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Published In: Öfversigt af Finska Vetenskaps-Societetens Förhandlingar 62A(9): 7. 1921. (Öfvers. Finska Vetensk.-Soc. Förh.) Name publication detailView in Biodiversity Heritage Library

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Weisiopsis has broad, rounded to obtuse leaves that are tubulose-incurved when dry and at times have incurved margins when wet. Its upper leaf cells are mostly mammillose-bulging on the ventral surface but plane and smooth on the dorsal surface (one of our species has them bulging on both surfaces); the basal cells are smooth and abruptly enlarged. The costa in Weisiopsis has a single (dorsal) stereid band and enlarged ventral surface cells. The genus is autoicous, has cylindrical capsules and usually distantly spaced peristome teeth (one of our species is eperistomate) that are deeply inserted within the mouth. Zander (1993) placed Weisiopsis in the subfamily Pottioideae tribe Hyophileae and considered it closely related to Ganguleea and Luisierella. Ganguleea, known from Nepal, India, and southeastern Brazil, differs from Weisiopsis in its pleurocarpous condition, consistently eperistomate capsules, and the lack of a stem central strand. Luisierella differs from Weisiopsis in having inflated, thin-walled cells extending up the basal margins in a strong v-shaped pattern.


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Weisiopsis Broth., Oefvers. Förh. Finska Vetensk.-Soc. 62A(9): 7. 1921. 

Plants small, light-green. Stems erect, not branched, sclerodermis and central strand present,; sparsely radiculose. Leaves erect at base, incurved when dry, spreading when wet; apices rounded or obtuse, at times apiculate; margins plane, erect, or incurved, entire to weakly crenulate, not bordered; costa subpercurrent, guide cells and single (dorsal) stereid band present, ventral surface cells enlarged and hyaline; upper cells mammillose-bulging on ventral surface, plane and smooth on dorsal surface, or bulging on both surfaces, rounded-quadrate to hexagonal, basal cells abruptly enlarged, hyaline, rectangular, thin-walled. Autoicous. Perichaetia terminal, perigonial buds lateral. Setae elongate. Capsules ellipsoid to cylindric; opercula conic-rostrate; annuli well-developed, persistent at capsule mouth; peristome absent or of 16 erect, well-spaced, non-twisted teeth, basal membrane absent. Calyptrae cucullate, smooth.


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