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13. Gagea Salisbury, Ann. Bot. (Oxford). 2: 555. 1806.
顶冰花属 ding bing hua shu
Chen Xinqi (陈心启 Chen Sing-chi); Nicholas J. Turland
Szechenyia Kanitz.
Herbs perennial, small, bulbiferous. Bulbs ovoid to globose, covered with a tunic, distally sometimes with a collar of persistent leaf bases, basally sometimes with bulbels. Stem usually simple. Leaves basal or also cauline, linear or filiform. Inflorescence usually umbellate, corymbose, or racemose, less often reduced to a solitary flower, basally usually subtended by a bract; bracteole 1. Flowers bisexual. Tepals 6, free, in 2 whorls, yellow or yellow-green, very rarely white or other color, persistent, ± indurescent and accrescent in fruit. Stamens 6, equal or 3 longer; filaments filiform or proximally widened and flat; anthers basifixed. Ovary 3-loculed; ovules many per locule. Style usually rather long; stigma capitate or 3-lobed. Fruit a capsule, 3-angled, loculicidal, surrounded by enlarged, persistent tepals. Seeds many, globose to flat.
About 90 species: temperate regions of N Africa, Asia and Europe, mainly in C Asia and the Mediterranean region; 17 species (one endemic) in China.
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| 1 |
Leaves 1 or 2 basal only; leafy bract (floral leaf) subtending inflorescence 1, sometimes with extra, much smaller bracts; seeds globose or ovoid-globose, rarely flat. |
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(2) |
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Leaves 1 or 2 basal and 2--5 cauline; seeds flat, rarely polyhedral. |
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(8) |
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| 2 (1) |
Leaves semiterete, fistulose |
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4 Gagea fragifera |
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Leaves flat, not fistulose. |
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(3) |
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| 3 (2) |
Bulb without bulbel at base. |
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(4) |
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Bulb usually with 1 to many bulbels within or around tunic base. |
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(6) |
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| 4 (3) |
Leaves filiform, less than 1 mm wide; seeds flat |
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5 Gagea divaricata |
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Leaves linear or narrowly so, 2--10 mm wide; seeds globose. |
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(5) |
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| 5 (4) |
Leaves not falcate, 3--10 mm wide, not keeled abaxially |
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6 Gagea nakaiana |
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Leaves falcate, 2--3 mm wide, keeled abaxially |
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7 Gagea fedtschenkoana |
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| 6 (3) |
Bulbel 1, lateral, within tunic |
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3 Gagea filiformis |
| + |
Bulbels many, within or around tunic. |
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(7) |
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| 7 (6) |
Bulbels arranged in a ring, surrounding tunic base; style nearly as long as ovary |
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1 Gagea granulosa |
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Bulbels crowded, sublateral, within tunic; style much longer than ovary |
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2 Gagea terraccianoana |
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| 8 (1) |
Seeds polyhedral. |
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(9) |
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Seeds flat. |
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(10) |
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| 9 (8) |
Tepals yellow adaxially, yellowish green abaxially |
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16 Gagea tenera |
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Tepals yellowish white or whitish adaxially, pale yellow-green abaxially |
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17 Gagea ova |
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| 10 (8) |
Stigma deeply 3-lobed, lobes more than 1 mm |
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8 Gagea pauciflora |
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Stigma capitate or slightly 3-lobed, lobes very short, less than 1 mm. |
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(11) |
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| 11 (10) |
Bulblets present in axils of cauline leaves, globose. |
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(12) |
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Bulblets not present in axils of cauline leaves. |
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(14) |
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| 12 (11) |
Bulb with a collar of persistent leaf bases distally |
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9 Gagea jaeschkei |
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Bulb without a collar of persistent leaf bases distally. |
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(13) |
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| 13 (12) |
Leaves filiform, less than 1 mm wide; bulblets in axils of all cauline leaves |
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10 Gagea bulbifera |
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Leaves narrowly linear, 1--2 mm wide; bulblets only in axils of proximal cauline leaves |
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11 Gagea stepposa |
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| 14 (11) |
Tepals 1.4--1.8 cm; basal leaves not overtopping inflorescence |
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15 Gagea neopopovii |
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Tepals 0.8--1.2 cm; basal leaves overtopping inflorescence. |
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(15) |
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| 15 (14) |
Basal leaves nearly 2 × as long as stem |
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13 Gagea altaica |
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Basal leaves slightly longer than stem. |
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(16) |
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| 16 (15) |
Basal leaves 1 or 2; bulbs without bulbels at base; plants 3--6 cm tall |
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14 Gagea olgae |
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Basal leaf always 1; bulbs with several to many bulbels at base; plants 5--15(--30) cm tall |
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12 Gagea albertii |
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List of lower taxa
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