitish or light-coloured, otherwise purplish. Anthers (2.3-)3-5 mm long, 0.8-1.5 mm thick, brownish-or yellowish-green (drying brown). Styles (4-)5-9(-10) mm long, erecto-patent to spreading, greenish-yellow, often purplish basally. Ovary oblong-ovoid, 2-3 mm long, greenish. Capsule ovoid-oblong, 1.5-2.5 cm long, 1-1.5 cm wide. Seeds globose or nearly so, 2-3 mm in diam., dark chocolate-brown to blackish-brown, smooth (but at high magnification 'micro-ruminate', with twisted ridges); raphe ridge-or wing-like along 1/3-1/2 of the circumference, up to 1 mm high, often lighter-coloured than the testa, sometimes with funiculus up to 3 mm long.
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Geophyte, 0.06-0.45 m high. Corms ovoid-subglobose, tunics loose, brown, subterranean neck wiry, ± 120 mm long. Stem above ground, 100-120 mm high, simple. Leaves (2)3(5), alternate, cauline leaves erecto-patent; blade linear-lanceolate, base 10-30 mm wide, apex acuminate. Inflorescence dense to lax raceme, 3-25-flowered. Bracts ± half pedicel length; lowermost leaf-like. Perianth actinomorphic; segments free, 10-25 mm long, unguiculate; claw distinct, blade ± lanceolate, basally auriculate, coloured in shades of green, purple and brown, reflexed during anthesis. Nectary between claw and blade, margins irregular. Stamens: filaments up to 13 mm long; anthers yellowish green. Ovary oblong-ovoid; styles up to 10 mm long. Flowering time Jan.-Mar. Fruit an oblong-ovoid capsule.
Geophyte, up to 500 mm high. Stem with above-ground part 100-200 mm long. Leaves 2-5, erect to spreading or recurved; blade 40-200 mm long, 10-30 mm wide at base, tapering to an acute or acuminate tip. Flowers: perianth with tepals 10-25 mm long, reflexed, nectary margin shaped like a funnel or protruding mouth, green, purple or brown; Jan.-Apr. Fruit ovoid-oblong, 15-25 x 10-15 mm.
Geophyte, up to 500 mm tall. Stem with above-ground part 100-200 mm long. Tepals 10-25 mm long, reflexed. Nectary margin shaped like a funnel or protruding mouth. Flowers green, purple or brown.
Like O. vulgare but nectary mouth protruding and funnel-or collar-like, sometimes incised.
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