. Lichens. Lichens. A B Fig- 53. Rhizoid of Parmelia exasperata Carroll (P. aspidota Rosend.). A, hyphae growing out from lower cortex x 450. B, tip of rhizoid with gelatinous sheath x 335 (after Rosendahl). provided with a lower cortex of plectenchyma. In foliose lichens they are frequently abundant, though by no means universal, and attach the spreading fronds to the support. They originate, as Schwendener^ pointed out, from the outer cortical cells, exactly as do the cilia, and are scattered over the 1 Darbishire 1897. 2 Schwendener Please note that these images are extracted from sc

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. Lichens. Lichens. A B Fig- 53. Rhizoid of Parmelia exasperata Carroll (P. aspidota Rosend.). A, hyphae growing out from lower cortex x 450. B, tip of rhizoid with gelatinous sheath x 335 (after Rosendahl). provided with a lower cortex of plectenchyma. In foliose lichens they are frequently abundant, though by no means universal, and attach the spreading fronds to the support. They originate, as Schwendener^ pointed out, from the outer cortical cells, exactly as do the cilia, and are scattered over the 1 Darbishire 1897. 2 Schwendener Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Annie Lorrain. Cambridge, At the University Press

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Keywords: ., bookcentury1900, bookdecade1920, bookpublishercambr, bookyear1921