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Published In: Bulletin de la Société Botanique de France 83: 73. 1936. (Bull. Soc. Bot. France) Name publication detailView in Botanicus
 

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

Luisierella is characterized by its small size, blackish coloration, and rounded to obtuse leaves that are tubulose when dry but have margins plane or incurved when wet. Its upper leaf cells are strongly rounded and mammillose-bulging on the ventral surface but plane and smooth on the dorsal surface. The basal leaf cells are thin-walled, abruptly inflated and continued upwards along the margins in a v-shape pattern very similar to those of Tortella. The costa has a single stereid band, with ventral superficial epidermal cells well-developed. Zander (1993) described the genus as gynodioicous, i.e., with both monoicous and gynoicous plants. Individual plants can be synoicous, perigoniate, or have a mixture of synoicous and perigoniate inflorescences. Its capsules are cylindrical and the peristome varies from absent to rudimentary or weakly developed.

Luisierella has been placed in the subfamily Pottioideae tribe Hyophileae by Zander (1993) because its leaf cells are bulging mammillose on the ventral surface, but plane and smooth on the dorsal surface. The genus is very similar to Weisiopsis which differs mainly in having the inflated, thin-walled basal leaf cells extend higher near the costa than at the margins. Hyophila and Plaubelia are also similar to Luisierella in having the same leaf cell morphology; they differ from it in having mostly firm-walled basal leaf cells and a stem central strand.


 

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Luisierella Thér. & P. Varde, Bull. Soc. Bot. France 83: 73. 1936.

Plants small, blackish green. Stems erect, sparsely branched, sclerodermis present, central strand absent, sparsely radiculose. Leaves tubulose, incurved contorted when dry, spreading when wet, lingulate-lanceolate, concave, rounded to obtuse; margins unistratose, plane or erect-incurved, minutely crenulate by bulging cell walls, not bordered; costa subpercurrent, ventral surface cells quadrate-bulging above, elongate below, in cross-section guide cells and single (dorsal) stereid band present; upper cells mammillose-bulging on upper surface, plane to weakly convex, smooth on dorsal surface, rounded-hexagonal, basal cells abruptly enlarged, hyaline, rectangular, with thin, bulging walls forming a v-shaped pattern at the margins. Heteroicous; perichaetia terminal. Setae 1–2 per perichaetium, red. Capsules narrowly cylindric, erect to slightly curved, smooth, red; stomata in neck; opercula conic-rostrate; annuli well-developed; peristome present or absent. Calyptrae cucullate.

 
 
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