430 CONTRIBUTIONS FEOM THE NATIONAL HERBAEIUM. 



2. Pteryxia foeniculacea (Torr. & Gr.) Nutt. ; Coult. & Rose, Contr. Nat. Herb. 

 7: 171. 1900. 



Cymopterus foenicidaceus Torr. & Gr. Fl. 1: 624. 1840. 



Type locality: "On rocks, Blue Mountains of Oregon." Collected by Nuttall. 



Range: Eastern Oregon, eastern Washington, and adjacent Idaho. 



Specimens examined: Blue Mountains, Horner 305: Piper 2340; Tukanon River, Lake cfc 

 Hitll 535: Almota, Piper 2795; Wawawai, Elmer 770: without localit}', Vasey 309 i; Clarks 

 Springs, Spokane Count}', Kreager 119. 



Zonal dlstribution: Arid Transition and Upper Sonoran. 



HESPEROGENIA. 



1. Hesperogenia stricklandi Coult. lV; Rose, Contr. Xat. llerli. 5: 203. 1899. 

 Type locality: "Mount Rainier, Washington." Collected l)v Allen. 

 Range: Mount Rainier, Washington. 



Specimens examined: Mount Rainier, Allen 278; Fhtt, August, 1897; Sfricl-land'm 1896. 

 Zonal distribution: Iludsonian. 



OROGENIA. 



1. Orogenia linearifolia S. Wats. Bot. King. Explor. 120. /)/. L'f. fuja. 1 to 3. 1871. 



Type locality: "Damp shaded ridge of the Wahsatch, north of Parley's Park, 7,500 

 feet altitude," Utah. Collected by Watson. 



Range: From Washington and Idaho to Oregon, Utah, and southwestern Colorado. 



Specimens examined: Falcon Valley, Suksdorf in 1882; east of the Cascade Mountains, 

 Wilkes Expedition. 



SIUM. 



1. Siuni cicutaefolium Schrank, Baier. Fl. 1:558. 1798. 



Slum lineare Michx. Fl. 1 : 167. 1803. 



Sium pusillum Nutt.; Torr. & Gr. Fl. 1 : 611. 1840. 



Type locality: Not determined. 



Range: In swamps from Newfountllaud to Virginia, west to British Columbia and 

 northern California. Europe. Asia. 



Specimens examined: Sumas, Lyall in 1858-59; Seattle, Piper, September, 1892; 

 Tacoma, Flett 144, 220; Lindsley's ranch, Clarke County, Henderson 375, Trout Lake, 

 Suksdorf 185; Spokane County, Suksdorf 922; North Palouse River, Vasey, July 17, 1901; 

 Pullman, Piper; Rock Lake, Lake d' Hull 536; Toppenish, Cotton 768. 



Zonal distribution: Transition. 



COELOPLEURUM. 



Leaflets obtuse, very thick 1. C. maritimum. 



Leaflets acute or acuminate, thinner 2. C. longipes. 



1. Coelopleurum maritimum Coult. & Rose, Bot. Gaz. 13: 145. 1888. 



Type locality: "Wet ocean bluffs. Long Beach, Ilwaco (Pacific County), Wash." Col- 

 lected by Henderson. 



Range: Ocean bluff's near the mouth of the Columbia River. 

 Specimens examined: Ilwaco, Henderson, September, 1892; Piper 4995. 

 Zonal distribution: Humid Transition. 



2. Coelopleurum longipes Coult. & Rose, Contr. Nat. Herb. 7: 142. 1900. 

 Type locality: "Tide marshes near A.storia, Oregon." Collected by Howell. 

 Range: Seacoast swamps, from the Columbia River to southern Alaska. 



Specimens examined: Seattle, Piper 567; Tacoma, Piper; Union City, Piper in 1890; 

 Fairhaven, <SuA-sf/o?/1200; Hoodsport, Henderson, August 15, 1890. 

 Zonal distribution: Humid Transition. 

 Formerly confused with the more northern, larger-fruited C. gmelini (DC.) Ledeb. 



