﻿470 
  Arthur: 
  New 
  species 
  of 
  Uredineae 
  

  

  The 
  teliospores 
  of 
  P. 
  offuscata 
  have 
  been 
  found 
  only 
  in 
  the 
  

   province 
  of 
  Pinar 
  del 
  Rio, 
  Cuba. 
  The 
  earliest 
  record 
  was 
  brought 
  

  

  Mr. 
  PercvWil 
  

  

  m 
  

  

  on 
  a 
  dry 
  plateau, 
  doubtless 
  not 
  far 
  from 
  Herradura. 
  The 
  telio- 
  

   spores, 
  which 
  have 
  not 
  yet 
  been 
  found 
  In 
  abundance, 
  germinate 
  

   in 
  situ 
  upon 
  maturity. 
  The 
  same 
  species 
  occurs 
  in 
  the 
  vicinity 
  

  

  of 
  Rio 
  de 
  Janeiro, 
  Brazil 
  (Hedwigia 
  38: 
  257. 
  

   in 
  northern 
  Brazil 
  (Hedwigia 
  43: 
  161. 
  1904). 
  

  

  1899), 
  and 
  also 
  in 
  

  

  Puccinia 
  senilis 
  sp. 
  nov. 
  

  

  II. 
  Uredinia 
  hypophyllous, 
  scattered, 
  0.2-0.4 
  mm. 
  in 
  diameter, 
  

   early 
  naked, 
  pulverulent, 
  yellow, 
  ruptured 
  epidermis 
  inconspic- 
  

   uous; 
  urediniospores 
  obovoid 
  or 
  broadly 
  ellipsoid, 
  15-18 
  by 
  

   19-23 
  /i; 
  wall 
  light-yellow, 
  i 
  /x 
  thick, 
  sparsely 
  echinulate, 
  the 
  

   pores 
  very 
  inconspicuous, 
  apparently 
  3 
  or 
  4, 
  equatorial. 
  

  

  III. 
  Telia 
  amphigenous, 
  scattered, 
  round, 
  0.1-0.3 
  mm. 
  in 
  

   diameter, 
  early 
  naked, 
  pulverulent, 
  chocolate-brown, 
  ruptured 
  

   epidermis 
  inconspicuous; 
  teliospores 
  ellipsoid, 
  18-24 
  by 
  27-40 
  ju, 
  

   rounded 
  at 
  both 
  ends, 
  somewhat 
  constructed 
  at 
  septum; 
  wall 
  dark 
  

   chestnut-brown, 
  1.5-2.5 
  M 
  thick, 
  5-7 
  /x 
  over 
  the 
  germ-pores, 
  

   often 
  with 
  a 
  semihyaline 
  cap 
  over 
  apex, 
  coarsely 
  and 
  moderately 
  

   verrucose; 
  pedicel 
  colorless, 
  up 
  to 
  50 
  /x 
  long, 
  tapering 
  downward 
  

   and 
  roughened 
  below, 
  fragile. 
  

  

  On 
  Lippia 
  myriocephala 
  Cham. 
  & 
  Schlecht., 
  Laguna 
  on 
  Lake 
  

   Amatitlan, 
  Guatemala, 
  January 
  20, 
  1906, 
  II, 
  III, 
  W 
  . 
  A 
  . 
  Kellerman 
  

   5457. 
  Only 
  the 
  one 
  collection 
  is 
  known, 
  of 
  which 
  the 
  corre- 
  

   sponding 
  host 
  collection, 
  numbered 
  5209, 
  was 
  determined 
  by 
  

   John 
  Donnell 
  Smith. 
  The 
  material 
  is 
  not 
  abundant 
  but 
  the 
  rust 
  

   appears 
  distinct 
  and 
  unequivocal. 
  If 
  the 
  wall 
  of 
  the 
  teliospores 
  

   were 
  more 
  evidently 
  laminated, 
  there 
  could 
  be 
  no 
  hesitancy 
  in 
  

   placing 
  it 
  under 
  the 
  genus 
  Prospodium, 
  although 
  pycnia 
  have 
  not 
  

   been 
  detected. 
  The 
  species 
  seems 
  closely 
  related 
  to 
  Puccinia 
  

   peruviana 
  Sydow, 
  from 
  western 
  South 
  America 
  on 
  Lippia 
  iirti- 
  

  

  coides 
  . 
  

  

  Jackson 
  

  

  III. 
  Telia 
  caulicolous 
  and 
  petiolicolous, 
  oval 
  or 
  elliptic, 
  gre- 
  

   garious, 
  frequently 
  confluent 
  along 
  somewhat 
  swollen 
  stems 
  and 
  

   petioles 
  for 
  1-2 
  cm., 
  early 
  naked, 
  cinnamon-brown, 
  pulverulent, 
  

   ruptured 
  epidermis 
  noticeable; 
  teliospores 
  ellipsoid 
  of 
  oblong! 
  

  

  