﻿The 
  wood 
  of 
  Machaerium 
  Whitfordii* 
  

  

  Robert 
  B. 
  Miller 
  

  

  (with 
  eight 
  text 
  figltres) 
  

  

  Material 
  

  

  The 
  specimen 
  oi 
  wood 
  described 
  in 
  this 
  paper 
  Is 
  from 
  the 
  type 
  

   tree 
  of 
  a 
  recently 
  described 
  species 
  of 
  Machaerium, 
  known 
  as 
  

   Machaerium 
  Whitfordii 
  Macbride, 
  and 
  is 
  No. 
  415 
  in 
  the 
  collections 
  

   of 
  the 
  Yale 
  School 
  of 
  Forestry. 
  It 
  was 
  collected 
  in 
  the 
  forest 
  

  

  July 
  

  

  common 
  

  

  Whitford- 
  The 
  tree, 
  according 
  to 
  the 
  collector, 
  is 
  fairly 
  

   In 
  the 
  high 
  hills 
  of 
  Colombia, 
  attains 
  a 
  height 
  of 
  about 
  20 
  meters 
  

   and 
  Is 
  of 
  commercial 
  importance. 
  The 
  natives 
  call 
  it 
  "negrillo," 
  

   a 
  name 
  suggested 
  by 
  the 
  dark 
  color 
  of 
  the 
  heartwopd 
  and 
  not 
  

   restricted 
  to 
  this 
  species. 
  It 
  "belongs 
  to 
  the 
  section 
  Oblonga 
  

   and 
  is 
  most 
  closely 
  related 
  to 
  M. 
  Moritziantim 
  Benth. 
  and 
  M. 
  

   sordidum 
  Benth. 
  "t 
  It 
  is 
  related 
  also 
  to 
  the 
  true 
  rosewoods 
  of 
  

  

  commerce. 
  

  

  The 
  purpose 
  of 
  this 
  paper 
  is 
  to 
  supplement 
  the 
  botanical 
  

   description 
  of 
  Macbride 
  with 
  a 
  study 
  of 
  the 
  wood 
  structure. 
  

   The 
  wood 
  presents 
  some 
  interesting 
  features 
  of 
  value 
  for 
  diag- 
  

   nostic 
  purposes. 
  Unfortunately 
  there 
  is 
  no 
  authentic 
  material 
  of 
  

   other 
  species 
  of 
  Machaerium 
  wood 
  available 
  with 
  w^hlch 
  to 
  com- 
  

   pare 
  the 
  new 
  species. 
  

  

  Gross 
  and 
  lens 
  characters 
  

  

  Machaerium 
  Whitfordii 
  is 
  very 
  h 
  

  

  texture 
  

  

  more 
  

  

  mm 
  

  

  heartw^ood 
  

  

  varies 
  from 
  chocolate-brown 
  to 
  black, 
  and 
  is 
  streaked. 
  The 
  line 
  

  

  * 
  Contribution 
  from 
  the 
  Yale 
  School 
  of 
  Forestry, 
  No. 
  9. 
  

   t 
  Macbride, 
  J, 
  F. 
  Contr. 
  Gray 
  Herb. 
  II. 
  s<>'' 
  53- 
  I9i8. 
  

  

  73 
  

  

  