1900. No. 8. VASCULAR PLANTS COLLECTED IN ARCTIC NORTH AMERICA. 59 
all the fruit wings are almost alike, the lateral not being considerably 
broader than the dorsal. The fruit — at least the immature one — is 
not dorsally flattened as in Conioselinum. The petals are broadly obovate 
or obcordate, emarginate and with infolded tips. The linear-oblong or ovate- 
oblong membranous involucel leaves with long, abruptly limited attenuation 
are very characteristic for the species and are laid strees upon both by 
TURCZANINOW and by CoULTER & Rose. 
Bupleurum L. 
82. Bupleurum americanum COULTER & Ross, Revis. N. Am. Umbellif., 
Indiana, 1888, p. 115, fig. 17; Contr. Nat. Herb., VII, 1900, p. 85; B. ranun- 
culoides Hooker, Fl. Bor. Am., I, 1834, p. 277; KJELLMAN, Vega Exp. 
Vetensk. Arbeten, II, 1883, p. 43. 
Herschell Isl. A small fragment of a flowering plant (July 
17th, 1906). 
Pirolaceae. 
Pirola L. 
83. Pirola rotundifolia L., var. grandiflora (Rap1vs) D. C., Prodromus, 
VII, 1840, p. 773; cfr. OSTENFELD, in Medd. om Grönland, XXXIII, 1905, 
p. 65. 
? P. rotundifolia, PuLzen’s list, Point Barrow to Great Slave Lake; Richard's Isl. 
King Point. In full bloom on July 4th, 1906, in young buds 
on June 17th, 1906. 
Ericaceae. 
Ledum L. 
84. Ledum palustre L., var. decumbens Aır., Hort. Kew., vol. 2, 
1789, p. 65. 
L. palustre, PULLEN’s list, Point Barrow to Mackenzie River; Richard’s Isl. 
King Point. Begins to flower about on 1st July (in buds on 
June 28th, in bloom on July 7th, 1906). 
The King Point specimens are quite like the Greenland ones. 
Empty ripe fruits from the foregoing year are present on the flowe- 
ring specimens. 
Cassiope D. Don. 
85. Cassiope tetragona (L.) Don, Edinb. New Phil. Journ., vol. 17, 
1834, p. 158. 
Puuuen's list, Point Barrow to Mackenzie River; Garry Isl. 
King Point. In full bloom about July 1st, 1906. 
