Androsace septentrionalis

Androsace septentrionalis (pygmyflower rockjasmine, pygmy-flower rock-jasmine, northern rockjasmine,[1] Northern fairy candelabra,[2] Chinese: bei dian di mei[3]) is a species of annual herbaceous plant in the Primrose family (Primulaceae), native to North America,[2] Asia, and Europe.[3] It is a small plant with a rosette of leaves and umbels of small white flowers held on multiple stems.[2] It is parasitized by the oomycete species Peronospora agrorum. [4]

Androsace septentrionalis
Androsace septentrionalis subsp. subumbellata, Kyle Canyon, Spring Mountains, Nevada.
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Primulaceae
Genus: Androsace
Species:
A. septentrionalis
Binomial name
Androsace septentrionalis
Subspecies
  • Androsace septentrionalis L. subsp. septentrionalis
  • Androsace septentrionalis L. subsp. glandulosa (Woot. & Standl.) G.T. Robbins
  • Androsace septentrionalis L. subsp. puberulenta (Rydb.) G.T. Robbins
  • Androsace septentrionalis L. subsp. subulifera (A.Gray) G.T. Robbins
  • Androsace septentrionalis L. subsp. subumbellata (A. Nelson) G.T. Robbins

Androsace septentrionalis subsp. subumbellata is a small plant with naked stems arising from a basal rosette of simple leaves. The leaves are toothed and the stems terminate in an umbel of flowers. The very small flowers are five-cleft, and the sepals are persistent. The involucre bracts are linear. This subspecies is listed as threated in Minnesota, where it has been recorded growing in sandy, xeric habitats, around ancient beach ridges and sand prairies.[5]

References
  1. "ITIS Standard Report Page: Androsace septentrionalis". Integrated Taxonomic Information System on-line database. Integrated Taxonomic Information System (ITIS). Retrieved 2010-04-15.
  2. TWC Staff (2008-12-17). "NPIN: Androsace septentrionalis (Pygmyflower rockjasmine)". Native Plant Information Network (NPIN). Lady Bird Johnson Wildflower Center. Retrieved 2010-04-15.
  3. "Androsace septentrionalis". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2010-04-15.
  4. Constantinescu, O. (1991). "An annotated list of Peronospora names". Thunbergia. 15.
  5. Barbara Coffin; Lee Pfannmuller (1988). Minnesota's Endangered Flora and Fauna. U of Minnesota Press. p. 49. ISBN 978-0-8166-1689-3.
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