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Published In: Bryologia Universa 1: 522. 1826. (Bryol. Univ.) Name publication detail
 

Project Name Data (Last Modified On 2/16/2011)
Acceptance : Accepted
Project data     (Last Modified On 2/16/2011)
Discussion:

Plaubelia is an older name for what is more commonly known as Neohyophila. The genus is usually placed in the Pottioideae because the costa has been thought to have only a single (dorsal) stereid band. But in fact two stereid bands are occasionally  present, and serial cross-sections of single leaves can have some areas with a single dorsal stereid band and others with dorsal stereids and ventral substereids. The genus has spathulate to oblong leaves with weakly differentiated basal cells, plane or incurved leaf margins, laminal cells bulging-mammillose on the ventral surface but plane to somewhat convex on the dorsal surface, a costa with a ventral epidermis of greatly bulging cells, and a peristome of 16 erect, non-twisted peristome teeth.

The leaves of Plaubelia and Hyophila are similar in shape, and both species have leaf cells that are bulging-mammillose on the ventral surface. Hyophila differs from Plaubelia in its usually larger size, eperistomate capsules, costa having a well-developed ventral stereid band, and its moderately bulging epidermal cells on the ventral surface of the costa. As treated by Zander (1993) Plaubelia has three species, only one of which (with two varieties) is known from Central America. Useful treatments of Plaubelia have been published by Crum (1965) and Zander (1983).


 

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Plaubelia Brid., Bryol. Univ. 1: 552. 1826.

Hyophilopsis Crum, Bryologist 68: 69. 1965.

Neohyophila Crum, Bryologist 68: 470. 1965 [1966]. 

Plants small, dark-green above, green-blackish below. Stems often strongly rosulate, irregularly branched, sclerodermis and central strand present, sparsely radiculose. Leaves erect at base, tubulose, incurved or spreading when dry, wide-spreading when wet, spathulate to oblong, flat along the costa; apices apiculate, rounded or obtuse; margins plane or incurved, entire to weakly and distantly denticulate, not bordered; costa subpercurrent, percurrent to short excurrent, apiculate, guide cells present, ventral stereid band absent or present, dorsal stereid band well-developed, epidermal layer well-developed; upper cells bulging-mammillose on ventral surface, plane, smooth or papillose on dorsal surface, rounded quadrate to rounded-hexagonal, basal cells differentiated only at extreme base, short-rectangular, to rectangular, thin-walled. Dioicous. Perichaetia terminal. Setae elongate. Capsules cylindric; opercula conic-rostrate; annuli well-developed; peristome of 16 erect teeth. Calyptra cucullate.

 

 
 
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