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 Nisqually, Allen 116; 

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

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

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

 without locality, Vasey in 1889. 



Zonal distribution: Humid Transition and Canadian. 



APIACEAE. Celery Family. 



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



Flowers in umbels. 



Fruit more or less bristly. 



Bristles hooked covering the whole fruit surface. Sanicula (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 dorsally. 



Stylopodium conical; petals obcordate. ^. . Heracleum (p. 417). 



Stylopodium flat or obsolete. 



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



Calyx 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 Conioselinum (p. 419). 



Plants acaulescent; or, if caulescent, 

 flowers not white. 



Mostly acaulescent; lateral ribs 



thin '. Lomatium (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 '. . Carum (p. 426). 



Leaflets lanceolate to ovate Cicuta (p. 426). 



Stylopodium flat or obsolete. 



Flowers yellow; leaves simple or tri- 



foliolate Zizia (p. 427). 



Flowers white. 



Fruit elongate Leiberg ia (p. 427). 



Fruit short. 



Leaves decompound .... Oenanthe (p. 427). 

 Leaves reduced to hollow 



petioles Lilaeopsis (p. 428). 



Fruit with more than one oil tube in each 

 « interval. 



