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 221
, and internally cortical cells, or phelloderm (pd^. The outercells are distinguished as packing cells. They become brown,but not corky; and moreover, as they increase in number, theysoon cause such a pressure on the epidermis that this is torn intoa fissure. In this way is produced the cortical… … /^ /^ Fig. 74.—Cross-section through a Lenticel of Sambucus nigra ; e, epidernnis ; 2>h,phellogen ; I, packing cells ; pi, cambium of the lenticel; pd, phellem (x 90). parts of the stem the lenticels appear as oval, slightly projecting,spots. Still younger stages are marked out by somewhat…
Botany · Plant physiology · Microscopy
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