-
United States Department of
Agriculture (USDA).
Retrieved 7
October 2015.
Sheviak,
Charles J. (2002). "Platanthera hyperborea". In
Flora of
North America...
- USA)
Spiranthes delitescens Sheviak (1990) –
reclusive ladies'-tresses (Southeastern Arizona)
Spiranthes diluvialis Sheviak (1984) – Ute's ladies'-tresses...
- recognized. They are: C.
parviflorum var.
exiliens Sheviak –
Alaska C.
parviflorum var.
makasin (Farwell)
Sheviak –
commonly called the "northern
yellow lady's-slipper";...
- 2305/IUCN.UK.2008.RLTS.T132834A3464336.en.
Retrieved 18
November 2021.
Sheviak,
Charles J. (2002). "Platanthera praeclara". In
Flora of
North America...
-
University Press. p. 33. ISBN 978-0-521-86645-3.
Retrieved 8
March 2021.
Sheviak,
Charles J. (2002). "Cypripedium acaule". In
Flora of
North America Editorial...
-
Federal Register. 57 (12): 2048–2054. 57 FR 2048 "Spiranthes
diluvialis Sheviak".
Integrated Taxonomic Information System.
Retrieved 7
January 2025. NRCS...
- complex,
exhibiting different morphologies throughout its range.
Charles Sheviak, now
retired curator of the New York
State Museum Herbarium,
explored this...
-
Botanical Garden, St. Louis, MO &
Harvard University Herbaria, Cambridge, MA.
Sheviak,
Charles J. (2002). "Cypripedium". In
Flora of
North America Editorial...
-
pollinated by
several species of
mosquito as well as by
other insects.
Sheviak,
Charles J. (2002). "Platanthera obtusata". In
Flora of
North America Editorial...
-
Pogonia ophioglossoides (snakemouth orchid) .
accessed 1.25.2016.
Charles J.
Sheviak, Paul M. Catling: Pogonia. In:
Flora of
North America Editorial Committee...
