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 188
obabilityof finding one thin enough for study.They can be found most readily atthe edges of the section. The pitsare seen in profile (Fig. 57), insidethe radial walls of those sieve-tubes which the razor has cut.They are traversed by groups ofvery fine threads, which have beendeeply stained. The… … Fig. 57.—Finns sylrestHs. Portionsof the wall of sieve-tubes after stainingwith aniline blue. A, Prior to theformation of the callus plate ; B, alterits formation ; C, from a sieve-tubewhich is past its period of activityand become functionless ( x 1500). 152 X. THE CONIFEROUS STEM. The…
Botany · Plant physiology · Microscopy
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