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 211
that each vascularbundle of such a stem were in itself a stele, the cortex, medullaryrays and pith would form a collective ground-tissue of a kind 174 XIII. THE STEMS OF PTERIDOPHYTES. strictly comparable to that which we see in the rhizome of theFern.i Stele of Pteris.—In Pteris aquilina the… … Fig. 69.—Cross-section through a stele from the leaf-stalk of Pteris aquilina. sc,scalariform vessels ; sp, protoxylem ; in the scalarifonn vessel sc*, a piece of a ladder-like wall is broken through ; Ip, wood-parenchyma ; v, sieve-tubes ; s, phloem cells;pr, protophloem ; pp, starch sheath ; e,…
Botany · Plant physiology · Microscopy
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