﻿62 
  KEY 
  AND 
  FLORA 
  

  

  sparingly 
  cut-toothed. 
  Cup 
  top-shaped, 
  with 
  coarse 
  scales, 
  inclosing 
  

   about 
  half 
  the 
  nearly 
  round 
  acorn. 
  Common 
  in 
  dry 
  woods. 
  Foliage 
  

   quite 
  variable 
  in 
  outline 
  and 
  lobing 
  ; 
  bark 
  valuable 
  for 
  tanning.* 
  

  

  11. 
  Q. 
  nigra 
  L. 
  BLACK-JACK 
  OAK. 
  A 
  small 
  tree; 
  leaves 
  obovate, 
  

   usually 
  with 
  three 
  rounded 
  lobes 
  at 
  the 
  apex, 
  the 
  lobes 
  bristle-pointed, 
  

   rounded, 
  or 
  slightly 
  cordate 
  at 
  the 
  base, 
  rusty-pubescent 
  beneath, 
  

   shining 
  above, 
  coriaceous, 
  short-petioled 
  ; 
  cup 
  top-shaped, 
  short- 
  

   peduncled, 
  with 
  coarse 
  and 
  truncate 
  scales, 
  inclosing 
  about 
  one 
  

   third 
  of 
  the 
  oblong-ovate 
  acorn. 
  An 
  almost 
  worthless 
  tree, 
  its 
  

   presence 
  indicating 
  a 
  thin 
  and 
  sterile 
  soil.* 
  

  

  12. 
  Q. 
  phellos 
  L. 
  WILLOW 
  OAK. 
  A 
  tree 
  of 
  medium 
  size, 
  leaves 
  

   lanceolate 
  or 
  elliptical, 
  scurfy 
  when 
  young 
  and 
  becoming 
  smooth 
  

   with 
  age, 
  very 
  short-petioled 
  ; 
  cup 
  shallow, 
  sessile 
  ; 
  acorn 
  subglobose. 
  

   Wet 
  soil. 
  Often 
  planted 
  for 
  shade.* 
  

  

  19. 
  ULMACEJE. 
  ELM 
  FAMILY 
  

  

  Trees 
  or 
  shrubs 
  with 
  watery 
  juice 
  ; 
  alternate, 
  simple, 
  petio- 
  

   late, 
  serrate, 
  stipulate 
  leaves, 
  which 
  are 
  usually 
  2-ranked 
  ; 
  and 
  

   small, 
  bisexual, 
  or 
  somewhat 
  monoecious, 
  apetalous 
  flowers. 
  

   Calyx 
  of 
  3-9 
  sepals, 
  which 
  are 
  distinct 
  or 
  partly 
  united 
  ; 
  

   stamens 
  as 
  many 
  as 
  the 
  sepals 
  and 
  opposite 
  them. 
  Ovary 
  

   1-2-celled 
  ; 
  styles 
  2, 
  spreading. 
  Fruit 
  a 
  key, 
  nut, 
  or 
  drupe.* 
  

  

  I. 
  ULMUS 
  L. 
  

  

  Trees 
  with 
  straight-veined, 
  unsymmetrical, 
  doubly 
  serrate 
  

   leaves 
  ; 
  stipules 
  early 
  deciduous. 
  Flowers 
  bisexual 
  ; 
  calyx 
  

   bell-shaped, 
  4-9-cleft. 
  Stamens 
  slender, 
  protruding. 
  Ovary 
  

   compressed 
  ; 
  styles 
  2, 
  spreading. 
  Fruit 
  membranaceous, 
  flat, 
  

   winged 
  on 
  the 
  edge.* 
  

  

  1. 
  U. 
  fulva 
  Michx. 
  SLIPPERY 
  ELM. 
  A 
  tree 
  of 
  medium 
  size, 
  with 
  

   rough, 
  downy 
  twigs, 
  and 
  rusty, 
  densely 
  woolly 
  bud 
  scales. 
  Leaves 
  

   large, 
  thick, 
  very 
  rough 
  above, 
  downy 
  beneath, 
  ovate 
  or 
  obovate, 
  taper- 
  

   pointed 
  at 
  the 
  apex, 
  unsymmetrical, 
  obtuse 
  or 
  somewhat 
  cordate 
  at 
  

   the 
  base, 
  coarsely 
  and 
  doubly 
  serrate 
  ; 
  calyx 
  lobes 
  and 
  pedicels 
  downy. 
  

   Fruit 
  broadly 
  oval, 
  downy 
  over 
  the 
  seed, 
  the 
  wing 
  smooth. 
  Inner 
  

   bark 
  very 
  fragrant 
  when 
  dried, 
  and 
  a 
  popular 
  domestic 
  remedy.* 
  

  

  2. 
  U. 
  campestris 
  L. 
  ENGLISH 
  ELM. 
  A 
  large 
  tree, 
  with 
  short, 
  

   rather 
  upright 
  or 
  ascending 
  branches. 
  Leaves 
  not 
  bilaterally 
  sym- 
  

   metrical, 
  oval, 
  acute 
  or 
  sometimes 
  a 
  little 
  taper-pointed, 
  doubly 
  

  

  