Hamatocaulis Vernicosus Drepanocladus Vernicosus Varnished Hook-Moss

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Hypnales Hamatocaulis vernicosus Drepanocladus vernicosus Varnished Hook-moss Red patches Branching at about 90° to stem 1 cm Wide back to shoots 1 cm Identification An upright, mid-green pleurocarp with a hooked shoot tip and branches of various lengths held at 90° to the stem. Its leaves are broad-based and taper gradually to a long point in one direction. They usually have a red base and pleats. The pleats are emphasized by streaks of red running up the leaf. Many plants have this redness concentrated into a rectangle at the top of the stem where it bends over: a good field pointer. Shoots are 5 cm long or more. Leaves are 2–3 mm long. Capsules are very rare. Similar species Scorpidium cossonii (p. 722) is similar in size and upright growth form, but its leaves are shorter, wider and less tapering. They are also smoother, without pleats, giving the whole plant a shine that is missing from H. vernicosus. S. cossonii is dark green or dark red, without the bright red leaf base of H. vernicosus. Warnstorfia exannulata (p. 716) has narrow-based leaves (giving the whole stem a narrower back than H. vernicosus), unpleated leaves that tend to have the tips pointing in one direction at 90° to stem, rather than curving back towards stem, and a large group of distinct cells in the basal corners (pull off a leaf with fingernails), which are absent from H. vernicosus. Sanionia uncinata (p. 728) also has pleats, but is uniformly pale green, and its leaves are very long and narrow. Palustriella commutata (p. 698) and P. falcata (p. 699) also have pleats, but have tiny leaf-like structures on their stems. Habitat H. vernicosus grows in neutral flushes and fens, often withCalliergonella cuspidata, Sphagnum contortum and Warnstorfia exannulata. It particularly likes domed springheads, where alkaline water breaks through acidic peat, or areas where alkaline flushes spread onto flushed, acidic ground. 724 Photos Sam Bosanquet & Graham Motley (inset) Text Sam Bosanquet.

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