﻿140 
  COLLECTIONS 
  TOWARDS 
  

  

  1. 
  Astidivm 
  acrostichoides. 
  2. 
  A.marginak. 
  3. 
  A. 
  Filix 
  femina. 
  

  

  1. 
  Asplenium 
  rhizophyllum. 
  2. 
  A. 
  angustifolium. 
  3. 
  A. 
  ebe- 
  

   neum. 
  4. 
  A. 
  melanocaulon. 
  5. 
  A. 
  Ruta 
  muraria. 
  

  

  Pteris 
  aquilina. 
  

  

  Wood 
  ward 
  ia 
  virginica. 
  

  

  Adiantum 
  pedatum. 
  — 
  Hab. 
  Near 
  the 
  Petit 
  Gulf 
  on 
  the 
  banks 
  of 
  

   the 
  Mississippi. 
  

  

  Cheilanthes 
  vestita. 
  — 
  Common. 
  

  

  PlLULARIA. 
  

  

  Marsilea 
  * 
  Remotely 
  allied 
  to 
  the 
  Ferns. 
  Natural 
  affinity 
  un- 
  

   known. 
  

  

  Azolla 
  Americana. 
  

  

  Equiset 
  cm 
  hyemale. 
  — 
  Hab. 
  Forming 
  extensive 
  and 
  exclusive 
  fields 
  

   on 
  the 
  banks 
  of 
  the 
  Ohio, 
  Missouri, 
  Mississippi 
  and 
  Arkansas 
  rivers. 
  

  

  Chara 
  vulgaris. 
  

  

  PH^NOGAMIA. 
  

  

  Or 
  Seminifera. 
  Germinal 
  rudiments 
  and 
  succeeding 
  vegetation 
  

   dissimilar; 
  sexual 
  organs 
  and 
  flowers 
  conspicuous. 
  

  

  ACOTYLEDONES. 
  

  

  NAIADES. 
  

  

  1 
  . 
  Lemna 
  minor. 
  2, 
  L. 
  polyrhiza. 
  

  

  1. 
  Caleitriche 
  verna. 
  

  

  2. 
  C. 
  *pedunculosa, 
  foliis 
  omnibus 
  ellipticis, 
  enerviis 
  ; 
  fructibus 
  

   pedunculatis, 
  declinatis. 
  — 
  Hab. 
  (In 
  depressed 
  situations, 
  and 
  on 
  the 
  

   margin 
  of 
  ponds, 
  attached 
  to 
  the 
  ground) 
  from 
  Arkansas 
  to 
  the 
  Pottoe, 
  

   &c 
  — 
  Obs. 
  Leaves 
  cuneate-elliptic, 
  thickish 
  and 
  covered 
  with 
  impressed 
  

   punctures 
  ; 
  flowers 
  axillary 
  and 
  opposite, 
  monoicous, 
  one 
  of 
  them 
  

   staminiferous 
  ; 
  calix 
  and 
  corolla 
  none 
  ? 
  (at 
  least 
  I 
  could 
  not 
  discover 
  

   any) 
  ; 
  stamens 
  not 
  exserted 
  ; 
  styles 
  two, 
  for 
  a 
  while 
  persistent 
  on 
  the 
  

   summit 
  of 
  the 
  pedunculated 
  fruit; 
  seeds 
  four, 
  compressed; 
  time 
  of 
  

   flowering, 
  February. 
  

  

  