A Monograph of the Genus Streptopogon, Wils

Abstract

T HE genus Streptopogon was founded in 1851 by Wilson (33) on the South American moss described by Taylor (31) in 1846 as Barbula erythrodonta. The genus was then defined as follows: ' Calyptra mitriformis, superne scabra; peristomium simplex, ciliiforme; cilia 33 aequidistantia, in ciliola duo postice fissa, laevia, in spiram unam dextrorsum contorta, basi in membranam angustam coadunata; cellulae operculi contortae.-In its mitriform, scabrous calyptra this curious moss resembles some species of Tayloria, but the peristome is that of Barbula, to which genus it is closely allied.' A few years later Mitten (12 and 12*) referred to the present genus the moss, from Chile, described in 1842 (28) by Schwaegrichen as Barbula mnioides, and also the moss from Kerguelen Island published by Hooker and Wilson (8) in 1844 as Schistidium marginatum. In 1865 Hampe (5) described Streptopogon Lindigii from Colombia (New Granada). Spruce, in 1867, in his catalogue of the mosses collected by him on the Amazon and in the Andes (29), mentioned by name only 5. rigidus, Mitt., S. cavifolius, Mitt., and 5. erythrodontus var. clavipes, Spruce; these three plants were distributed by him in the ' Musci Amazonici et Andini.' S. cavifolius and 5. clavipes (but not S. rigidus) were described by Mitten in his ' Musci

<p><strong>Sobre el género <em>Streptopogon </em>(Pottiaceae, Musci) en Argentina subtropical</strong></p>

“…El tratamiento más detallado de las especies de Streptopogon es la excelente monografía de Salmon (1903), quien por entonces reconoció solamente cinco taxa entre los 27 descriptos en el género. Zander (1993), en su revisión de las Pottiaceae, confirma la identidad del género proveyendo una fina descripción del mismo, y acepta 14 especies y 2 variedades.…”

Circumscription and Phylogenetic Position of Two Propagulose Species of Syntrichia (Pottiaceae, Bryophyta) Reveals Minor Realignments within the Tribe Syntricheae

“…Other distinguishing characteristics of the genus according to Zander [3] are: (1) laminal KOH reaction usually red, (2) basal cells little differentiated from the upper cells (Figure 2H), (3) the presence of clavate propagula on leaves or costae (Figure 2A,B), (4) leaves entire to denticulate or serrate in the upper third (Figure 2C), ( 5) lack of hydroids in the costa, (6) transverse section of the costa with the dorsal stereid band round to semicircular, (7) costal dorsal epidermis present or occasionally absent (Figure 2D), and (8) perichaetial leaves not or little sheathing. Salmon [28], in his excellent monograph on Streptopogon emphasized its similarity to Syntrichia, but highlighted its generic differentiation on the basis of the smooth laminal cells and mitrate and scabrous calyptrae, although pointing out that some species of Streptopogon have glabrous calyptra. The placement of this genus in the family Pottiaceae is mainly supported by the haplolepidous, filamentous, and twisted peristome [3,26,28], resembling those of Syntrichia.…”

“…Salmon [28], in his excellent monograph on Streptopogon emphasized its similarity to Syntrichia, but highlighted its generic differentiation on the basis of the smooth laminal cells and mitrate and scabrous calyptrae, although pointing out that some species of Streptopogon have glabrous calyptra. The placement of this genus in the family Pottiaceae is mainly supported by the haplolepidous, filamentous, and twisted peristome [3,26,28], resembling those of Syntrichia. With the intention of circumscribing the two propagulose species, Syntrichia amphidiacea and S. gemmascens, that are closely related to Streptopogon, we here present a phylogenetic study of Syntrichia and its allied genera (Sagenotortula, Streptopogon, and Willia) on the basis of nuclear (ITS) and two plastid (trnL-F and trnG) markers, and a morphological study to (1) investigate if the molecular result agrees with prior morphological studies, (2) investigate the phylogenetic relationship of Syntrichia and Streptopogon within Pottioideae, and (3) determine their phenotypic differentiation, updating morphological distinctive characters at the generic level, and providing the morphological basis for differentiating taxa.…”

Validation of the New Species of <I>Streptopogon</I> (Pottiaceae, Bryophyta) and a Synopsis of the Genus for Brazil

“…A taxonomic treatment of the Streptopogon was published by Salmon (1903) and recently in a thesis of Casado (2000). Additional research on the group has been carried out by Matten and Schiavone (1998), Zander (1993), Sharp et al (1994), Allen (2002, and Costa (impublisbed).…”

“…Streptopogon was reviewed by Salmon (1903), who recognized five Neotropical species, and later by Casado (2000), who recognized seven species, citing three from Brazil: S. brasiliensis Casado Plants forming small tufts, 2-22 mm tall, olive-green. Stems erect, unbranched; rhizoids smooth.…”