﻿iSpO.j 
  BOTANICAL 
  GAZETTE. 
  I^ 
  

  

  A 
  new 
  genus 
  of 
  TImbelli 
  ferae. 
  

  

  JOHN 
  M. 
  COULTER 
  AND 
  J. 
  N. 
  ROSE. 
  

  

  (with 
  plate 
  II.) 
  

  

  From 
  the 
  interesting 
  collections 
  made 
  in 
  Guatemala 
  under 
  

   the 
  direction 
  of 
  Mr. 
  John 
  Donnell 
  Smith 
  an 
  Umbellifer 
  was 
  

   sent 
  to 
  us 
  for 
  determination, 
  which 
  proves 
  to 
  be 
  the 
  type 
  of 
  

   a 
  new 
  genus. 
  We 
  take 
  pleasure 
  in 
  dedicating 
  it 
  to 
  Mr. 
  

   Smith, 
  whose 
  name 
  should 
  be 
  prominently 
  connected 
  with 
  

   the 
  Guatemalan 
  flora. 
  

  

  DONNELLSMITHIA. 
  — 
  Calyx-teeth 
  obsolete. 
  Fruit 
  

   roundish-ovate, 
  glabrous, 
  strongly 
  flattened 
  laterally. 
  Car- 
  

   pel 
  flattened 
  laterally, 
  with 
  equal 
  filiform 
  ribs, 
  the 
  intermedi- 
  

   ates 
  distant 
  from 
  the 
  laterals, 
  and 
  a 
  thin 
  pericarp 
  with 
  no 
  

   strengthening 
  cells 
  (or 
  the 
  merest 
  trace). 
  Stylopodium 
  

   wanting. 
  Oil-tubes 
  numerous, 
  rather 
  large, 
  almost 
  contigu- 
  

   ous 
  about 
  the 
  carpel, 
  those 
  of 
  the 
  commissural 
  face 
  more 
  

   crowded 
  and 
  often 
  larger. 
  Seed 
  invested 
  by 
  an 
  oil-secret- 
  

   ing 
  layer 
  which 
  may 
  develop 
  small 
  tubes, 
  especially 
  in 
  the 
  

   commissural 
  region, 
  the 
  face 
  with 
  a 
  deep 
  and 
  narrow 
  sulcus. 
  

   Slender 
  glabrous 
  perennial, 
  from 
  rather 
  slender 
  elongated 
  

   roots, 
  with 
  ternately 
  compound 
  leaves, 
  narrow 
  mostlj' 
  entire 
  

   leaflets, 
  with 
  involucre 
  mostly 
  present 
  and 
  no 
  involucels, 
  and 
  

   yellow 
  flowers 
  in 
  widely 
  spreading 
  loose 
  umbels 
  which 
  are 
  

   long-peduncled 
  or 
  sessile. 
  

  

  ^ 
  D. 
  Gnatemalensis. 
  Glaucous 
  : 
  stem 
  erect, 
  simple 
  or 
  

   branched, 
  8 
  to 
  30 
  in. 
  high: 
  leaves 
  mostly 
  near 
  the 
  base, 
  

   long-petioled, 
  twice 
  or 
  thrice 
  ternate, 
  with 
  lanceolate 
  to 
  ob- 
  

   long 
  leaflets 
  (i^ 
  to 
  2 
  in. 
  long, 
  3 
  to 
  6 
  lines 
  broad), 
  mostly 
  en- 
  

   tire 
  and 
  with 
  revolute 
  callous 
  margin 
  : 
  umbels 
  on 
  long 
  di- 
  

   vergent 
  slender 
  peduncles 
  or 
  the 
  latter 
  often 
  sessile, 
  5 
  or 
  6- 
  

   rayed, 
  wdth 
  involucre 
  mostly 
  present 
  and 
  of 
  3 
  or 
  4 
  trifid 
  

   bracts 
  ; 
  rays 
  i 
  to 
  2 
  in. 
  long 
  ; 
  pedicels 
  2 
  to 
  3 
  lines 
  long 
  : 
  fruit 
  

  

  Ros 
  

  

  i 
  

  

  altitude, 
  July, 
  1887 
  (no. 
  131 
  1 
  ex. 
  PI. 
  Guat. 
  Tuerckh., 
  qu. 
  

   edid. 
  John 
  Donnell 
  Smith). 
  

  

  The 
  new 
  genus 
  is 
  probably 
  most 
  nearly 
  related 
  to 
  Eulo- 
  

   phus, 
  from 
  which 
  it 
  differs 
  not 
  only 
  in 
  its 
  root 
  and 
  leaf 
  char- 
  

   acters, 
  but 
  chiefly 
  in 
  its 
  fruit 
  and 
  carpels 
  being 
  strongly 
  lat- 
  

   erally 
  flattened, 
  its 
  seed-face 
  having 
  a 
  deep 
  and 
  narrow 
  sul- 
  

  

  