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1. Diapensia Linnaeus, Sp. Pl. 1: 141. 1753.
岩梅属 yan mei shu
Shrublets, prostrate, compact, often forming a mat or cushion. Stems slender, many-branched. Leaves subsessile, often crowded, margin entire. Flowers solitary, subsessile or on a short scape. Calyx with 2 or 3 bracts at base. Corolla campanulate, 5-lobed to middle or more basally, caducous. Staminodes minute or absent. Ovary globose, 3-locular. Style erect, filiform; stigma entire, capitate, or slightly 3-lobed. Capsule 3-locular, ellipsoid or globular, surrounded by persistent calyx; scape elongating in fruit.
Four species: Asia, N Europe, North America; three species (one endemic) in China.
The circumpolar Diapensia lapponica Linnaeus could possibly be found in the Changbai Shan of S Jilin.
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| 1 |
Shrublets 10–15 cm tall; leaf blade 6–10 mm; flowers on a 1–2 cm scape. |
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3 Diapensia wardii |
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Shrublets usually less than 10 cm tall; leaf blade 2–4(–7) mm; flowers subsessile with scape only elongating in fruit. |
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(2) |
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| 2 (1) |
Leaf blade adaxially with stomates, generally smooth and shiny. |
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1 Diapensia himalaica |
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Leaf blade adaxially without stomates, generally dull and very finely papillose. |
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2 Diapensia purpurea |
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Lower Taxa
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