270 KANSAS UNIVERSITY SCIENCE BULLETIN. 



HlPPOCRATEACE^. 



According to Fritz Miiller (1866), secondary rings of vascular bundles 

 are found in the stems of the genus Salacia. These arise from a cambium 

 developed in the pericycle. 



Ampelidace^. 

 According to Schenek (1893), anomalous structure of the axis is 

 known only in a single genus, Tetrastigma. Nari'ow strips of cambium 

 are formed from the phloem parenchyma. 



LEGUMINOS^ffi. 

 Subfamily Papilionoide«. 



Successive rings of grovs^th in the pericycle or in the primary cortex 

 in species of Wisteria, Mucuna, Spatholobus, Pueraria, Pachyrhizus, 

 Rhynchosia, Dalbergia, and Machxriivni. 



Leguminos^e. 



Subfamily C.esalpinioidk^b. 

 Secondary rings of vascular bundles take place in the pericyclic par- 

 enchyma on the inner side of the sclerenchymatous ring, according to H. 

 Schenek (1898), in Bauchinia rubiginosa Bong, and in B. angulosa Vog., 

 and, according to Brandis and Gamble, in B. vahlii W. & A. 



FlCOIDE^. 



In the woody species rings or arcs of meristem appear successively in 

 the pericycle of the stem, giving rise to secondary vascular bundles and 

 intermediate tissue. The anomalous structure of the stem is usually 

 repeated in the root. 



Umbelufek^. 



The development of an intrafascicular cambial ring has been observed 

 by Mobius in Eryngiutn. lassauxii Decne. and E. serra Cham, et Schlecht; 

 externally it produces bast-like tissue, internally xylem with vessels. 



RUBIACE^. 



According to Witte (1886), cortical bundles originate in the bast of 

 Chiococca 7'acemosa; first a group of vessels is formed, around which a 

 cambium ring appears, producing woody tissue with medullary rays in- 

 ternally and phloem externally. 



COMPOSITyE. 



In the genus Mikania a second zone of growth is situated on one side 

 of the primary vascular bundle ring. This originates in the paren- 

 chyma of the pericycle. In Kleinia spimilosa Hort. Petrop., according 

 to Joh. Miiller (1893), there is a secondary vascular bundle ring arising 

 from the phloem of the primary ring. According to Kruch (1890), 

 in the basal part of the stem of Dahlia imperialis a secondary ring arises 

 from the endodermis. 



Candolleace^. 



According to Vesque (1878), a secondary ring of fiber-like scleren- 

 chyma enclosing a few vessels and small phloem groups is found in 

 Stylidium adnatiim R. Br., Stylidium bulbiferum Benth., Stylidium 



