﻿1890.] 
  BOTANICAL 
  GAZETTE. 
  " 
  343 
  

  

  Professor 
  Lester 
  F. 
  Ward 
  has 
  an 
  interesting 
  paper 
  on 
  the 
  origin 
  

   of 
  plane 
  trees 
  (reprint 
  from 
  Amer. 
  Nat, 
  Sept. 
  1890), 
  being 
  chiefly 
  a 
  dis- 
  

   oussioa, 
  from 
  an 
  American 
  stand-point, 
  of 
  Johann 
  Janko'a 
  recent 
  paper 
  

   ("Abstammung 
  der 
  Platanen 
  ") 
  in 
  Engler's 
  Botanische 
  Jahrb'dcher. 
  Pro- 
  

   fessor 
  Ward 
  considers 
  the 
  genus 
  Platanus 
  the 
  last 
  of 
  a 
  long 
  line 
  of 
  ances- 
  

   try 
  that 
  was 
  once 
  far 
  more 
  abundant 
  than 
  at 
  present, 
  as 
  is 
  also 
  true 
  of 
  

   Liquidambar, 
  Liriodendron, 
  Sequoia, 
  and 
  Ginkgo. 
  One 
  of 
  the 
  distinctive 
  

   links 
  in 
  the 
  chain 
  of 
  evidence 
  in 
  tracing 
  the 
  ancestry 
  of 
  Platanus 
  proves 
  

   to 
  be 
  the 
  basal 
  lobes 
  of 
  the 
  leaf. 
  The 
  author 
  revises 
  the 
  geological 
  distri. 
  

   bution 
  of 
  the 
  fossil 
  species 
  of 
  Platanus 
  as 
  given 
  by 
  Professor 
  Janko. 
  

  

  The 
  Proceedings 
  of 
  the 
  National 
  Museum, 
  vol. 
  xiii, 
  contains 
  a 
  list 
  of 
  

   plants 
  collected 
  in 
  1SS9 
  at 
  Socorro 
  and 
  Clarion 
  Islands 
  of 
  the 
  Pacific 
  by 
  

   the 
  ornithologist 
  (Mr. 
  Chas. 
  H. 
  Townsend) 
  of 
  the 
  Albatross 
  expedition 
  

   The 
  islands 
  are 
  southwest 
  from 
  Lower 
  California, 
  and 
  should 
  be 
  of 
  great 
  

   botanical 
  interest. 
  Mr. 
  Townsend 
  should 
  be 
  commended 
  for 
  securing 
  

   this 
  botanical 
  material 
  in 
  addition 
  to 
  his 
  regular 
  duties. 
  The 
  flora, 
  as 
  is 
  

   to 
  be 
  expected, 
  is 
  similar 
  to 
  that 
  of 
  Mexico. 
  The 
  plants 
  were 
  determined 
  

  

  by 
  Dr. 
  Geo. 
  Vasey 
  and 
  J. 
  N. 
  Rose, 
  of 
  the 
  Department 
  of 
  Agriculture, 
  the 
  

   total 
  number 
  of 
  species 
  being 
  26, 
  18 
  of 
  them 
  being 
  found 
  on 
  Socorro 
  and 
  

   12 
  on 
  Clarion, 
  among 
  them 
  3 
  new 
  species 
  and 
  a 
  variety. 
  

  

  The 
  third 
  Contribution 
  from 
  the 
  U. 
  S. 
  National 
  Herbarium 
  (dated 
  

   Nov. 
  1, 
  1890,) 
  contains 
  the 
  results 
  of 
  a 
  study 
  of 
  collections 
  of 
  plants 
  made 
  

   by 
  Dr. 
  Edward 
  Palmer 
  in 
  1890 
  in 
  Lower 
  California 
  and 
  western 
  Mexico, 
  

   at 
  La 
  Paz, 
  San 
  Pedro 
  Martin 
  Island, 
  Raza 
  Island, 
  Santa 
  Rosalia 
  and 
  SanU 
  

   Agueda, 
  and 
  Guaymas. 
  The 
  work 
  has 
  been 
  chiefly 
  done 
  by 
  Mr. 
  J. 
  N. 
  

   Rose, 
  under 
  the 
  direction 
  of 
  Dr. 
  George 
  Vasey. 
  New 
  species 
  are 
  numer- 
  

   ous, 
  as 
  is 
  to 
  be 
  expected 
  from 
  such 
  unexplored 
  regions 
  and 
  such 
  a 
  col- 
  

   lector. 
  Among 
  the 
  new 
  things 
  from 
  La 
  Paz 
  is 
  a 
  very 
  curious 
  genus 
  of 
  

   «omposit£e, 
  dedicated 
  to 
  John 
  M. 
  Coulter, 
  and 
  called 
  Coulterella. 
  Ibe 
  

   plate 
  shows 
  it 
  to 
  be 
  a 
  shrubby 
  plant, 
  with 
  usually 
  a 
  solitary 
  flower 
  in 
  the 
  

   beads, 
  whose 
  achene 
  is 
  permanently 
  enclosed 
  by 
  a 
  3-winged 
  spongy 
  in- 
  

   volucre. 
  About 
  25 
  new 
  species 
  are 
  described, 
  including 
  a 
  new 
  Euphor- 
  

   bia 
  by 
  Dr. 
  Millspaugh. 
  

  

  The 
  first 
  memoir 
  of 
  the 
  second 
  volume 
  of 
  the 
  Torrey 
  Club 
  Memoirs 
  

   18 
  by 
  Dr. 
  B. 
  D. 
  Halsted, 
  on 
  « 
  reserve 
  food-materials 
  in 
  buds 
  and 
  surrouno. 
  

   wg 
  parts." 
  There 
  are 
  two 
  plates, 
  and 
  the 
  author 
  states 
  his 
  purpose 
  to 
  De 
  

   "to 
  consider 
  the 
  structure 
  and 
  reserve 
  food 
  contents 
  of 
  the 
  buds 
  ana 
  su 
  - 
  

   rounding 
  parts 
  in 
  some 
  of 
  our 
  trees 
  and 
  shrubs, 
  with 
  occasional 
  reference 
  

   to 
  nourishing 
  substances 
  as 
  stored 
  in 
  other 
  parts 
  of 
  perennial 
  plants. 
  

   Particular 
  attention 
  is 
  paid 
  to 
  starch; 
  and 
  it 
  is 
  suggested 
  that 
  spines, 
  

   addition 
  to 
  being 
  defensive 
  structures, 
  may 
  also 
  act 
  aa 
  food 
  reservoir 
  ■ 
  

   ^ 
  Dr. 
  George 
  Vasey 
  has 
  just 
  issued 
  the 
  first 
  part 
  of 
  " 
  Grasses 
  of 
  t 
  e 
  

   Southwest," 
  being 
  plates 
  and 
  descriptions 
  of 
  the 
  grasses 
  of 
  the 
  de^ 
  

   region 
  of 
  W. 
  TfiT«« 
  W.w 
  M..\rn. 
  Arizona, 
  and 
  S. 
  California. 
  B 
  is 
  

  

  k 
  

  

  