Hedrites (axialites) are stacks of centrally connected lamellas that grow from solution or the melt. The crystal stems in a hedrite are perpendicular, or nearly so, to the faces of the ribbons; these faces contain chain folds. 

  The amorphous fraction in hedrites depends on the molecular weight and at high molecular weight is 20 % larger than that in single lamellas; this larger amorphous fraction is believed to be due mainly to exposed sections of chains connecting the crystal stems in two adjacent lamellas.

Fig.  9. Scanning electron micrographs of polyethylene hedrites grown from supercritical propane solution.

   Sheaves(hedrites)  

Fig. 10. Optical micrographs of lamellar structures of trans-1,4-polyisoprene from a Gutta Percha fraction crystallized by cooling a 0.05% solution in amyl acetate rapidly from 100 to 10 ¡É. A. Interference contrast. B. Transmitted light through crossed polaroids.

Fig. 11. Scanning electron micrograph of a trans-1,4-polyisoprene lamellar structure using a low molecular weight Balata fraction crystallized at 15¡É from 1% amyl acetate solution and reacted in suspension with OsO4 Au/Pd coated.