﻿OCT. 
  19, 
  1922 
  BLAKE: 
  NEW 
  SPECIES 
  OF 
  LETTERWOOD 
  397 
  

  

  4. 
  Piratinera 
  acutifolia 
  (Ruber) 
  Pittier, 
  Contr. 
  U. 
  S. 
  Nat. 
  Herb. 
  20: 
  100. 
  

  

  1918. 
  ShARPLEAF 
  LETTERWOOD. 
  Fig. 
  1, 
  c. 
  

  

  Brosimum 
  acutifolium 
  Huber, 
  Bol. 
  Mus. 
  Goeldi 
  6: 
  66. 
  1910. 
  

  

  Type 
  locality: 
  Primeval 
  woods 
  along 
  the 
  railroad 
  between 
  Belem 
  and 
  

   Braganga, 
  Para, 
  Brazil. 
  Type 
  collected 
  by 
  A. 
  Goeldi 
  (no. 
  8231). 
  

  

  Specimen 
  examined: 
  

  

  Brazil: 
  Rio 
  Branco 
  de 
  Obidos, 
  Para, 
  4.8. 
  1912, 
  Ducke 
  12155 
  (N). 
  

  

  This 
  species 
  is 
  readily 
  recognized 
  by 
  its 
  long-acuminate 
  leaves. 
  The 
  ver- 
  

   nacular 
  name 
  is 
  "murure." 
  

  

  5. 
  Piratinera 
  scabridula 
  Blake, 
  sp. 
  nov. 
  Roughleae 
  lETTERwood. 
  

  

  Fig. 
  1, 
  e. 
  

  

  Tree 
  with 
  sticky 
  latex; 
  young 
  branches 
  slender, 
  brown 
  or 
  purplish 
  brown, 
  

   minutely 
  and 
  rather 
  sparsely 
  spreading-hispidulous, 
  glabrescent, 
  the 
  older 
  

   flaky-barked, 
  becoming 
  gray; 
  buds 
  ovoid, 
  acute, 
  about 
  2.5 
  mm. 
  long, 
  finely 
  

   erect-hispidulous; 
  internodes 
  2 
  to 
  20 
  mm. 
  long; 
  stipules 
  not 
  seen; 
  petioles 
  

   2 
  to 
  5 
  mm. 
  long, 
  sulcate 
  above, 
  finely 
  hispidulous 
  with 
  spreading 
  or 
  erectish 
  

   hairs; 
  leaf 
  blades 
  elHptic 
  to 
  oval 
  or 
  sometimes 
  obovate-oval, 
  (2.7) 
  4.5 
  to 
  

   7.5 
  cm. 
  long, 
  (1.3) 
  2 
  to 
  4 
  cm. 
  wide, 
  obtuse 
  or 
  obtusely 
  short-pointed 
  to 
  

   rounded, 
  often 
  emarginate, 
  at 
  base 
  cuneate 
  or 
  rounded-cuneate 
  and 
  unequal, 
  

   entire, 
  subcoriaceous, 
  above 
  usually 
  light 
  green, 
  shining 
  in 
  age, 
  glabrous 
  

   except 
  along 
  the 
  hispidulous 
  costa, 
  beneath 
  pale, 
  along 
  costa 
  and 
  chief 
  veins 
  

   spreading-hispidulous, 
  on 
  surface 
  scabridulous 
  to 
  the 
  touch 
  with 
  very 
  dense 
  

   and 
  very 
  minute, 
  conical, 
  spreading, 
  whitish 
  hairs, 
  featherveined, 
  the 
  chief 
  

   veins 
  8 
  to 
  12 
  pairs, 
  diverging 
  at 
  an 
  angle 
  of 
  60° 
  to 
  nearly 
  90°, 
  united 
  inside 
  

   the 
  margin, 
  flattish 
  or 
  barely 
  prominulous 
  above, 
  prominulous 
  beneath, 
  

   the 
  costa 
  prominulous 
  above, 
  prominent 
  beneath, 
  the 
  secondaries 
  prominu- 
  

   lous-reticulate 
  beneath; 
  peduncles 
  axillary, 
  solitary, 
  erectish, 
  about 
  7 
  mm. 
  

   long, 
  minutely 
  antrorse-hispidulous; 
  young 
  receptacle 
  depressed-hemi- 
  

   spheric, 
  about 
  4 
  mm. 
  thick, 
  covered 
  with 
  orbicular, 
  peltate, 
  minutely 
  puberu- 
  

   lous 
  and 
  ciliolate 
  bracts; 
  9 
  flowers 
  about 
  5; 
  d" 
  flowers 
  numerous, 
  1-androus, 
  

   the 
  perianth 
  monophyllous, 
  apparently 
  split 
  on 
  one 
  side; 
  fruit 
  not 
  seen. 
  

  

  Type 
  in 
  the 
  U. 
  S. 
  National 
  Herbarium, 
  no. 
  1,120,360, 
  collected 
  below 
  

   Manakobi, 
  on 
  the 
  Corentyn 
  River, 
  British 
  Guiana, 
  December 
  13, 
  1909, 
  

   by 
  C. 
  W. 
  Anderson 
  (no. 
  406/C8). 
  Duplicate 
  in 
  the 
  herbarium 
  of 
  Yale 
  Uni- 
  

   versity. 
  

   Additional 
  specimens 
  examined 
  : 
  

  

  Surinam: 
  Casipora 
  Creek, 
  Surinam 
  River, 
  November 
  24, 
  1921, 
  Forestry 
  

   Service 
  5495 
  (Yale, 
  fragm. 
  N). 
  Irakoeka 
  Creek, 
  Surinam 
  River, 
  January 
  

   11, 
  1922, 
  Forestry 
  Service 
  5499 
  (Yale), 
  5500 
  (Yale, 
  fragm. 
  N). 
  

  

  The 
  vernacular 
  name 
  associated 
  with 
  the 
  type 
  is 
  "letterwood." 
  The 
  

   Dutch 
  names 
  of 
  the 
  other 
  specimens 
  are 
  given 
  as 
  follows: 
  "manletterhout" 
  

   (5495), 
  "kapiteinhout" 
  (5499), 
  "roode 
  letterhout" 
  (5500). 
  The 
  Arowak 
  

   Indian 
  name 
  of 
  5495 
  is 
  "koelero 
  boelekolle." 
  The 
  label 
  of 
  the 
  type 
  collection 
  

   states 
  that 
  the 
  flowers 
  were 
  greenish 
  yellow 
  with 
  brown 
  anthers. 
  Unfor- 
  

   tunately 
  only 
  a 
  single 
  receptacle 
  has 
  been 
  available 
  for 
  examination, 
  and 
  that 
  

   is 
  too 
  young 
  and 
  in 
  too 
  poor 
  condition 
  to 
  afford 
  much 
  information, 
  beyond 
  

   establishing 
  the 
  fact 
  that 
  the 
  plant 
  is 
  certainly 
  a 
  Piratinera. 
  

  

  