-
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...
- 2305/IUCN.UK.2008.RLTS.T132834A3464336.en.
Retrieved 18
November 2021.
Sheviak,
Charles J. (2002). "Platanthera praeclara". In
Flora of
North America...
- recognized. They are: C.
parviflorum var.
exiliens Sheviak –
Alaska C.
parviflorum var.
makasin (Farwell)
Sheviak –
commonly called the "northern
yellow lady's-slipper";...
- as the name for
hybrids of
Spiranthes cernua and S. ochroleuca.
Charles Sheviak and
other researchers had long
suggested these species hybridized, but...
- (2): 183–188. Catling, Paul (January 1976). "Spiranthes
Magnicamporum Sheviak, an
Addition to the
Orchids of Canada".
Canadian Field-Naturalist. 90 (1):...
-
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...
-
Spiranthes diluvialis. The
Nature Conservancy.
Retrieved August 6, 2011.
Sheviak, C. J. (1984).
Spiranthes diluvialis (Orchidaceae), a new
species from...
-
Botanical Garden, St. Louis, MO &
Harvard University Herbaria, Cambridge, MA.
Sheviak,
Charles J. (2002). "Cypripedium". In
Flora of
North America Editorial...
- specimens". Rhodora. 110 (944): 389–405. doi:10.3119/07-24.1. S2CID 86405178.
Sheviak,
Charles J. (2001). "A role for
water droplets in the
pollination of Platanthera...
