Phlox douglasii

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Phlox douglasii
Polemoniaceae - Phlox douglasii.jpg
Flowers of Phlox douglasii at the Giardino Botanico Alpino Chanousia
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Polemoniaceae
Genus: Phlox
Species:
P. douglasii
Binomial name
Phlox douglasii
Hook.
Synonyms [1] [2]
  • Phlox rigidaBenth.
  • Phlox douglasii subsp. rigida(Benth.) Wherry

Phlox douglasii, common name tufted phlox or Columbia phlox, is a species of perennial herb belonging to the family Polemoniaceae. In the past it has been mistakenly included within the species Phlox caespitosa . [1]

Contents

Description

Phlox douglasii can reach a height of about 10 cm, forming low mounds or cushions of simple needle-like dark green leaves, 4–8 millimetres (0.16–0.31 in) long, with sharp tips and forming short tufts. Growth is from short basal woody stems but during the growth season these are largely hidden by leaves. Both the leaves and the floral calyx bear short gland-tipped hairs. Flowers may be purple, pink, pale lavender or magenta-red, about 1.5 cm across, usually in terminal clusters of 1 to 3 flowers born on very short pedicels. They bloom from April to August. [1]

Distribution

Phlox douglasii is native to northwestern United States, mostly on the Columbia Plateau in Oregon and Washington State, and probably extending in similar habitat in northern California and parts of Idaho. [1] [3]

Habitat

This species grows in dry areas, sagebrush scrubs and woodlands, at elevation of 300–2,000 metres (980–6,560 ft) above sea level. It can be found in Columbia plateau scabland in rocky soil over shallow basalt bedrock. [1]

Cultivars

The following hybrid cultivars have received the Royal Horticultural Society's Award of Garden Merit:

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References

  1. 1 2 3 4 5 James H. Locklear (2010), "Columbia Phlox (Phlox douglasii Hook.)" (PDF), Kalmiopsis, 17: 1–8
  2. Jepson Herbarium - University of California, Berkeley
  3. Citizen science observations for Phlox douglasii at iNaturalist
  4. "Phlox douglasii 'Boothman's Variety'". RHS. Retrieved 18 January 2021.
  5. "Phlox douglasii 'Crackerjack'". RHS. Retrieved 18 January 2021.
  6. "Phlox douglasii 'Iceberg'". RHS. Retrieved 18 January 2021.
  7. "Phlox douglasii 'Kelly's Eye'". RHS. Retrieved 18 January 2021.
  8. "Phlox douglasii 'Red Admiral'". RHS. Retrieved 18 January 2021.