158 TiJAXSACTlOXS AND PROCEEDINGS OF THE [Sess. uxiii. 



leaves, which, only if the plant is strong, produce bifoliar 

 spurs in their axils. We thus see that brachyoblasts and 

 cryptoblasts produce either rosette shoots or branches of 

 unlimited growth according to the conditions which induce 

 their development. A knowledge of these conditions is not 

 only of interest to the botanist, but is of practical import; 

 ance to the forester and gardener. In order to make my 

 meaning more apparent, let me quote Dr. Masters. On 

 page 7 of " The Report on the Conifer Conference," he 

 says : " I may also call your attention to the way in 

 which some of the shoots of some species of pines are 

 clothed to the base with leaves, whilst in others the base 

 of the shoot is bare. - The scraggy unfurnished appearance 

 of some old pines is accounted for by this peculiarity. 

 What to suggest as a remedy in this case is not so easy ; 

 nevertheless the frequent appearance of numerous adventi- 

 tious shoots on the trunks of such species as Finns rigida 

 and Sahiniana or Sequoia sempervirens seems to show that, 

 by a judicious disbudding or removal of the tips of some of 

 the upper shoots forming the head, a more bushy, or, as 

 gardeners call it, a more furnished, habit would result" 

 I willingly agree with Dr. Masters, that by a careful and 

 judicious disbudding the appearance of a scraggy pine tree 

 might be vastly improved, and if all pines are not so 

 fortunate as Fin /is rigida and Sahiniana in possessing 

 adventitious shoots, still they all have iuterfoliar buds 

 which, given the proper conditions, would produce the 

 same results ; and I hope to be able to throw fresh light 

 on the matter when the results of my experiments, now in 

 progress, are to hand. 



The work of this, and the preceding paper, was done in 

 the Botanical Laboratory, St, Andrews, and I have to 

 express my appreciation of the facilities afforded me there. 

 I am specially indebted to the lecturer, ^Ir. liobertson, for 

 the photomicrograph. 



JilOKERENCES. 



iJr. \'. Tiibeiif. — Die Coniferen. 



Prof. ]{. Ilartif^. — Baumkrankliciten. 



Hcmpel u. Wiltielin. — Ijiiuine u. Striiuclier des Waldes. 



Wilkomrn. — Waldlmcliloin. 



Schacht. — Ix'lirljiicli dor Anatomic u. Physiologic. 



M. T. Afasters. — Kejiort on Conifer Conference. 



