Barbula convoluta (NL: Gewoon smaragdsteeltje / EN: Lesser Bird’s-claw Beard-moss). B. convoluta forms distinctive, bright yellow-green cushions or tight turfs (See previous post !) The shoots are typically 0.5–2 cm tall (occasionally up to 2.5 cm), and have rather spreading leaves which become very twisted when dry. The leaves are usually less than 1.5 mm long, more or less parallel-sided and have a shortly tapered tip. The nerve ends in the tip or may be very shortly excurrent. The leaf margins may be recurved below, but this can be difficult to see. Capsules are not all that common, but they are often very abundant when they do occur, and held upright on a yellow seta. The leaves immediately next to the base of the seta enfold it (hence the specific name ‘convoluta’).
Image: Ranst (BE) - 22/02/2011
© Johan Dierckx
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