Spiranthes incurva (Jenn.) M.C.Pace 2017
TYPE drawing by © Bobbi Angell/M C Pace and Brittonia 69: 331 M C Pace 2017
LATER
Common Name The Incurved Spiralis [refers to the incurved callosities of this species of hybrid]
Flower Size .16" [4 mm]
Found in Québec, New Brunswick and Ontario provinces of Canada, New Hampshire, Vermont, Pennsylvania, Michigan, Ohio, Indiana, Illinois, Missouri, Wiconsin, Minnesota, South Dakota, Kansas, Iowa and Nebraska as a medium sized, cold growing terrestrial with fasciculate, fleshy, slender tuberous roots giving rise to 1 to i5, basal, absent to withering at blooming , linear-lanceolate, to lanceolate, acuminate, tapered and decurrent below leaves that blooms in the later summer on an erect, terminal, peduncle to 10.8" [27 cm] long, glabrous, provided with 1 to 2 small leafy cauline bracts occasionally present (frequently absent), quickly reducing to adpressed, clasping, lanceolate, acute sheathing bracts and carrying a single row of flowers in a moderately to tightly coiled spiral, 1 to 4 ranked, many flowered inflorescence with moderately to densely pubescent, lanceolate, acuminate, concave around the ovary, longer than the ovary floral bracts and carrying white or pale ivory flowers
"Spiranthes incurva is most similar to its parental species: Spiranthes cernua and Spiranthes magnicamporum . It can be distinguished from S. cernua by its thickened central labellum, more narrowly lanceolate floral parts, frequently more stellate and ascending flowers, and more northern and western distribution, and it can be distinguished from S. magnicamporum by its larger callosities, slightly earlier flowering period, and non-papillate, paler labellum." M C Pace 2017
Synonyms Ibidium incurvum Jenn. 1906
References W3 Tropicos, Kew Monocot list , IPNI ;
Ann. Carnegie Mus. 3: 483 Jenn 1906 as Ibidium incurvum Jenn. 1906
* Brittonia 69: 331 M C Pace 2017 photos fide
--------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------------------------
