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FOC | Family List | FOC Vol. 15 | Primulaceae

7. Androsace Linnaeus, Sp. Pl. 1: 141. 1753.

点地梅属 dian di mei shu

Androsace erecta

Credit: Harvard University Herbaria

Herbs perennial, annual, or biennial, acaulescent, rarely caulescent with ascending or decumbent shoots from a caudex. Leaves forming a rosette, rarely alternate; rosettes solitary or clustered, forming lax mats or compact cushions. Inflorescences umbellate, rarely a solitary flower, with bracts. Flowers 5-merous, homostylous. Calyx campanulate to subglobose, shallowly to deeply lobed. Corolla white, pink, purple, or dark red, rarely yellow; tube usually ± inflated, ca. as long as to shorter than calyx; throat constricted; lobes entire or emarginate. Stamens included, inserted on corolla tube; filaments very short; anthers ovate, apex obtuse. Style not longer than corolla tube. Capsule subglobose, dehiscing nearly to base. Seeds few to many.

Approximately 100 species widely distributed in temperate regions of the northern hemisphere; 73 species native to China.


Key 3

1 Bracts 2-3 mm; calyx 2-2.5 mm, parted scarcely to middle, not enlarged in fruit.   (2)
+ Bracts 5-7 mm; calyx 3-4 mm, parted to middle or below, enlarged in fruit.   (3)
       
2 (1) Calyx cupular, without veins; scape glabrous; plants with numerous fibrous roots; taproot inconspicuous   21 Androsace filiformis
+ Calyx turbinate, distinctly 5-veined; scapes with branched hairs; taproot conspicuous   22 Androsace septentrionalis
       
3 (1) Scapes villous, with glandular hairs   23 Androsace maxima
+ Scapes puberulent, with simple and branched hairs   24 Androsace engleri

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