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 428
becomes clear. The exine is studded with regu-larly-distributed large spines, and between them very numerousminute ones. The exit-places are round, the valve is lifted up,either on one side or altogether, by the papilla-like bulging ofthe intine. The valve has the structure of the surrounding… … THE POLLEN-GRAIN. 391 carbolic acid. In a word, the most favourable clearing medium foreach object must be found by exi^erimcnt. Upon the preparatioain oil of lemon or in chloralhydrate we can determine, aby optical sections, theposition of the valve insidethe exine, in which it is yfound wedged…
Botany · Plant physiology · Microscopy
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