Schistidium rivulare (Brid.) Podp. Beihefte zum Botanischen Centralblatt. Zweite Abteilung, Systematik, 1911

Suárez, Guillermo M., Flores, Jorge R. & Muñoz, Jesús, 2018, On the identity of Schistidium malacophyllum Herzog (Grimmiacaea, Bryophyta), Phytotaxa 349 (3), pp. 298-300 : 298

Schistidium rivulare (Brid.) Podp. Beihefte zum Botanischen Centralblatt. Zweite Abteilung, Systematik ,

Pflanzengeographie, angewandte Botanik 28(2): 207. 1911. Type: “Ad Thuringici saltus rivulos frigidos, ex. gr. Prope

Klein Schmalkalden, E. Germany ” (Holotype: B-Br!)

= Schistidium malacophyllum Herzog Bibliotheca Botanica 87: 53. 1916. Grimmia malacophylla (Herzog) Brotherus Die natürlichen Pflanzenfamilien , Zweite Auflage 10: 311. 1924. Type : Bolivia Llavetal, Herzog 4925 (Holotype: JE!; Isotype: L!, B!). Syn. nov.

Bremer (1980) stated that S. apocarpum can be delimited by its leaves with acute, sometimes hyaline, apices and hardly distinct costa. In contrast with Bremer (1980) description, S. malacophyllum leaves are broadly ovate-triangular to ovate-lanceolate with subobtuse to blunt apex, no hyaline region is present and the costa is well defined and usually subpercurrent.

Additional features of this species involve stems rather stiff, erect to ascendant, in cross section consisting of 1–3 stratose cortex of small, brown cells, surrounding 4–5 rows of large, thin-walled cells; central strand small. Leaves planoconvex, semi-terete, 4–5 stratose, with 2 ventral and 6–8 dorsal epidermal cells in transverse section ( Figure 1 ). Setae short; capsules deeply immersed in perichaetial leaves; peristome teeth lanceolate, revolute; calyptra conical, smooth, mitriform, lobed at the base, not extending to the urn.

Select Specimens examined: ANTARTICA. South Shetland: King George Islands , 03 Jan 1980, R. Ochyra 33043 ( BA, LIL) ; crevices of wet rocks, near mouth of river draining into Undine Harbour, 21 Dec 1960, N. Greene 494 ( LIL). ARGENTINA. Tierra del Fuego: Lapataia , Cascada rio Pipo , 11 Jan 1971, C. Matteri 1748 ( BA, LIL). COLOMBIA. Santander: Eastern cordillera, on wet rock, near Vetas , 3100–3200 m, 26 Jan 1927, Killip & Smith C1021267 F ( F). PORTUGAL. Vila Real: tras-o-Montes e Alto Douro, embalse de Alto Tamega, bosque mixto de ribera con Populus, Fraxinus, etc. Sobre esquisto, 13 Jul 2011, J. Muñoz, F. Gutiérrez & G. Suárez ( MA 39920 ). Manteigas: Serra da Estrela , 3 km al S de Caldas de Manteigas , J. Muñoz ( MA 20936 ). SPAIN. Cantabria: Polaciones, vertiente NW del pico Tresmares, J. Muñoz ( MA 20927 ) .

Figures

FIGURE 1. A. leaves; B. Tips leaves; C. median cells; D. cross section leaves; E. Cross section stem.A= 1mm. B, C, D, E= 50 μm (from: Holotype).