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 426
Fig. 142.—Pollen-grains of Malva crispa. A, piece of a grain seen from the surface.B, portion of a section through a grain. O, a pollen-grain removed from the stigma,and showing polkni-tubes. ^D, portion of a similar grain in optical section (.1, Band D, X 540, (J, x 240). pendicular position, or…
Botany · Plant physiology · Microscopy
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