﻿68 
  KEY 
  AND 
  FLORA 
  

  

  23. 
  LORANTHACEJE. 
  MISTLETOE 
  FAMILY 
  

  

  Parasitic 
  shrubs 
  or 
  herbs, 
  leaves 
  opposite, 
  leathery, 
  without 
  

   stipules. 
  Flowers 
  monoecious 
  or'dicecious, 
  clustered 
  or 
  solitary 
  ; 
  

   perianth 
  of 
  both 
  calyx 
  and 
  corolla, 
  or 
  of 
  a 
  calyx 
  only, 
  or 
  some- 
  

   times 
  wanting, 
  the 
  limb 
  epigynous 
  ; 
  sepals 
  2-8. 
  Stamens 
  as 
  

   many 
  as 
  the 
  sepals, 
  and 
  opposite 
  them. 
  Ovary 
  1-celled 
  ; 
  ovule 
  1. 
  

  

  Fruit 
  a 
  berry.* 
  

  

  PHORADENDRON 
  Nutt. 
  

  

  Evergreen, 
  shrubby 
  plants, 
  parasitic 
  on 
  trees 
  ; 
  branches 
  

   greenish, 
  jointed, 
  and 
  very 
  brittle. 
  Leaves 
  leathery. 
  Flowers 
  

   dioecious, 
  in 
  short 
  jointed 
  spikes. 
  Staminate 
  flowers 
  globular, 
  

   calyx 
  2-4-lobed, 
  stamens 
  sessile 
  at 
  the 
  base 
  of 
  the 
  lobes, 
  

   anthers 
  transversely 
  2-celled. 
  Stigma 
  sessile. 
  Berry 
  1-seeded.* 
  

  

  1. 
  P. 
  flavescens 
  Ntitt. 
  AMERICAN 
  MISTLETOE. 
  Very 
  round, 
  bushy; 
  

   branches 
  very 
  brittle 
  at 
  the 
  joints, 
  opposite 
  or 
  whorled, 
  6 
  in. 
  to 
  2 
  ft. 
  

   long. 
  Leaves 
  flat, 
  leathery, 
  or 
  somewhat 
  fleshy, 
  nearly 
  veinless, 
  obo- 
  

   vate, 
  entire, 
  with 
  short 
  petioles. 
  Flowering 
  spikes 
  solitary 
  or 
  2-3 
  

   together 
  in 
  the 
  axils 
  of 
  the 
  leaves. 
  Berry 
  roundish, 
  white, 
  glutinous. 
  

   Parasitic 
  on 
  many 
  deciduous 
  trees.* 
  

  

  24. 
  ARISTOLOCHIACEJE. 
  DUTCHMAN'S 
  PIPE 
  FAMILY 
  

  

  Herbaceous 
  plants, 
  apparently 
  stemless 
  or 
  with 
  twining 
  and 
  

   leafy 
  stems. 
  Leaves 
  alternate, 
  without 
  stipules, 
  petioled, 
  

   mostly 
  roundish 
  or 
  kidney-shaped. 
  Flowers 
  axillary, 
  solitary 
  

   or 
  clustered, 
  bisexual. 
  Calyx 
  tubular, 
  3- 
  or 
  6-lobed, 
  usually 
  

   colored. 
  Petals 
  none. 
  Stamens 
  6-12, 
  epigynous. 
  Pistil 
  1 
  ; 
  

   ovary 
  mostly 
  6-celled, 
  many-seeded.* 
  

  

  I. 
  ASARUM 
  L. 
  

  

  Perennial, 
  apparently 
  stemless, 
  aromatic 
  herbs, 
  with 
  slen- 
  

   der, 
  branching 
  rootstocks. 
  Leaves 
  long-petioled, 
  from 
  kidney- 
  

   shaped 
  to 
  halberd-shaped. 
  Flowers 
  axillary, 
  peduncled. 
  Calyx 
  

   actinomorphic, 
  3-lobed, 
  withering-persistent. 
  Stamens 
  12, 
  the 
  

   filaments 
  partially 
  united 
  with 
  the 
  style 
  and 
  usually 
  prolonged 
  

   beyond 
  the 
  anthers. 
  Ovary 
  6-celled, 
  with 
  parietal 
  placentae, 
  

   many-seeded. 
  Mature 
  capsule 
  roundish, 
  often 
  somewhat 
  fleshy.* 
  

  

  