PIPER FLORA OF THE STATE OF WASHINGTON. 413 



Range: Alaska to California and the Blue Mountains, Lake Superior. 



Specimens examined: Seattle, Piper, June, 1891; upper Valley Misqually, Allen 116; 

 near Skagit Pass, Lake & Hull 772; Stanapede Pass, Henderson, October 4, 1892; Stevens 

 Pass, Sandberg cb Leiberg 753; Yakima Pass, Watson, November 19, 1880; Blue Moun- 

 tains, Piper, July, 1896; Horner: Clallam County, Elmer 2508; Big Meadow, Kreager 424; 

 without locality, Vaseg in 1889. 



Zonal distribution: Humid Transition and Canadian. 



APIACEAE. Celery Family. 



Flowers in dense heads ; fruit scaly or tuberculate Eryngium (p. 414). 



Flowers in umbels. 



Fruit more or less bristly. 



Bristles hooked covering the whole fruit surface .... Sanictla (p. 414). 

 Bristles only on the ribs of the fruit. 



Stylopodium obsolete; bristles barbed at tip.. . Daucus (p. 415). 

 Stylopodium conical; bristles not barbed. 



Carpels oblong or ovate Caucalis (p. 416). . 



Carpels linear Washingtonia (p. 416). 



Fruit glabrous, not at all bristly. 



Carpels strongly flattened ddrsally. 



Stylopodium conical; petals obcordate Heraclel'M (p. 417). 



Stylopodium flat or obsolete. 



Calyx teeth evident; stylopodium flat Cynomarathrum (p. 417). 



Caly.x teeth obsolete or nearly so; stylo- 

 podium obsolete. 



Plant caulescent and branching: 

 flowers white. 



Ultimate segments of the leaves 



large Angelica (p. 418) . 



Ultimate segments of the leaves 



small Coniosf.li\l\m (p. 419). 



Plants acaulescent ; or, if caulescent, 

 flowers not white. 



Mostly acaulescent; lateral ribs 



thin , LoMATirM (p. 419). 



Mostly caulescent: lateral ribs 



thick Leptotaenia (p. 425). 



Carpels not dorsally flattened. 



Oil tubes present: leaves not peltate. 



Fruit with a single oil tube in each interval. 

 Stylopodium conical. 



Leaflets linear Cartm (p. 426). 



Leaflets lanceolate to ovate Ciclta (p. 426). 



Stylopodium flat or obsolete. 



Flowers yellow : leaves simple or t ri- 



foliolate Zizia (p. 427). 



Flowers white. 



Fruit elongate Leibergia (p. 427). 



Fruit short. 



Leaves decompound .... Oenantiie (p. 427). 

 Leaves reduced to hollow 



petioles Lilaeopsis (p. 428). 



Fruit with more than one oil tube in each 

 interval. 



