256 JOURNAL OF FORESTRY 



"pao pombo" from Brazil (Yale Nos. 3490 and 3505), Tapirira guay- 

 anensis or T. marchandii, show ducts in rays which produce on tangen- 

 tial surface oily specks readily visible with lens and sometimes with- 

 out it. 



Radial canals appear conspicuously on the tangential surface of a 

 specimen labeled "hoobooraballi" from British Guiana and which 

 presumably belongs to this family. 



Moll and Janssonius (16. II, p. 442) report canals in the rays of 

 the following: Buchanania florida, Gluta renghas, Spondias mangifera 

 var. javanica, S. dulcis var. acida, and Odina wodier var. wirtgenii. 



Vertical canals have been found only in Drimycarpus raccmosa. 

 (See former paper, p. 436.) 



Radial canals have been found in representatives of the following 

 genera: Astroniutn, Buchanania, Garuya, Gluta, Koodcrsiodcndron, 

 Odina, Parishia, Rhus, ScJiinopsis, Schinus, Spondias, and Tapirira. 



Araliacecc. — The occurrence of radial canals in Heptapleurum cllip- 

 ticum and Arthophyllum diversifolium has been noted and the structure 

 described by Moll and Janssonius (16, III, pp. 640, 645, 647, 673, 

 681). The latter instance confirms the opinion of the present writer 

 (Journ. For.. 1918, p. 438) that Viguer's "poches secretriccs" are true 

 radial ducts. 



Only radial canals have been observed in this family. The genera 

 so far reported as having them are: Arthophyllum, Chcirodendron, 

 Didymopanax, and Heptapleurum. 



Bomhacacecc. — A specimen (Yale No. 4052) of so-called "ceiba 

 wood" from commercial sources, apparently belonging to this family 

 but not positively identified, shows very distinct concentric layer of 

 dark colored gum ducts, resembling those in eucalyptus. 



A Colombian specimen (Yale No. 1540) of "ceiba," identified as 

 Ceiba pcntandra, shows a layer of gum ducts, in some places several 

 rows thick, presumably of pathological origin. 



The wood mentioned in the writer's former paper under the name 

 of Pachira sp. belongs to the new genus Bombacopsis. 



All ducts found in woods of the Bombacacece are vertical and of 

 the gummosis type. The woods are very soft. 



Borraginacece. — In a market specimen (Yale No. 4104) called "Bra- 

 zilian walnut" and identified by the writer as Cordia Goelldiana, the 

 "frei-jo" or "frei-jorge" of Brazil, small ducts, presumably of trau- 



