Physostegia

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Physostegia
Physostegia-virginiana-1-US.jpg
Physostegia virginiana
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lamiaceae
Subfamily: Lamioideae
Genus: Physostegia
Benth.

Physostegia, the lionshearts [1] or false dragonheads (in reference to their similarity to Dracocephalum ), is a genus of flowering plants in the family Lamiaceae, native to North America (United States, Canada, northern Mexico). [2] [3] They are erect rhizomatous herbaceous perennials inhabiting damp, sunny places. They grow up to 2 m (7 ft) tall with purple or pink tubular flowers in racemes in summer. [4]

The generic name comes from two Greek words, physa (a bladder) and stege (a covering), referring to the calyx, which becomes full of fruit when mature. [5]

Physostegia virginiana is the most common species, and is known as "obedient plant".

Species [2]
  1. Physostegia angustifolia Fernald - lower Mississippi Valley, southern Great Plains
  2. Physostegia correllii (Lundell) Shinners - Texas, northern Mexico
  3. Physostegia digitalis Small - Texas, Louisiana, Arkansas, Alabama
  4. Physostegia godfreyi P.D.Cantino - Florida Panhandle
  5. Physostegia intermedia (Nutt.) Engelm. & A.Gray - lower Mississippi Valley, southern Great Plains
  6. Physostegia ledinghamii (B.Boivin) P.D.Cantino - Northwest Territories, Alberta, Saskatchewan, Manitoba, North Dakota
  7. Physostegia leptophylla Small - Southeast from Florida to Virginia
  8. Physostegia longisepala P.D.Cantino - Texas, Louisiana
  9. Physostegia parviflora Nutt. ex A.Gray - western Canada (Manitoba to British Columbia), northwestern + north-central United States (Illinois to Washington)
  10. Physostegia pulchella Lundell - eastern Texas
  11. Physostegia purpurea (Walter) S.F.Blake - Southeast from Florida to North Carolina
  12. Physostegia virginiana (L.) Benth. - much of eastern + central US + Canada; northeastern Mexico

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References

  1. USDA, NRCS (n.d.). "Physostegia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2 October 2015.
  2. 1 2 Kew World Checklist of Selected Plant Families
  3. Biota of North America Program, 2013 county distribution maps
  4. RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN   978-1-4053-3296-5.
  5. Coombes, Allen J. (2012). The A to Z of plant names . USA: Timber Press. pp.  312. ISBN   978-1-60469-196-2.