gemmae. Seta 0.8–1 cm. Capsule 1.5–2.5 mm; peristome teeth 32, linear, twisted 1/2 to once, to 1300 µm. Spores 11–12 µm. Distal laminal KOH reaction negative
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median sheath cells 80–100 × 8–12 µm (5:1), elongate-rectangular; sheath cells oblong-linear; cells of marginal lamina 12–16 µm, ± isodiametric; perichaetial
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stem-leaves, proximal laminal cells lax, wider, rectangular, 2–4: 1, 35–115 × 12–25 µm, sometimes somewhat hyaline. Specialized asexual gemmae absent. Sexual
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Stems 5–10 (–20) cm. Leaves 6–12 mm, subsquarrose and broadly spreading-recurved when moist; marginal lamina 2–5 cells wide, erect; lamellae 5–7 cells
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bilaterally symmetric, to 1.5 mm; peristome taxifolius-type; operculum ± as long as theca. Calyptra cucullate, smooth, 1–1.7 µm. Spores 7.5–12 µm. Habitat: Sandstone
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walls thickened, shortrectangular, not perforated; distal laminal cells 9–12 wide, 1: 1, papillae low, simple or scablike, 1 over each lumen, rarely absent
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speciesDidymodon leskeoides K. Saito J. Hattori Bot. Lab. 39: 508, plate 51, figs. 1–12. 1975,. Richard H. Zander Treatment appears in FNA Volume 27. Treatment on
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Smith Merrill Basionym: Polytrichum ohioense Renauld & Cardot Rev. Bryol. 12: 11. 1885 Treatment appears in FNA Volume 27. Treatment on page 131. Mentioned
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Mentioned on page 167. Cells of the mid-limb lamina (6–) 7–10 (–12) µm wide (mean 8.5 µm); cells of distal part of leaf-sheath nonpapillose on abaxial
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only perforated, arising from a low basal membrane, 20–35 µm high. Spores 12–17 µm. Habitat: Dry or fairly moist acidic rocks, boulders and outcrops Elevation:
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tip. Sexual condition dioicous or rhizoautoicous. Seta 5.5–12.5 mm. Capsule urn cylindric, 1.5–3 mm; operculum campanulate, 1–1.4 mm; peristome 600–1200
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J. Sci. 1: 289, plate 12. 1824 Treatment appears in FNA Volume 27. Treatment on page 616. Mentioned on page 615, 617. Plants 0.5–2 mm. Leaves lingulate
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distal cells 50–70 (–80) × 12–20 (–24) µm, 3–4: 1. Specialized asexual reproduction by rhizoidal tubers, in clusters of 2–5 on short lateral rhizoids of
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proximal to infertile and fertile stems. Sporophytes 1 per perichaetium. Seta to 12 mm. Capsule theca exserted, ± erect, radially symmetric to inclined, arcuate
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recurved; median and distal laminal cells rhomboidal to hexagonal, 3–4: 1, 35–70 × 12–18 µm, proximal cells rectangular, 2–4: 1, 40–70 × 18–24 µm, short-rectangular
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Plants less than 2.5 mm, gregarious in abundant, persistent, matted protonemata. Leaves setaceous to linear-lanceolate, 1.1–0.23 × 0.12–0.2 mm; margins serrate
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obscurely veined, lines of insertion on receptacle not prominent; petals 12, 16, or 20, outer greenish at least abaxially, inner creamy white; stamens
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easily distinguished. Spores of D. difficile are finely papillose-verrucose and 12–18(–20) µm; those of D. rhynchostegium are vermicularly papillose-verrucose
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Basionym: Tortula australasiae Hooker & Greville Edinburgh J. Sci. 1: 301, plate 12. 1824 Synonyms: Didymodon diaphanobasis Cardot Husnotiella torquescens (Cardot)
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1 full turn, basal membrane high, ca. 1000 µm; operculum ca. 1.5–2.5 mm. Spores (8–) 12–18 µm, spheric, finely papillose. Phenology: Capsules mature spring–early
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