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3. Ceratostigma Bunge, Enum. Pl. China Bor. 55. 1833.
蓝雪花属 lan xue hua shu
Valoradia Hochstetter.
Shrubs, shrublets, or perennial herbs. Stems erect or spreading, rarely sublianous, branched, usually strigose. Leaf blade margin with incurved hairs. Inflorescences terminal or axillary, subcapitate to capitate, with 2 to many spikelets; spikelets usually 1-flowered; bracts herbaceous; bractlets 2, membranous. Calyx tubular, herbaceous along ribs, membranous between ribs except at base, usually split between ribs by fruiting time. Corolla salverform, extended beyond calyx; limb rotate; lobes obovate to obdeltate. Stamens hypogynous or becoming adnate to corolla base; anthers oblong-linear, slightly exserted. Ovary oblong-ovoid to ellipsoid, slightly 5-angular or 5-sulcate, apex conical. Style 1, apically 5-branched; stigma on inner side of style branches, covered with stalked or sessile capitate glands.
Eight species: E Africa, Asia; five species in China.
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| 1 |
Bud scales rigid, linear to needlelike; bark of old stems fissured and exfoliating; leaves (0.3--)3--6 mm wide |
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1 Ceratostigma ulicinum |
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Bud scales absent or scalelike; bark not fissured; leaves (6--)8--30(--54) mm wide. |
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(2) |
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| 2 (1) |
Corolla less than 2 cm; calyx 6.5--9.5(--10.5) mm; plants shrubby. |
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(3) |
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Corolla 2.2--2.8 cm; calyx 10--15(--18) mm; plants suffrutescent. |
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(4) |
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| 3 (2) |
Plants evergreen; leaves densely strigose; hairs on young shoots red-brown to dark yellow-brown |
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2 Ceratostigma griffithii |
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Plants deciduous; leaves glabrous or sparsely strigose, if densely strigose then hairs on young shoots grayish white or pale yellow |
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3 Ceratostigma minus |
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| 4 (2) |
Bud scales present at base of some branches; calyx lobes 4--4.5 mm |
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4 Ceratostigma willmottianum |
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Bud scale absent; calyx lobes ca. 2 mm |
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5 Ceratostigma plumbaginoides |
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Lower Taxa
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