﻿480 
  Arthur: 
  New 
  species 
  of 
  Uredineae 
  

  

  bold, 
  95-125 
  M 
  broad 
  by 
  50-65 
  ^ 
  high; 
  ostiolar 
  filaments 
  up 
  to 
  

   40 
  jU 
  long. 
  

  

  I. 
  Aecia 
  usually 
  hypophyllous, 
  crowded 
  in 
  groups 
  2-6 
  mm. 
  

   across, 
  cupulate, 
  small, 
  0.1-0.3 
  mm. 
  in 
  diameter; 
  peridium 
  pale- 
  

   yellow, 
  the 
  margin 
  recurved, 
  lacerate; 
  peridial 
  cells 
  rhomboidal, 
  

   14 
  18 
  by 
  24-29 
  fx, 
  overlapping, 
  the 
  outer 
  wall 
  7-9 
  fi 
  thick, 
  trans- 
  

   versely 
  striate, 
  smooth, 
  the 
  inner 
  wall 
  2-3 
  fx 
  thick, 
  closely 
  and 
  

   rather 
  finely 
  verrucosa; 
  aeciospores 
  globoid 
  or 
  ellipsoid, 
  small, 
  

   12-16 
  by 
  15-19 
  /i; 
  wall 
  colorless, 
  thin, 
  i 
  fi 
  or 
  less, 
  closely 
  and 
  

   finely 
  verrucose. 
  

  

  On 
  Mesadenia 
  atripUcifoUa 
  (L.) 
  Raf. 
  {Cacalia 
  atriplicifolia 
  L.), 
  

   Manhattan, 
  Kansas, 
  May, 
  1886, 
  W. 
  A. 
  Kellerman 
  (Rab.-Wint.- 
  

   Paz. 
  Fungi 
  Eur. 
  3833a), 
  same, 
  June, 
  1886 
  (Ellis 
  & 
  Ev. 
  N. 
  Am. 
  

   Fungi 
  1811), 
  Valley 
  Park, 
  Missouri, 
  May, 
  1887 
  (L. 
  H. 
  PammeU). 
  

  

  On 
  Mesadenia 
  reniformis 
  (Muhl.) 
  Raf. 
  {Cacalia 
  reniformis 
  

   Muhl.), 
  Somers, 
  Wisconsin, 
  June 
  3, 
  1894, 
  /. 
  /. 
  Davis 
  (type). 
  

  

  The 
  type 
  collection 
  of 
  this 
  species 
  was 
  found 
  in 
  abundance 
  in 
  a 
  

   small 
  area 
  where 
  Uromyces 
  minimus 
  Davis, 
  on 
  Muhlenhergia 
  

   sylvatica, 
  also 
  occurred, 
  and 
  at 
  the 
  time 
  was 
  thought 
  might 
  be 
  its 
  

   aecial 
  stage 
  (Bot. 
  Gaz. 
  19: 
  415. 
  1894; 
  Bull. 
  Lab. 
  Nat. 
  Hist. 
  

   Univ. 
  Iowa 
  5: 
  315. 
  1902). 
  That 
  assumption 
  has 
  not 
  been 
  

   disproven 
  but 
  seems 
  less 
  probable 
  now 
  than 
  at 
  first. 
  

  

  praecipuum 
  

  

  0. 
  Pycnia 
  amphigenous, 
  in 
  small 
  groups 
  about 
  2 
  mm. 
  across, 
  

  

  noticeable, 
  pale-yellow 
  becoming 
  dark-brown, 
  subepidermal, 
  flat- 
  

  

  tened-globoid, 
  1 
  10-130 
  /x 
  broad 
  by 
  8CH95 
  n 
  high; 
  ostiolar 
  filaments 
  

   up 
  to 
  60 
  n 
  long. 
  

  

  1. 
  Aecia 
  hypophyllous, 
  crowded 
  on 
  spots 
  2-10 
  mm. 
  across, 
  

  

  3-0 
  

  

  20-2 
  

  

  by 
  32-40 
  /i, 
  considerably 
  overlapping 
  by 
  a 
  long 
  projection 
  of 
  the 
  

   outer 
  wall, 
  the 
  outer 
  wall 
  thick, 
  9-1 
  1 
  ;x, 
  the 
  inner 
  wall 
  thinner, 
  

   4-4-5 
  M, 
  closely 
  and 
  noticeably 
  verrucose; 
  aeciospores 
  angularly 
  

   globoid 
  or 
  ellipsoid, 
  16-19 
  by 
  19-26 
  m; 
  wall 
  colorless, 
  thick, 
  2.5- 
  

   3.5 
  M, 
  very 
  closely 
  and 
  inconspicuously 
  verrucose. 
  

  

  On 
  Senecio 
  praecox 
  DC, 
  Mt. 
  Montezuma, 
  Sierra 
  de 
  Guadelupe, 
  

   State 
  of 
  Mexico, 
  Mexico, 
  July 
  8. 
  1905, 
  Rose, 
  Painter 
  & 
  Rose 
  

   8028; 
  Sierre 
  de 
  Pachuca, 
  State 
  of 
  Hidalgo, 
  Mexico. 
  July 
  20, 
  1905. 
  

   Rose, 
  Painter 
  & 
  Rose 
  Sygi 
  (type) 
  . 
  

  

  Purdue 
  University, 
  

  

  Lafayette, 
  Indiana 
  

  

  