Orthotrichum Lyellii Lyell’S Bristle-Moss Key 271

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Orthotrichales Orthotrichum lyellii Lyell’s Bristle-moss Key 271 Gemmae on leaf blade 3 mm 2 mm Identification Well-grown O. lyellii is a striking plant, with loose tufts of shoots 3 to 4 cm tall, and dusted all over with brown gemmae. It tends to grow in a characteristic way on tree trunks: sprawling downwards and then curving up at the shoot tip. Poorly grown plants may be less than 1 cm tall, but remain distinctive because of their gemmae and sharply tipped leaves. The leaves are about 3.5 mm long. Capsules are rather rare and have 16 recurved outer peristome teeth. Similar species The gemmae and sharply tipped leaves make it difficult to confuseO. lyellii with other Orthotrichum species. Ulota phyllantha (p. 664) also grows on trees and shrubs, and has gemmae, but its leaves are strongly crisped (rather than slightly wavy) when dry, and its gemmae cluster on the leaf tip rather than being dusted over the leaf surfaces. The growth form of O. lyellii is reminiscent of Leucodon sciuroides (p. 675), but L. sciuroides lacks leaf gemmae and has nerveless, pleated leaves. Habitat Widespread, but uncommon on a wide range of trees, including ash (Fraxinus excelsior), elm (Ulmus), poplar (Populus) and sycamore (Acer pseudoplatanus). O. lyellii reaches its greatest abundance on the trunks of old ash trees in parkland or old poplars in plantations. It is uncommon on elder (Sambucus nigra), hazel (Corylus avellana) and willow (Salix), although it sometimes grows on the twigs of these species, even in hedges. 648 Photos Des Callaghan & Gordon Rothero (inset) Text Sam Bosanquet.

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Cryptogamie, Bryologie, 2004, 25 (4): 349-356 © 2004 Adac. Tous droits réservés Orthotrichum gymnostomum Brid. and other interesting Orthotrichaceae from Calabria (Italy) Francisco LARAa*, Domenico PUNTILLOb, Ricardo GARILLETIc & Vicente MAZIMPAKAa a Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain b Museo di Storia Naturale della Calabria ed Orto Botanico, Universita della Calabria I-87030 Arcavacata di Rende (CS), Italy c Departamento de Botánica, Facultad de Farmacia, Universidad de Valencia. Campus de Burjassot, E-46100 Valencia, Spain (Received 22 December 2003, accepted 13 February 2004) Abstract – Orthotrichum gymnostomum Brid. is ﬁrst reported from Calabria (Southern Italy); this is the ﬁrst record of the species in the Mediterranean Area. In addition, six other species are reported as new to the Calabria region (Orthotrichum acuminatum H. Philib., O. alpestre Hornsch. ex Bruch, Schimp. & Gümbel, O. philibertii Venturi, O. scanicum Grönvall, O. stramineum Hornsch., and O. schimperi Hammar), while new localities are given for Orthotrichum anomalum Hedw., O. shawii Wilson, O. speciosum Nees, O. tenellum Brid., and Ulota crispa (Hedw.) Brid., most of which had not been reported for this area after 1950. Orthotrichum / Ulota / Musci / Mediterranean area Resumen – Se da a conocer el hallazgo de Orthotrichum gymnostomum Brid. en Calabria (Sur de Italia), lo que representa la primera cita de esta especie en la Región Mediterránea. Además se aportan otras seis novedades para la región de Calabria (Orthotrichum acumi- natum H. Philib., O. alpestre Hornsch. ex Bruch, Schimp. & Gümbel, O. philibertii Venturi, O. scanicum Grönvall, O. stramineum Hornsch. y O. schimperi Hammar), y se proporcionan nuevas localidades para Orthotrichum anomalum Hedw., O.
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