﻿1890.] 
  

  

  BOTANICAL 
  GAZETTE. 
  

  

  65 
  

  

  Astragalus 
  reventus 
  Gra}^— 
  Another 
  species 
  new 
  to 
  Mon- 
  

   tana 
  and 
  only 
  known 
  from 
  Oregon 
  and 
  Washington. 
  Col- 
  

   lected 
  by 
  Mr. 
  Tweedy, 
  June, 
  1888, 
  Beaver 
  Head 
  county, 
  

   Montana. 
  . 
  ■ 
  ^ 
  

  

  Erigeron 
  Tweedyaua 
  Canby 
  & 
  Rose, 
  n. 
  sp.— 
  Perennial, 
  

  

  from 
  a 
  muliicipital 
  caudex 
  4 
  to 
  8 
  inches 
  high, 
  simple 
  or 
  some- 
  

   what 
  branched, 
  soft 
  pubescent 
  below, 
  becoming 
  lanate 
  above 
  

   (apparently 
  densely 
  white 
  lanate 
  when 
  young) 
  : 
  leaves 
  nar- 
  

   rowly 
  linear, 
  2 
  to 
  2^ 
  inches 
  long, 
  crowded 
  at 
  base, 
  reduced 
  

   and 
  scattered 
  above, 
  somewhat 
  pubescent 
  : 
  heads 
  3 
  to 
  5 
  lines, 
  

   high, 
  a 
  little 
  broader, 
  terminating 
  simple 
  stems 
  on 
  the 
  

   branches 
  ; 
  the 
  peduncles 
  long 
  and 
  naked 
  or 
  with 
  few 
  bract- 
  

   like 
  leaves 
  : 
  involucre 
  of 
  numerous 
  narrow 
  acuminate 
  bracts, 
  

   in 
  a 
  single 
  rather 
  crowded 
  series, 
  with 
  tips 
  a 
  little 
  spreading, 
  

   densely 
  lanate: 
  rays 
  numerous, 
  conspicuous, 
  white: 
  pappus 
  

   double, 
  the 
  outer 
  multisquamellate 
  : 
  akenes 
  pubescent. 
  

  

  county, 
  M 
  

  

  Mr. 
  Frank 
  Tweedy, 
  J 
  

  

  1888, 
  in 
  Park 
  

  

  Here 
  probably 
  should 
  be 
  referred 
  F. 
  L. 
  Scribner's 
  no. 
  77, 
  

  

  Mount 
  

  

  12, 
  

  

  1883, 
  altitude 
  7,500 
  feet. 
  The 
  lanate 
  pubesence 
  of 
  the 
  in- 
  

   volucre 
  and 
  double 
  pappus 
  seems 
  to 
  ally 
  this 
  species 
  with 
  

  

  Mu 
  

  

  far 
  north. 
  It 
  is 
  closely 
  related 
  to 
  E. 
  pumi- 
  

   lus, 
  but 
  with 
  larger 
  heads, 
  softer 
  pubescence, 
  etc. 
  Its 
  closest 
  

   alliance, 
  however, 
  is 
  probabl}^ 
  with 
  E. 
  Brandegei 
  of 
  Colorado, 
  

   but 
  a 
  careful 
  comparison 
  with 
  specimens 
  in 
  the 
  Gray 
  Her- 
  

   barium, 
  and 
  a 
  good 
  specimen 
  communicated 
  by 
  Mr. 
  Bran- 
  

   degee, 
  show 
  that 
  the 
  two 
  are 
  distinct. 
  E, 
  

   smaller 
  almost 
  globular 
  heads, 
  very 
  short 
  almost 
  naked 
  bracts 
  

  

  Brandeiiei 
  

  

  has 
  

  

  (even 
  in 
  flowers), 
  etc. 
  E 
  

  

  E 
  

  

  is 
  evidently 
  onl^^ 
  

  

  ^ 
  Erigeron 
  Parryi 
  Canby 
  & 
  Rose, 
  n. 
  sp. 
  A 
  somewhat 
  simi- 
  

   lar 
  species 
  but 
  depressed, 
  one 
  to 
  two 
  inches 
  high, 
  pubescence 
  

   villous, 
  spreading: 
  heads 
  solitary 
  on 
  the 
  stems 
  (in 
  one 
  case 
  

   ,two 
  heads), 
  3 
  lines 
  high: 
  rays 
  40 
  to 
  50, 
  white, 
  short 
  and 
  

   rather 
  broad, 
  3-dentate 
  at 
  tip: 
  involucral 
  scales 
  tapering 
  to 
  

   a 
  sharp 
  point, 
  purplish 
  at 
  tip 
  : 
  pappus 
  double, 
  the 
  outer 
  short, 
  

   the 
  bristles 
  as 
  thick 
  as 
  those 
  of 
  the 
  inner. 
  

  

  Dry 
  hills, 
  7,000 
  feet 
  altitude, 
  on 
  Grasshopper 
  Creek, 
  

  

  15). 
  

  

  Montana, 
  July 
  

  

  iF^ 
  

  

  Tweedy 
  

  

  Near 
  E. 
  pumilus 
  and 
  also 
  near 
  E. 
  radicatus, 
  difleiing 
  

  

  