214 Conard — Fasciationin 



EXPLANATION OF PLATE XIX. 



Fig. I. Internal bundle system of a small ring-fasciation. Photomicrograph, 



magnified about 60 diam. 

 Fig. 2. External bundle system of ring-fasciated stem, being altogether nor- 

 mal in structure. Photomicrograph, magnified as Fig. I. 

 Fig. 3. Remnant of vascular bundle in the midst of the pith at the basal end 



of the ring-fasciated region. 

 Fig. ,4. Diagram of Ring-fasciated Stem. 



Ep. =: epidermis. Ph. = phloem. 



Co. ^= cortex. Ca. = cambium. 



B. S. = bundle sheath. Xy. = xylem. 



B. F. =bast fibre ring. I. Ph. = internal phloem. 



Med. =pith. 



Capital letters indicate external (normal) bundle system ; small letters 

 indicate internal (anomalous) system. 



Fig. 5. Portion (taken about 12 inches from the apex) of a very large ring- 

 fasciation. The ring splits above and spreads out, forming a plain fascia- 

 tion. Magnified one and one-half times. 



Fig. 6. Apex of a complete ring-fasciation, showing the internal cavity and 

 the crowded leaf rudiments. Natural size. From sketch by Miss M. Mac- 

 kenzie. 



LITERATURE. 



1. Caspary, R. — Ueber bandartiges Wachsthum, Schriften der Phys.-okon. 



Gesellsch. zu Konigsberg, 22 Jhrg., 2 Abth., 18S2. p. 40. 



2. Cuboni, G. — Sulla causa della fasciazione nello Spartuini junceum e nel 



Sarothammts scoparius. Boll. d. Soc. Bot. Ital., 1894. p. 281-82. 



3. Dammer, U. — Fasciated Roots of Pathos aurea, Card. Chron., 1886, No, 



675. p. 724. 



4. de Vries, H.— Over de erfelijkheid der fasciatien, Botanisch Jaarboek, 



Zesde Jhrg., 1894. p. no [39]. 



5- > — Sur un spadice tubuleux du Peperomia maculosa. Archives 



Neerlandaises, vol. 24, 1891. p. 258 et seq. 



6. Ewart, M. F. — On the Leaf-glands of j^ci;«a'« /rtwza^/rt/'a, Annals of Botany, 



vol. ix, June, 1895. p. 284. 



7. Gardeners' Chronicle. — Fasciated Roots [Piper sp.'\. December 18, 1886. 



p. 784- 



8. G6neau de Lamarli^re. — Sur la production experimentale de tiges et d' inflor- 



escences fasciees. Compt. Rend., 1899. I, p. 1601. 



9. Kronfeld, M.— Studien zur Teratologic der Gewachse, Verb. d. Zool. -Bot. 



Gesellsch. zu Wien, 1886. p. 103-122. 

 10. Macfarlane, J. M. — Inheritance of Acquired Characters, Science, vol. v, 

 1897. p. 940. 



