Physocarpus

Not to be confused with Hydrangea radiata, which is also sometimes called ninebark for the ragged peeling of its bark.
Physocarpus
Physocarpus opulifolius
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rosaceae
Subfamily: Amygdaloideae[1]
Tribe: Neillieae
Genus: Physocarpus
(Cambess.) Raf. 1836[2]
Species

6-20, see text

Physocarpus, commonly called ninebark, is a genus of flowering plants in the family Rosaceae, native to North America (most species) and northeastern Asia (one species).

Description

Physocarpus are deciduous shrubs with alternately arranged leaves. The leaves are palmate with 3 to 7 lobes and often toothed edges. The inflorescence is a cluster of bell-shaped flowers with 5 rounded white or pink petals and many stamens. The fruit is a flat or inflated dehiscent follicle.[3][4] The genus name Physocarpus comes from the Greek for "bladder fruit", referring to the inflated fruits of some species.[5] The common name ninebark refers to the peeling bark of mature branches, which comes away in strips.[6]

P. opulifolius is cultivated as an ornamental plant. Several cultivars have been bred, particularly for foliage of varying colors, including 'Dart's Gold' and 'Luteus', which have yellowish leaves, and 'Monlo' and 'Seward', which have reddish purple foliage.[7]

Diversity

There are six[3][8][9] to 20[4] species in the genus.

Species include:

Bark of Physocarpus monogynus

Synonyms

Propagation

Propagation is by seeds sown as soon as ripe or they can be stored dry in airtight containers in a cool place for up to a year and then sown. Plants can be divided in the early spring, with a sharp spade or even an axe, chopping right through the middle. Softwood and hardwood cuttings are easy to root.

Problems

Garden writers describe few if any problems, but it is not unheard of armies of aphids attacking some varieties.

References

  1. D. Potter, T. Eriksson, R. C. Evans, S. Oh, J. E. E. Smedmark, D. R. Morgan, M. Kerr, K. R. Robertson, M. Arsenault, T. A. Dickinson & C. S. Campbell (2007). "Phylogeny and classification of Rosaceae" (PDF). Plant Systematics and Evolution. 266 (1–2): 5–43. doi:10.1007/s00606-007-0539-9. Note that this publication pre-dates the 2011 International Botanical Congress which mandates that the combined subfamily referred to in the paper as Spiraeoideae must be called Amygdaloideae.
  2. Physocarpus Tropicos.org. Missouri Botanical Garden. 22 Jan 2012
  3. 1 2 Physocarpus. The Jepson eFlora 2013.
  4. 1 2 Physocarpus. Flora of China.
  5. Coombes, Allen J. (2012). The A to Z of Plant Names. USA: Timber Press.
  6. Physocarpus opulifolius 'Diabolo'. Missouri Botanical Garden.
  7. Common Ninebark, Physocarpus opulifolius'. University of Illinois Extension.
  8. Oh, S. H. and D. Potter. (2005). Molecular phylogenetic systematics and biogeography of tribe Neillieae (Rosaceae) using DNA sequences of cpDNA, rDNA, and LEAFY. American Journal of Botany 92(1), 179-92.
  9. Oh, S. H., et al. (2010). Phylogenetic relationship of Physocarpus insularis (Rosaceae) endemic on Ulleung Island: implications for conservation biology. Journal of Plant Biology 53(1), 94-105.
  10. P. alternans, USDA Natural Resources Conservation Service PLANTS Profile, 22 Jan 2012
  11. P. amurensis Flora of China, www.eFloras.org 22 Jan 2012
  12. P. australis International Organization for Plant Information (IOPI) 22 Jan 2012
  13. P. bracteatus USDA-ARS Germplasm Resources Information Network (GRIN) 22 Jan 2012
  14. P. capitatus, USDA Natural Resources Conservation Service PLANTS Profile, 22 Jan 2012
  15. P. glabratus Tropicos.org. Missouri Botanical Garden. 22 Jan 2012
  16. P. malvaceus, USDA Natural Resources Conservation Service PLANTS Profile, 22 Jan 2012
  17. P. monogynus, USDA Natural Resources Conservation Service PLANTS Profile, 22 Jan 2012
  18. P. opulifolius, USDA Natural Resources Conservation Service PLANTS Profile, 22 Jan 2012
  19. P. pauciflorus International Organization for Plant Information (IOPI) 22 Jan 2012
  20. P. ribesifolia Tropicos.org. Missouri Botanical Garden. 22 Jan 2012
  21. P. hanceana USDA-ARS Germplasm Resources Information Network (GRIN) 22 Jan 2012
  22. P. intermedius Tropicos.org. Missouri Botanical Garden. 22 Jan 2012
  23. P. torreyi Integrated Taxonomic Information System (ITIS) 22 Jan 2012
  24. P. stellatus USDA-ARS Germplasm Resources Information Network (GRIN) 22 Jan 2012
This article is issued from Wikipedia - version of the 3/19/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.