Mammoth Area Orchids:  

Corallorhiza striata (striped coralroot), Piperia unalascensis (Alaska rein orchid), and Goodyera oblongifolia (rattlesnake plantain orchid)

Corallorhiza striata (striped coral root). These normally grow in shade, but I have found them in sun along the Narrow Gauge trail in Mammoth.  The Piperia unalascensis (Alaska rein orchids) are scattered along the uphill side of the trail. They are very hard to find. The Goodyera oblongifolia (Rattlesnake plantain orchid) are to the south of the Upper Terrace Road under some baby fir trees in the shade. The leaves are evergreen, and there is a large colony. Be very careful if you walk along the road edge!

  • Striped Coral Root
  • Corallorhiza striata, Narrow Gauge trail, Yellowstone, Mammoth
  •    6/30/15 1:20 PM MDT
  • 4000 × 6016   50mm A macro Pentax lens
  • 15_0530YNP
  •  
  • UTM GPS: 12T 0522808 4979499
  • Striped Coral Root Detail
  • _CFM3564
  • Corallorhiza striata, Narrow Gauge trail, Mammoth, Yellowstone
  • 5/30/15 1:22 PM MDT
  • 3416 x 2271
  • 50mm A macro Pentax lens
  • 15_0530YNP
  • UTM GPS: 12T 0522808 4979499
  • Striped Coral Root buds
  • CFM_2686
  • Corallorhiza striata,  Striped coral root,  Narrow Gauge trail, Mammoth Yellowstone
  • 5/30/15 1:03 PM MDT
  • 4000 x 6016
  • f/5.6, 1/200, ISO 400
  • 50mm A macro Pentax lens
  • 15_0530YNP
  • UTM GPS: 12T 0522878 4979768
Piperia
  • _CFM1725
  • |
  • Piperia unalascensis, Alaska rein orchid, Narrow Gauge trail, Mammoth
  • |
  • 6/27/14 1:27 PM MDT
  • |
  • f/5.6 1/160 ISO 800
  • |
  • 100mm Pentax macro
  • |
  • 14_0627YNP   GPS location not available
PiperiaWithBalsamroot
  • Piperia unalascensis blooming in balsamroot
  • Narrow Gauge trail,  Mammoth
  •    7/06/15 9:35 AM MDT
  •   f/5.6 1/500 ISO 400  50mm A macro Pentax lens
  •   15_0530YNP
  •  
  • UTM GPS: 12 T 522817 4979519
PiperiaDetail
  •  Alaska rein orchid detail
  • _CFM3930
  • Piperia unalascensis, Narrow Gauge trail, Mammoth, Yellowstone
  • 7/6/15 9:22 AM MDT
  •  
  • f/5.6 1/250  ISO 400 50mm A macro Pentax lens
  •   15_0706YNP
  •    UTM GPS: 12T 522878 4979718
PiperiaOnBlack
  •  Alaska rein orchid
  • _CFM3922
  • Piperia unalascensis, Narrow Gauge trail, Mammoth, Yellowstone
  • 7/6/15 9:09 AM MDT
  •  
  • f/5.6 1/125  ISO 400 50mm A macro Pentax lens
  •  15_0706YNP
  •   UTM GPS: 12T 522877 4979696


Blooming:   late June to July for Corallorhiza striata and Piperia unalascensis. Goodyera oblongifolia blooms in early August.

Mammoth Narrow Gauge Trail starts from Beaver Pond Trail, but turn left just before the footbridge and head uphill.

Sniff test: Coral roots always odorless. Alaska rein orchid has a strong pleasant aroma. Rattlesnake plantain orchids are also odorless.

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Native Orchids of Yellowstone by Colleen F Moore is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.