01186nas a2200121 4500008004100000245007700041210006900118300001200187520079200199653001200991100002001003856004101023 1990 eng d00aA New Spiranthes (Orchidaceae) from the Cienegas of Southernmost Arizona0 aNew Spiranthes Orchidaceae from the Cienegas of Southernmost Ari a213-2313 a
Spiranthes from isolated wetlands in Santa Cruz and adjacent Cochise Counties, Arizona, which in the past have been cited as S. graminea Lindl., differ from that species in several floral and vegetative characters and in chromosome number; they are readily separated from it by their few-septate trichomes. The more northern S. diluvialis Sheviak is larger-flowered with more ringent flowers and different flower and sepal orientation. The morphological and cytological features of the Arizona plants indicate that they represent a distinct species, described here as S. delitescens Sheviak. The cytology of this species suggests an origin through hybridization and amphiploidy, but the parental species are not identified.
10abiology1 aSheviak, C., J. uhttp://www.jstor.org/stable/23312709