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Tortula protobryoides R. H. Zander [family ]
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 27,
Names
Tortula protobryoides R. H. Zander [family ], Bull. Buffalo Soc. Nat. Sci., 32: 226. 1993,
Phascum bryoides Dickson [family ], Fasc. Pl. Crypt. Brit., 4: 3, plate 10, fig. 3. 1801,. not Totula byoides Hooker 1828
Pottia bryoides (Dickson) Mitten [family ]
Protobryum bryoides (Dickson) J. Guerra & M. J. Cano [family ]
Treatment Author(s)
Richard H. Zander
Patricia M. Eckel
Information
Leaves ovate to oblong-lanceolate, apex broadly acute to rounded, mucronate to short-awned, margins revolute in mid 2/3–3/4 of leaf, weakly bordered from apex to near base with (2–)4 rows of weakly thicker-walled and less-papillose or smooth cells; costa excurrent, lacking an adaxial pad of cells though convex adaxially, distally narrow, 3–4 cells across adaxial surface; distal laminal cells subquadrate to hexagonal, occasionally somewhat elongated longitudinally, width 13–18 µm wide, 1(–2):1, papillose with 4(–6) simple papillae per lumen. Sexual condition autoicous. Sporophytes exerted. Seta length 0.2–0.4 cm. Capsule stegocarpic, not systylius, broadly cylindric, erect and nearly straight, urn ca. 1.4–1.5 mm; peristome remaining adherent to the inside of the operculum, teeth rudimentary to linear, to 300 µm, of several filaments variously anastomosing and weakly twisted, basal membrane length to 50 µm; operculum ca. 0.7–0.8 mm, not falling. Spores ca. 20–25 µm, spheric, densely low-papillose.
In Tortula protobryoides, only by dissecting the capsule can the peristome be revealed, as it is attached to the inside of the operculum. The capsule has an annulus but the operculum does not fall. The peristome adherent to the operculum is scarcely unique in the Pottiaceae. A peristomate capsule with operculum differentiated but not falling is matched in at least some specimens of Microbryum starckeanum var. fosbergii. In T. cernua, the peristome is attached and the operculum falls, taking the peristome with it. The gametophyte of T. protobryoides is similar to that of T. acaulon and T. lanceola but the papillae are more dense. The perigonia are borne at the ends of short, basal branches.
Phenology
Capsules mature winter–spring.
Altitude range
low elevations;
Distribution
Mexico (Baja California)Europesw Asia.USA Ariz.USA Calif.USA Colo.USA Minn.Canada B.C.Canada Sask.
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 27,
Names
Tortula protobryoides R. H. Zander [family ], Bull. Buffalo Soc. Nat. Sci., 32: 226. 1993,
Phascum bryoides Dickson [family ], Fasc. Pl. Crypt. Brit., 4: 3, plate 10, fig. 3. 1801,. not Totula byoides Hooker 1828
Pottia bryoides (Dickson) Mitten [family ]
Protobryum bryoides (Dickson) J. Guerra & M. J. Cano [family ]
Treatment Author(s)
Richard H. Zander
Patricia M. Eckel
Information
Leaves ovate to oblong-lanceolate, apex broadly acute to rounded, mucronate to short-awned, margins revolute in mid 2/3–3/4 of leaf, weakly bordered from apex to near base with (2–)4 rows of weakly thicker-walled and less-papillose or smooth cells; costa excurrent, lacking an adaxial pad of cells though convex adaxially, distally narrow, 3–4 cells across adaxial surface; distal laminal cells subquadrate to hexagonal, occasionally somewhat elongated longitudinally, width 13–18 µm wide, 1(–2):1, papillose with 4(–6) simple papillae per lumen. Sexual condition autoicous. Sporophytes exerted. Seta length 0.2–0.4 cm. Capsule stegocarpic, not systylius, broadly cylindric, erect and nearly straight, urn ca. 1.4–1.5 mm; peristome remaining adherent to the inside of the operculum, teeth rudimentary to linear, to 300 µm, of several filaments variously anastomosing and weakly twisted, basal membrane length to 50 µm; operculum ca. 0.7–0.8 mm, not falling. Spores ca. 20–25 µm, spheric, densely low-papillose.
In Tortula protobryoides, only by dissecting the capsule can the peristome be revealed, as it is attached to the inside of the operculum. The capsule has an annulus but the operculum does not fall. The peristome adherent to the operculum is scarcely unique in the Pottiaceae. A peristomate capsule with operculum differentiated but not falling is matched in at least some specimens of Microbryum starckeanum var. fosbergii. In T. cernua, the peristome is attached and the operculum falls, taking the peristome with it. The gametophyte of T. protobryoides is similar to that of T. acaulon and T. lanceola but the papillae are more dense. The perigonia are borne at the ends of short, basal branches.
Phenology
Capsules mature winter–spring.
Altitude range
low elevations;
Distribution
Mexico (Baja California)Europesw Asia.USA Ariz.USA Calif.USA Colo.USA Minn.Canada B.C.Canada Sask.
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