Status: Native
Synonyms:
Barbula waghornei Kindberg
Didymodon fuscoviridis Cardot
Didymodon rigidulus var. rigidulus is a minute moss found growing densely adherent to boulders in the splash zone of streams at middle elevation as well as on rocks and boulders elsewhere. The leaves, mostly less than a millimeter long, are long lanceolate from an ovate base and obscurely papillose distally. The costa is bluntly excurrent. The leaf lamina distally is variably 1-3 stratose, but very commonly bistratose at the margins. Ventral stereids are absent from the costa. The leaf tips frequently appear prolonged, multistratose and fleshy. Multicellular gemmae are present. Many thanks to Kelly Allred for identifying this moss.
Please click on an image for a larger file.
Didymodon rigidulus var. rigidulus (3x macro wet), photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 40x photomicrograph of stem-- note that the entire stem is less than 2mm long, photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 100x photomicrograph of stem, photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 100x photomicrograph of leaf (0.9mm long), photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 100x photomicrograph of lateral view of leaf, photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 400x photomicrograph of leaf base, photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 400x photomicrograph of leaf tip, photo Russ Kleinman, Pinos Altos Range, along Hwy 15 near McMillen Cmpgd, March 2, 2011
Didymodon rigidulus var. rigidulus, 400x photomicrograph of cross section of stem with central strand, photo Russ Kleinman & Karen Blisard, Silver City Range, Little Bear Mountain, July 15, 2014
Didymodon rigidulus var. rigidulus, 400x photomicrograph of cross section of fleshy tip of leaf, photo Russ Kleinman & Karen Blisard, Silver City Range, Little Bear Mountain, July 15, 2014
Didymodon rigidulus var. rigidulus, 400x photomicrograph of cross section of leaf proximal to fleshy tip, photo Russ Kleinman & Karen Blisard, Silver City Range, Little Bear Mountain, July 15, 2014
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