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7. Diapensiaceae (Link) Lindley

岩梅科 yan mei ke

Authors: Haining Qin & Bruce Bartholomew

Shrublets or perennial herbs, prostrate or decumbent, evergreen, mostly glabrous. Stipules absent. Leaves simple, spirally arranged or alternate, often crowded, subsessile or petiolate, pinnately veined. Flowers bisexual, actinomorphic, solitary or in a capitate raceme. Calyx 5-lobed, persistent; lobes free, imbricate. Corolla basally connate, apically lobed, caducous; lobes 5, spreading. Stamens 5[or 10], epipetalous, alternate with corolla lobes if 5; staminodes 5 if present, epipetalous, opposite corolla lobes, scalelike or spatulate; anthers 1- or 2-celled, dehiscing by slits. Ovary superior, 3[or 5]-locular; ovules numerous, axile, anatropous or amphitropous. Style simple; stigma lobed, capitate, or disciform. Fruit a 3[or 5]-locular capsule, loculicidally dehiscing. Seeds many, small, cylindrical; endosperm copious; embryo straight or slightly curved.

Six genera and ca. 15 species: Asia, Europe, North America; three genera (one endemic) and six species (three endemic) in China.

Chang Cheyung. 1990. Diapensiaceae. In: Fang Wenpei & Hu Wenkuang, eds., Fl. Reipubl. Popularis Sin. 56: 109–119.

1 Shrublets; leaf blade 0.2–1 cm; scape to 2 cm, often ± absent at flowering.   1 Diapensia
+ Perennial herbs from a woody rhizome; leaf blade (0.5–)1.5–12(–15) cm; scape 3–10 cm at flowering.   (2)
2 (1) Flowers in a capitate raceme; filaments pubescent; leaf blade margine entire.   2 Berneuxia
+ Flowers solitary; filaments glabrous; leaf blade margin serrate or occasionally subentire.   3 Shortia

Lower Taxa


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