﻿Haynes: 
  Six 
  species 
  of 
  Riccia 
  

  

  287 
  

  

  ; 
  

  

  r 
  

  

  Harrodsburg, 
  Indiana, 
  February 
  20, 
  1915, 
  in 
  the 
  herbarium 
  of 
  the 
  New 
  York 
  Botani- 
  

   cal 
  Garden; 
  Figs. 
  3 
  and 
  4, 
  from 
  a 
  specimen 
  collected 
  by 
  C. 
  C. 
  Haynes, 
  Highlands, 
  

   New 
  Jersey, 
  October 
  7, 
  1911/ 
  Fig. 
  5, 
  from 
  a 
  specimen 
  collected 
  by 
  A. 
  W. 
  Evans, 
  

   Orange, 
  Connecticut, 
  October, 
  1899, 
  Haynes, 
  Am. 
  Hep. 
  2; 
  Fig. 
  6, 
  from 
  a 
  specimen 
  

   collected 
  at 
  Closter. 
  New 
  Jersey^ 
  by 
  C. 
  F. 
  Austin, 
  Hep. 
  Bor.-Am. 
  141. 
  

  

  V 
  

  

  / 
  Figs. 
  7-13. 
  Riccia 
  i^irta 
  Aust. 
  

  

  Fig. 
  7. 
  Plant 
  colony, 
  drawn 
  from 
  fresh 
  material. 
  X 
  4. 
  

  

  Fig. 
  8, 
  Outline 
  of 
  cross-section 
  of 
  thallus, 
  showing 
  two 
  cilia. 
  X 
  33- 
  

  

  Fig. 
  g. 
  Portion 
  of 
  epidermal 
  layer 
  in 
  cross-section. 
  X 
  265. 
  

  

  Fig. 
  10. 
  Portion 
  of 
  epidermis 
  showing 
  two 
  cilia. 
  X 
  87. 
  

  

  Fig. 
  II. 
  Spore, 
  outer 
  face. 
  X 
  39<^. 
  

  

  Fig. 
  12. 
  Spore, 
  inner 
  faces. 
  X 
  290. 
  

  

  Fig. 
  13. 
  Outline 
  of 
  spore 
  in 
  profile 
  showing 
  papillae 
  on 
  outer 
  face, 
  represented 
  by 
  

  

  ■ 
  % 
  

  

  upper 
  side 
  of 
  figure. 
  X 
  390. 
  

  

  Fig. 
  7 
  was 
  drawn 
  from 
  a 
  specimen 
  collected 
  by 
  Annie 
  Lorenz, 
  Meridcn, 
  Connecti- 
  

   cut, 
  November 
  12, 
  1911; 
  Figs. 
  8, 
  9, 
  10, 
  and 
  ri, 
  from 
  a 
  specimen 
  collected 
  by 
  Annie 
  

   Lorenz 
  056, 
  West 
  Hartford, 
  Connecticut, 
  October 
  8, 
  1911; 
  Figs. 
  12. 
  and 
  13 
  from 
  a 
  

   specimen 
  collected 
  by 
  F, 
  V. 
  Coville, 
  Georgetown. 
  District 
  of 
  Columbia. 
  December 
  

  

  24, 
  1889. 
  

  

  Plate 
  13 
  

  

  Riccia 
  Curtisii 
  James 
  

  

  Figs, 
  i 
  and 
  2. 
  Plant* 
  colonies, 
  showing 
  archegonial 
  (larger) 
  and 
  antheridial 
  

   (smaller) 
  plants. 
  X 
  4- 
  . 
  

  

  Figs. 
  3 
  and 
  4. 
  Outlines 
  of 
  simple 
  plants, 
  showing 
  capsules. 
  X 
  4- 
  

  

  Figs. 
  5 
  and 
  6. 
  Epidermal 
  cells, 
  dotted 
  and 
  heavy. 
  lines 
  indicating 
  lamellae, 
  

   forming 
  walls 
  of 
  the 
  air-chambers. 
  X 
  240. 
  

  

  Fig. 
  7. 
  Outline 
  of 
  portion 
  of 
  thallus 
  in 
  cross 
  section. 
  X 
  4- 
  

  

  Fig. 
  8. 
  A 
  portion 
  of 
  thallus 
  in 
  cross 
  section. 
  X 
  33- 
  

  

  Fig. 
  9. 
  Spore 
  tetrad, 
  showing 
  very 
  blunt 
  papillae 
  and 
  very 
  low 
  connecting 
  

  

  basilar 
  ridges. 
  X 
  307, 
  

  

  Fig. 
  10. 
  Spore, 
  covered 
  with 
  more 
  conical 
  papillae. 
  X 
  307. 
  

  

  Figs, 
  i; 
  3, 
  s, 
  and 
  9 
  were 
  drawn 
  from 
  a 
  specimen 
  collected 
  by 
  Mary 
  Young. 
  

   Austin, 
  Texas. 
  March 
  3. 
  1914; 
  Figs. 
  2, 
  6. 
  and 
  8, 
  from 
  a 
  specimen 
  collected 
  by 
  Scverin 
  

   Rapp. 
  Sanford. 
  Florida. 
  May 
  2, 
  191 
  2; 
  Figs. 
  4 
  and 
  10, 
  from 
  a 
  specimen 
  collected 
  by 
  

   Scverin 
  Rapp, 
  Sanford, 
  Florida, 
  April 
  12, 
  1911; 
  Fig. 
  7. 
  from 
  a 
  specimen 
  collected 
  

   by 
  Severin 
  Rapp, 
  Sanford, 
  Florida, 
  December 
  12, 
  191 
  1- 
  

  

  N 
  

  

  t 
  

  

  