Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 508
ed the medul-lar >/ sheath. 368. The woody portion of thestem (Fig. 253, b, b), is made np ofwoody fibres, usually with the addi-tion of ducts of varions kinds ; these,however, are absent in one largegroup, the GoniferoB or Fir tribewith its allies (Figs. 258-260), inwhich the woody fibres are… … Diagram of tlie first formationof an Exogenous Stem;—a, Pith:b b, Bark; c <*, plates of cellulartissue (Medullar Kays) left be-tween the Woody Bundles d d.
Microscopy · Biology
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