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1 March 2009 A synopsis of the Orthotrichum strangulatum complex (Orthotrichaceae)
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Abstract
The Orthotrichum strangulatum complex in eastern and interior North America has three species: O. strangulatum P. Beauv., O. parvulum Mitt. and O. lescurii Austin. All three form blackish green, rigid tufts and are restricted to calcareous substrates. Orthotrichum strangulatum has oblong-lanceolate leaves with partially thickened laminae and multistratose, recurved margins. Its oblong-elongate capsules have 16, reticulate-papillose, free exostome teeth. Orthotrichum lescurii has a more narrowly lanceolate leaf shape than O. strangulatum with unistratose laminae and revolute margins. Its ovate capsules have eight pairs of finely papillose exostome teeth. Orthotrichum parvulum has oblong-lanceolate leaves with unistratose laminae and plane leaf margins. It has oblong capsules with 16, reticulate-papillose, free exostome teeth. Orthotrichum peckii Sull. & Lesq. in Austin, O. porteri Sull. & Lesq. in Austin, and O. strangulatum var. missouricum Holz. ex Grout are synonyms of O. strangulatum. Orthotrichum strangulatum var. missouricum is lectotypified with a specimen from Holzinger's herbarium in minn.
John J. Atwood and Bruce Allen "A synopsis of the Orthotrichum strangulatum complex (Orthotrichaceae)," The Bryologist 112(1), (1 March 2009). https://doi.org/10.1639/0007-2745-112.1.208
Received: 9 November 2007; Accepted: 1 April 2008; Published: 1 March 2009
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