﻿Harper: 
  A 
  week 
  in 
  eastern 
  Texas 
  297 
  

  

  known 
  distribution- 
  in 
  Texas, 
  showing 
  that 
  it 
  extends 
  north 
  to 
  

   about 
  latitude 
  31"^ 
  in 
  Bell 
  County, 
  but 
  no 
  farther 
  east 
  than 
  Fayette 
  

   and 
  Lavaca 
  Counties, 
  being 
  thus 
  practically 
  confined 
  to 
  the 
  

   semi-arid 
  regions-* 
  The 
  corresponding 
  plant 
  in 
  Florida 
  is 
  con- 
  

   fined 
  to 
  the 
  peninsula, 
  mainly 
  south 
  of 
  latitude 
  30°, 
  where 
  the 
  

   average 
  annual 
  rainfall 
  exceeds 
  50 
  inches. 
  (There 
  It 
  often 
  grows 
  

   on 
  insulated 
  wires, 
  which 
  perhaps 
  it 
  does 
  not 
  do 
  in 
  Texas.) 
  The 
  

   Texas 
  plant 
  at 
  its 
  northern 
  limit 
  must 
  be 
  subject 
  to 
  much 
  colder 
  

   winter 
  weather 
  than 
  the 
  Florida 
  one, 
  too. 
  If 
  it 
  was 
  all 
  one 
  species 
  

   there 
  would 
  be 
  no 
  good 
  reason 
  apparently 
  why 
  it 
  should 
  not 
  be 
  

   found 
  also 
  in 
  Louisiana, 
  Mississippi 
  and 
  Alabama, 
  like 
  T. 
  usneoides, 
  

   with 
  which 
  it 
  is 
  often 
  intimately 
  associated. 
  This 
  seems 
  to 
  be 
  a 
  

   good 
  opportunity 
  for 
  some 
  taxonomist 
  to 
  investigate 
  and 
  make 
  a 
  

   new 
  species 
  or 
  subspecies. 
  

  

  Regional 
  descriptions 
  of 
  the 
  coastal 
  plain 
  

  

  The 
  various 
  divisions 
  of 
  the 
  coastal 
  plain, 
  whose 
  vegetation 
  

   was 
  studied 
  from 
  the 
  train, 
  will 
  now 
  be 
  taken 
  up 
  as 
  nearly 
  as 
  

   possible 
  in 
  geological 
  order, 
  beginning 
  at 
  the 
  fall-line 
  and 
  ending 
  

   at 
  the 
  coast. 
  As 
  usual 
  the 
  plants 
  listed 
  will 
  be 
  divided 
  into 
  trees, 
  

   shrubs, 
  herbs, 
  etc., 
  and 
  arranged 
  in 
  approximateorder 
  of 
  abundance 
  

   in 
  each 
  group, 
  with 
  the 
  rarer 
  species 
  omitted. 
  The 
  names 
  of 
  ever- 
  

   greens 
  (or 
  in 
  the 
  case 
  of 
  semi-evergreens 
  only 
  the 
  specific 
  names) 
  

   are 
  printed 
  in 
  heavy 
  type, 
  to 
  suggest 
  the 
  winter 
  aspect 
  of 
  the 
  

   forests, 
  and 
  those 
  of 
  weeds 
  enclosed 
  in 
  parentheses, 
  so 
  that 
  the 
  

   reader 
  who 
  may 
  wish 
  to 
  picture 
  to 
  himself 
  the 
  appearance 
  of 
  the 
  

   original 
  vegetation 
  can 
  skip 
  them. 
  

  

  F 
  

  

  The 
  black 
  prairie 
  belt 
  is 
  one 
  of 
  the 
  most 
  distinct 
  natural 
  regions 
  

   in 
  Texas, 
  and 
  it 
  has 
  been 
  delineated 
  'pretty 
  accurately 
  on 
  quite 
  a 
  

  

  erw 
  

  

  pond 
  

  

  the 
  area 
  of 
  outcropping 
  of 
  certain 
  upper 
  Cretaceous 
  limestones, 
  

   plus 
  a 
  strip, 
  a 
  few 
  miles 
  wicle 
  at 
  the 
  eastern 
  edge, 
  of 
  the 
  lowest 
  

   Eocene 
  strata 
  (Midway 
  formation), 
  which 
  is 
  equally 
  calcareous 
  

   and 
  has 
  very 
  similar 
  soils 
  except 
  for 
  being 
  perhaps 
  a 
  little 
  more 
  

   rocky. 
  (This 
  strip 
  has 
  been 
  designated 
  by 
  Hil 
  l 
  and 
  Deussen 
  as 
  

  

  This 
  is 
  commented 
  on 
  by 
  Miss 
  Birge 
  on 
  page 
  8 
  of 
  her 
  paper 
  as 
  follows: 
  "It 
  is 
  

   quite 
  evident 
  that 
  Tillandsia 
  recurvata 
  demands 
  a 
  semi-aridj 
  rather 
  than 
  a 
  swampy 
  

   environment 
  to 
  which 
  Small 
  in 
  his 
  Flora 
  of 
  the 
  Soulheaslern 
  United 
  States 
  entirely 
  

   confines 
  it." 
  

  

  