《中国植物志》|| 岩梅科 DIAPENSIACEAE ||岩梅科 DIAPENSIACEAE ||岩梅属 Diapensia Linn.

1. 岩梅属——Diapensia Linn.
Linn. Gen. ed. 1. 52, 1737; Hook. f. in Kew Journ. 9: 372. 1857; A. Gray in Proc. Amer. Acad. 8: 246. 1873; Benth. et Hook. f. Gen. Pl. 2: 619, 1876; W. E. Evans in Notes Roy. Bot. Gard. Edinb. 15: 209. 1927.
垫状常绿平卧半灌木，通常多分布，高仅数(2-10)厘米，稀达15厘米，无毛。叶小，互生，匙状椭圆形或阔椭圆形至卵形，长4-10毫米，全缘，具鞘状叶柄。花单生于枝顶端，直立，几无花梗（但在果期伸长），白色、黄色或紫玫瑰色；萼片5，阔卵形，顶端钝或具短尖头；花冠漏斗状钟形或高脚状蝶形，浅5裂，裂片开展而顶端钝；雄蕊5，生于花冠筒喉部，花丝宽而短，花药钝尖，2室，纵裂；退化雄蕊无或极小；子房圆球形，3室，胚珠多数，倒生，花柱直立，柱头浅3裂。蒴果近圆球形，3室，室背开裂，每室具多数种子；种子近立方体形，种皮疏松，海绵状，胚乳丰富，胚近圆柱形，胚根靠近种脐。
属的模式种：Diapensia lapponica Linn.
全世界有6种，主要分布于我国西南部和缅甸、锡金、日本、苏联、北欧、北美。我国有4种和1变种1变型，仅见四川西部、云南西北部、西藏东部的高山林下或草坡岩石上。

《云南植物志》|| 岩梅科 Diapensiaceae ||岩梅科 Diapensiaceae ||岩梅属 Diapensia Linn.

1.岩梅属 Diapensia Linn.
常绿平卧半灌木，高仅数厘米。叶小，最长者不超过1厘米，狭匙形，覆瓦状排列，全缘，具鞘状叶柄。花单生，具梗或几无梗（但在果期伸长）；具苞片；萼片5，分离；花冠钟状或高脚状蝶形，5浅裂；雄蕊5，着生于花冠喉部，与花冠裂片互生，花丝短宽，花药2室纵裂，退化雄蕊无或很微小，如距状突起。子房上位，3室，每室有胚珠多数，花柱直立，柱头3浅裂。蒴果包藏于增大的花萼内，室背开裂；种子小，长棱形，种皮疏松，海绵状，胚乳丰富，胚近圆柱形。
5种，主要分布于我国西南部和缅甸、锡金，1种环北极分布俄罗斯（西伯利亚）、日本、北欧、北美。我国有3—4种，1变种及1变型。云南有3种，1变种及1变型。

《Flora of North America》|| Diapensiaceae || || Diapensia

4. Diapensia Linnaeus, Sp. Pl. 1: 141. 1753; Gen. Pl. ed. 5, 69. 1754.

Pincushion plant [Greek dia-, composed, and pente, five, alluding to sepal, petal, and stamen numbers]

Guy L. Nesom

Subshrubs, forming tussocks, cushions, domes, or mats, caulescent, taprooted. Stems mostly prostrate to decumbent, branched; branches procumbent or decumbent to erect. Leaves cauline, mostly opposite or compactly whorled, densely imbricate or crowded, 3-15 mm; petiole present or absent; blade oblong-lanceolate to narrowly spatulate, obovate, or spatulate-elliptic, slightly falcate, margins entire, apex acute or obtuse, surfaces glabrous, appearing 1-veined, sometimes with 1-2, indistinct, lateral veins. Inflorescences solitary flowers, pedicellate to subsessile, immediately subtended by 2-3 bracts. Pedicels ebracteate, elongating after anthesis. Flowers: sepals distinct or connate proximally; petals connate in proximal 1/2, corolla cupulate to campanulate, 7-10 mm, lobes white to cream or pinkish tinged to rose, margins entire; anthers 2-locular, without basal spurs, longitudinally dehiscent; filaments adnate to corolla tube; staminodes absent or vestigial. x = 6.

Species 5 (2 in the flora): North America, n Europe, Asia.

The three temperate species of Diapensia are endemic to the Sino-Himalayan Mountains. They differ as a group from the two boreal species by their production of vestigial staminodes (see F. Ludlow 1976).

SELECTED REFERENCE Evans, W. E. 1927. A revision of the genus Diapensia with special reference to the Sino-Himalayan species. Notes Roy. Bot. Gard. Edinburgh 15: 209-236.

《Flora of China》|| Diapensiaceae || ||岩梅属 Diapensia

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.