226 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



8. Rumex conglomeratus Murr. Prod. Fl. Goett. 52. 1770. 

 Type locality: None given, but European. 



Specimens examined: Wliidby liiland, Gardner 257 ; Seattle, Pi/>g/- 627. 



9. Rumex persicarioides L. Sp. PI. 1: 335. 1753. 

 Type locality: "In \'irginia. " 



Range: Briti.sh Columbia to New Brunswick, soutliward to California, New Mexico, and 

 Virginia. 



Specimens examined: Clallam County, £77ner 2684; Whidby Island, Gardner 256; Seat- 

 tle, Piper 714; Silver Lake, Henderson 2423; Coulee City, Henderson, July 11, 1892; Ophir, 

 Elmer in 1897; Alma, Elmer, 1897; Rock Lake, Lake & Hull 652; Alkali Lake, Sandberg cfc 

 Leiberg 411; Southbend, Spillman, Aug. 17, 1899; without locality, Cooper; Mission, 

 Kreager 484; Meyers Falls, Kreage.r 500. 



Zonal distribution: Transition. 



10. Rumex obtusifolius L. Sp. PI. 1: 335. 1753. 



Type locality: "Habitat in Germania, Helvetia, Gallia, Anglia." 



Specimens examined: Seattle, Piper in 1888. 



A common and troublesome weed in western Washington. 



Rumex acetosa L. is included in Suksdorf's list, Init we have been unable to secure any 

 evidence that it occurs in the State. 



POLYGONUM. 



Stems twining; leaves cordate. 



Outer calyx segments winged in fruit : akenes shining. ..... 1. P. duinetorum 



Outer calyx segments not winged; akenes dull 2. P. convolvulus. 



Stems not twining; leaves not cordate. 



Leaves small, usually narrow; stems wiry. 



Blades of tiie leaves jointed on the pedicels. 



Perennial with woody rootstocks; seashore plant.. 3. P. paronychia. 

 Annuals; roots fibrous. 

 Plants prostrate. 



Akenes not longer than the calyx A. P. aviculare. 



Akenes protruding from the cah'.x 5. P fovderi. 



Plants erect or ascending. 



Flowers in rather dense terminal bracteate 

 spikes. 



Bracts oblong, white-margined 6. P. pohjgaloides. 



Bracts lanceolate, green. 



Styles nearly obsolete; akenes 



brown, smooth 7. P. kelloggii. 



Styles evident; akenes lilack, 



striate 8. P. confertijlorum. 



Flowers axillary, or in loose or interrupted 

 spikes. 



Leaves rather broad, scarcely reduced 

 upward. 



Tall, branc-hed throughout; style 



3-cleft. - 9. P. erechim. 



Low alpine plant ; style 3-parted. 10. P. minimum. 

 Leaves narrow, decidedly reduced 

 upward. 



Flowers in virgate, much elon- 

 gated, loose spikes. 



