Handbook of practical botany for the botanical laboratory and private student (1908)
Strasburger, Eduard, 1844-1912, Hillhouse, William, 1850-1910 · London, S. Sonnenschein; New York, Macmillan · leaf 298
the threads will be seen single larger,globular cells (h), which have a thicker cell-wall,appear yellowish or brownish in colour, and havevery reduced homogeneous contents. These arethe so-called heterocysts, which are incapable ofdivision and of unknown function. At the pointsof attachment to the… … Fig. 99.—AnabcenaAzollcB. a to d, suc-cessive stages in thedivision of vegetativecells ; h, a limited cell,or heterocyst ( x 540). 262 XX. STRUCTURE OF THE THALLOPHYTA.
Botany · Plant physiology · Microscopy
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