﻿Arthur: 
  New 
  species 
  of 
  Uredineae 
  473 
  

  

  c 
  

  

  January 
  

  

  to 
  October 
  by 
  Mr 
  

   could 
  be 
  detected. 
  

  

  tJredo 
  nitidula 
  sp. 
  nov. 
  

  

  11. 
  Uredinia 
  amphigenous, 
  scattered, 
  roundish 
  or 
  oblong, 
  

   0-3~<^7 
  mm. 
  across, 
  rather 
  tardily 
  naked, 
  pulverulent, 
  dark 
  cin- 
  

   namon-brown, 
  ruptured 
  epidermis 
  conspicuous 
  ; 
  urediniospores 
  

   obovoid 
  or 
  ellipsoid, 
  18-24 
  by 
  24-29/1; 
  wall 
  cinnamon-brown, 
  

   1.5-2 
  fx 
  thick, 
  moderately 
  echinulate, 
  the 
  pores 
  2 
  or 
  3, 
  equatorial. 
  

  

  On 
  Altemanthera 
  pMloxeroides 
  Griseb., 
  Cahabon, 
  Guatemala, 
  

  

  F 
  

  

  October 
  27, 
  1877, 
  Von 
  Turckheim, 
  

  

  This 
  collection 
  is 
  represented 
  by 
  a 
  specimen 
  in 
  the 
  cryptogamic 
  

  

  herbariuni 
  of 
  the 
  New 
  York 
  Botanical 
  Garden, 
  where 
  it 
  is 
  labelled 
  

  

  '' 
  Uredo? 
  paranensis 
  Penningt." 
  It 
  is, 
  however, 
  noticeably 
  dif- 
  

  

  ferent 
  from 
  the 
  species 
  indicated 
  in 
  having 
  smaller 
  spores 
  with 
  

  

  thinner 
  walls. 
  

  

  Uredo 
  laeticolor 
  nom. 
  nov. 
  

  

  Uredo 
  Operculinae 
  Arth. 
  Mycologia 
  9 
  : 
  95. 
  1 
  9 
  1 
  7- 
  Not 
  U. 
  

  

  Operctilinae 
  Sydow, 
  Phil. 
  Jour. 
  Sci. 
  8: 
  476. 
  191 
  3. 
  

  

  My 
  attention 
  has 
  been 
  called 
  to 
  the 
  earlier 
  use 
  of 
  the 
  name 
  

   which 
  I 
  gave 
  to 
  this 
  convolulaceous 
  rust 
  from 
  the 
  West 
  Indies. 
  

   The 
  name 
  was 
  used 
  by 
  the 
  Sydows 
  for 
  a 
  Philippine 
  rust 
  on 
  Oper- 
  

   culina 
  Hirpethum, 
  which 
  appears 
  from 
  the 
  description 
  to 
  have 
  

   somewhat 
  smaller 
  and 
  thicker 
  walled 
  spores, 
  more 
  inclined 
  to 
  be 
  

   globoid, 
  and 
  paler 
  in 
  color. 
  

  

  Aecidium 
  Ixorae 
  sp. 
  nov. 
  

  

  0. 
  Pycnia 
  epiphyllous, 
  scattered 
  unevenly 
  over 
  large 
  discolored 
  

   areas 
  often 
  4-8 
  crri. 
  across, 
  punctiform, 
  prominent, 
  dark-brown, 
  

   becoming 
  whitish 
  by 
  age, 
  subepidermal, 
  flattened 
  hemispherical, 
  

   150-200 
  fx 
  in 
  diameter, 
  about 
  half 
  as 
  high, 
  with 
  a 
  flat 
  hymenium; 
  

   ostiolar 
  filaments 
  wanting. 
  

  

  1. 
  Aecia 
  hypophyllous, 
  opposite 
  the 
  pycnia, 
  scattered, 
  deep- 
  

   seated, 
  cylindric, 
  0.2-0.3 
  ^"^- 
  across; 
  peridium 
  colorless, 
  the 
  

   margin 
  strongly 
  recurved, 
  lacerate; 
  peridial 
  cells 
  rhombohedric, 
  

   strongly 
  imbricate, 
  the 
  exposed 
  inner 
  face 
  about 
  16-19 
  /i 
  across, 
  

   in 
  section 
  much 
  prolonged 
  downward 
  on 
  outer 
  side, 
  the 
  inner 
  

   wall 
  about 
  3 
  /x 
  thick, 
  verrucose, 
  the 
  outer 
  wall 
  about 
  2 
  /i 
  thick, 
  

   smooth; 
  aeciospores 
  globoid, 
  small, 
  16-19 
  ju 
  in 
  diameter; 
  wall 
  

   colorless, 
  i 
  /z 
  or 
  less 
  thick, 
  finely 
  verrucose, 
  appearing 
  smooth. 
  

  

  