Calymperaceae Kindb.

Family

Bryophytes > Dicranales

Characteristics

Plants small to medium-sized, mostly erect [prostrate and with ascending branches], in tufts, cushions, or gregarious, rarely single or in tufts of a few; dark green to yellowish brown stems. Stems simple or forked; central strand absent; rhizoids brown to red or dark purple, scanty to numerous, sometimes abundant and conspicuous; axillary hairs 2 to many per axil, proximal cells short and colored, or undifferentiated. Leaves often slightly to strongly dimorphic, mostly variously contorted when dry, straight and erect-ascending when moist, teniolae (intramarginal files of differentiated cells) present (in some Calymperes) or absent; proximal portion of leaves commonly sheathing, including usually conspicuous areas of smooth, enlarged, hyaline, internally and externally porose cells (cancellinae); distal portion of leaves oblong to ligulate, lanceolate, acuminate, or narrowly long-linear; margins of distal lamina mostly thickened and toothed, sometimes bordered entirely or in part with elongate hyaline cells; costa single, strong, percurrent to excurrent, in cross section showing a median row of guide cells with abaxial and adaxial bands of stereid cells (the ad-and abaxial bands of cells rarely thin-walled and parenchyma-like); medial cells of distal lamina mostly isodiametric, rarely transversely elongate, mostly variously papillose. Specialized asexual reproduction common by seriate-multicellular, fusiform-clavate to filiform gemmae, borne mostly adaxially on apices of often highly modified leaves. Sexual condition mostly dioicous, rarely monoicous; perigonia axillary, gemmiform, with highly reduced leaves; perichaetia terminal but quickly overtopped by innovations and then appearing lateral, leaves few, scarcely different from cauline leaves. Seta single, yellow to red, mostly elongate, smooth, erect. Capsule erect, mostly exserted, rarely immersed, yellowish to brown, mostly cylindric, smooth; stomata scanty, on neck, phaneropore; annulus differentiated in several rows of cells; operculum rostrate; peristome single, often vestigial or absent, teeth 16, variously papillose on external surface, mostly smooth on internal surface, with weak transverse bars. Calyptra cucullate and deciduous or rarely conic-mitrate, sometimes clasping the seta below the capsule and persistent and the spores then escaping through vertical fissures in the calyptra, naked, smooth or papillose, sometimes plicate. Spores spherical, mostly granular-papillose.
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Images

Calymperaceae unspecified picture

Identifiers

LSID 35002639
WFO ID wfo-7000000104
COL ID 7M4
BDTFX ID -
INPN ID 433772
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Calymperaceae

Lower taxons

Cleistostoma Palaeosyrrhopodon Thyridium Calymperes Exostratum Heliconema Leucophanes Syrrhopodon Exodictyon Codonoblepharum Mitthyridium Octoblepharum Arthrocormus Carinafolium