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FOC | Family List | FOC Vol. 14 | Diapensiaceae

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.

1 Shrublets 10–15 cm tall; leaf blade 6–10 mm; flowers on a 1–2 cm scape.   3 Diapensia wardii
+ Shrublets usually less than 10 cm tall; leaf blade 2–4(–7) mm; flowers subsessile with scape only elongating in fruit.   (2)
2 (1) Leaf blade adaxially with stomates, generally smooth and shiny.   1 Diapensia himalaica
+ Leaf blade adaxially without stomates, generally dull and very finely papillose.   2 Diapensia purpurea

Lower Taxa


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