FIG. 416. Medullosa stems. A C, Medullosa anglica; A, transverse section; 

 a, accessory vascular strand; b, accessory strand enclosed by periderm; 

 c, band of periderm encircling steles ; d, sclerenchyma between leaf and stem. 

 B and C, longitudinal sections. (After Scott.) D, Medullosa stellata; a, star- 

 rings; p, 'partial pith.' (After Weber and Sterzel.) E, Medullosa Solmsi. 

 (After Weber and Sterzel.) F, Medullosa stellata, from a specimen in the 

 British Museum (No. 13767). G, Medullosa stellata var. cortica ; v, leaf- bundles. 

 (After Weber and Sterzel.) H, I, Medullosa Leuckarti. (After Weber 

 and Sterzel and Solms-Laubach.) K, Medullosa stellata var. gigantea; a, con- 

 centric stele ; b, b, later cylinders of centrifugal tissue. (Adapted from Weber 

 and Sterzel.) L, M edullosa Solmsi var. lignosa. M, Medullosa porosa. (L,M, 

 after Weber and Sterzel.) 



