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Spiranthes parksii Correll. Navasota Ladies-tresses. Phen: Oct-Dec. Hab: Post oak savannas. Dist: Endemic to e. TX (Bastrop, Brazos, Burleson, Fayette, Freestone, Grimes, Jasper, Leon, Limestone, Madison, Milam, Robertson, and Washington counties).

Origin/Endemic status: Endemic

Taxonomy Comments: The taxonomic recognition of this taxon is controversial. Pace & Cameron (2017) have recently concluded it is better regarded as a race of Spiranthes cernua. Spiranthes parksii was shown to be an apomictic regional floral morph with little to no clear molecular, ecological, or phenological distinction from Spiranthes cernua and recognition of S. parksii would render S. cernua paraphyletic. See Dueck and Cameron (2008) and Pace and Cameron (2017) for more details.

Synonymy: = ETx1, FNA26, Tx, Correll (1950), Hough & Young (2021), Luer (1972); = n/a – S, S13; < Spiranthes cernua (L.) Rich. – K3, K4, Pace & Cameron (2017)

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
  • Great Plains: FACW (taxonomic split from wetland indicator species)
  • Midwest: FACW (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily: 9

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