Am.  Jour.  Pharm. 
Marcli,  1898. 
As  arum  Canadense,  L. 
H7 
(5)  Bracts  broadly  ovate,  obtuse, 
more  or  less  puberulent,  approximate 
or  overlapping,  finally  loosely  spread- 
ing and  deciduous. 
(6)  Leaves,  commonly  reniform- 
cordate,  little,  if  at  all,  broader  than 
long,  with  a  deep,  often  partly  closed 
sinus,  acute  or  obtuse  at  the  apex, 
rugose  veiny,  the  hirsutulous-puber- 
ulent  upper  surface  with  a  satiny  lus- 
tre, the  lower  surface  somewhat  shin- 
ing beneath  the  close  pubesence  of 
minute  white  hairs. 
(7)  Leaves  at  first  4-7  cm.  broad  on 
petioles,  2  '5-5  cm.  long,  later  becoming 
much  larger,  and  reaching  an  extreme 
size  of  21  cm.  wide  by  19  cm.  long,  on 
petioles  32  cm.  in  length. 
(8)  Petioles  3-6  mm.  thick,  at  first 
canescent  throughout,  or  densely 
white  pubescent,  with  short,  spreading, 
or  slightly  reflexed  hairs,  becoming 
more  loosely  pubescent  or  puberulent, 
often  with  cinereous  or  somewhat 
rusty  hairs. 
(9)  Flowers  at  anthesis  usually  re- 
clining on  the  ground  on  short,  spread- 
ing or  declined  peduncles,  at  maturity 
often  erect  or  raised  on  ascending  or 
erect  peduncles  13-40  mm.  long. 
(10)  Freshly  opened  flower  about 
1  "3  cm.  long,  the  tube  of  the  cal}Tx 
about  twice  the  length  of  the  ovary, 
when  fully  grown,  often  2*5  cm.  long 
and  12-15  mm.  wide,  the  ovary  and, 
tube  of  about  equal  length. 
(11)  Upper  half  of  the  erect  calyx- 
lobes  spreading  or  ascending,  some- 
what crescentic  in  outline,  with  revolute 
margins  which  pass  into  an  upcurved 
tubular  acumination  4-8  mm.  long ; 
spread  of  the  flowers  across  the  acumi- 
nate lobes  2-3'8  cm.,  the  opening  of 
the  tube  circular. 
(5)  Bracts  narrower  and  more  acute 
than  in  Canadense,  less  pubescent, 
more  or  less  separated  or  distant,  early 
spreading  and  deciduous. 
(6)  Leaves  varying  from  reniform 
and  lunate-reniform,  with  a  shallow 
open  sinus  to  suborticular  with  a 
deep  sinus  obtusely  pointed,  broadly 
acute  or  rounded  at  the  apex,  darker 
green,  thinner  and  less  rugose  than 
in  Canadense,  commonly  nearly  glab- 
rous above  and  with  a  satiny  lustre, 
somewhat  shining  on  the  lower  sur- 
face through  the  thin  or  sometimes 
close  pubesence  of  minute  hairs. 
(7)  Leaves  commonly  10  cm.  wide 
by  8  cm.  or  less  long,  on  petioles  1.5 
dm.  long,  an  extreme  size,  1.7  dm.  wide, 
on  petioles  2  dm.  long;  at  vernation 
the  petioles  are  relatively  longer  than 
in  Canadense. 
(8)  Petioles  slender,  3-4  mm.  thick, 
loosely  or  thinly  tortuose-pubescent, 
with  sLghtly  longer  and  softer  hairs 
than  in  Canadense,  somewhat  shining 
on  the  outer  surface,  and  mostly  glab- 
rous towards  base,  except  along  the 
villous-pubescent  inner  margins,  often 
nearly  glabrous  throughout  in  age. 
( 9)  Flowers  at  anthesis  on  slender 
ascending  or  erect  peduncles,  at  ma- 
turity mostly  spreading  or  reclined  on 
peduncles  3  8-5  cm.  long. 
(10)  Flowers  smaller  than  those  of 
Canadense,  8-20  mm.  long,  7-14  mm. 
wide,  spreading  16-26  mm.  across  the 
extended  lobes,  the  tube  4-8  mm. 
high  ;  the  ovary  from  the  first  about 
the  length  of  the  calyx-tube. 
(11)  The  limb  early  reflexed,  in  age 
sometimes  ascending,  the  lobes  8-10 
mm.  long,  about  the  length  of  the 
tube,  flatfish  and  rather  brittle,  trian- 
gular in  outline,  ending  abruptly  iu  a 
straight  obtuse  point  2-4  mm.  long; 
opening  of  the  flower  conimcnlv 
more  or  less  triangular. 
