1887. | BOTANICAL GAZETTE. 75 
oil-ducts small or sometimes large, 4-6 on commissural side 
(figs. 35, 36) Archemora rigida DC.—New York to Minne- 
sota and south to the Gulf. FI. August. 
PEUCEDANUM L.—Fruit roundish to oblong, much 
flattened dorsally : carpels with 5 primary ribs; dorsal and 
intermediate filiform and approximate ; lateral extended into 
I. P. nudieaule Nutt. Torr. & Gray, Fl.i.627. Low, nearly 
acaulescent, pubescent : leaves much dissected : flowers white : 
fruit nearly round, 2~3 lines broad ; oil-ducts small, solitary 
im the intervals, 2-4 on the commissural side.—Minnesota to 
Towa and westward. FI. in earliest spring. 
PASTINACA L.—Fruit oval, very much flattened dor- 
Sally : Carpels with 5 primary ribs; dorsal and intermediate 
