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Published In: Species Muscorum Frondosorum 164–165. 1801. (Sp. Musc. Frond.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 3/7/2011)
Acceptance : Accepted
Project data     (Last Modified On 3/7/2011)

Bartramia is a difficult genus to characterize. This is because it has three disparate sections, and many generalized Bartramiaceae-features, e.g., in its leaf shape, cell ornamentation, alar cell form, capsule form, stomata position, peristome form, and spore form. All Central American species of Bartramia belong to section Vaginella, a distinctive section marked by leaves that are strongly sheathing at base. Identification of the Central American species of Bartramia depends on careful observations on the leaf cells (relative wall thickness of the sheath cells, form of the shoulder cells), sexual condition, and peristome form. The following treatment is based largely on Fransén’s (1995) revision of the Neotropical species of Bartramia sect. Vaginella


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Bartramia Hedw., Sp. Musc. Frond. 164. 1801.

Plants small, medium-sized, or robust-sized, terrestrial, occasionally on tree trunks or soil over boulders and rock faces, in loose or dense, glaucous, yellow-green or green tufts. Stems erect, reddish brown, simple to sparsely branched, hyalodermis and central strand well-developed (hyalodermis absent in species outside Central America), sparsely to densely tomentose; rhizoids reddish brown, smooth or papillose. Leaves closely or distantly spaced, sheathing at base (non-sheathing in species outside Central America), erect, erect-appressed to erect-patent, or flexuose, crispate or straight, differentiated into a  hyaline, sheathing base and linear, multistratose limb (not differentiated in species outside Central America), leaf limb fragile or sturdy, occasionally leaves deciduous; margins plane or narrowly recurved, serrulate or sharply doubly serrate; costae single, strong, excurrent, sharply toothed to spinose above at back; sheath cells long, thin- or thick-walled, smooth; limb cells subquadrate, short- or long-rectangular, thick-walled, strongly papillose to mammillose by projecting upper and lower end walls, cells at leaf shoulder differentiated, often hyaline and fragile, alar cells weakly differentiated, reddish yellow, rectangular to subquadrate, thin-walled, bulging. Synoicous or dioicous. Perigonial and perichaetial leaves at times to 4 x the length of vegetative leaves. Setae straight or arcuate. Capsules stegocarpous (cleistocarpous in species outside Central America), globose to oblong, furrowed; exothecial cells irregularly hexagonal, rectangular to quadrate, thin- or thick-walled;  stomata in neck; opercula plano-conic or conic-mammillate; peristome double, single or absent, exostome narrowly triangular, papillose below on dorsal surface, dorsal trabeculae weak, ventral trabeculae strong, endostome basal membrane high or low, segments well-developed, split along the median line and each half diverging toward the cilia or absent, cilia rudimentary or absent. Spores spherical, oblong or reniform, 25–30 μm, coarsely papillose, red-brown. Calyptra not seen.


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