Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 528
1 im^so<Jd^ik )%■:■- ■ >%?q3M been increased by imbibition; it seems probable, however, that theextine is not absolutely deficient at these points, but is onlythinned-away. Sometimes the pores are covered by little disk-likepieces or lids, which fall-off when the pollen-tube is protruded.This…
Microscopy · Biology
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