226 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
8. Rumex conglomeratus Murr. Prod. Fl. Goett. 52. 1770. 
Type LocaLity: None given, but European. 
SPECIMENS EXAMINED: Whidby Island, Gardner 257; Seattle, Piper 627. 
9. Rumex persicarioides L. Sp. Pl. 1: 335. 1753. 
Type Locauity: “In Virginia.” 
Rance: British Columbia to New Brunswick, southward to California, New Mexico, and 
Virginia. 
SPECIMENS EXAMINED: Clallam County, Elmer 2684; Whidby Island, Gardner 256; Seat- 
tle, Piper 714; Silver Lake, Henderson 2423; Coulee City, /enderson, July 11, 1892; Ophir, 
Elmer in 1897; Alma, Elmer, 1897; Rock Lake, Lake & Hull 652; Alkali Lake, Sandberg & 
Leiberg 411; Southbend, Spillman, Aug. 17, 1899; without locality, Cooper; Mission, 
Kreager 484; Meyers Falls, Kreager 500. 
ZONAL DISTRIBUTION: Transition. 
10. Rumex obtusifolius L. Sp. Pl. 1: 335. 1753. 
Tyree Locatiry: “ 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, but 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. dumetorum 
Outer calyx segments not winged; akenes dull.........._.- 2. P. convolvulus. 
Stems not twining; leaves not cordate. 
Leaves small, usually narrow; stems wiry. 
Blades of the 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.......- 4. P. aviculare. 
Akenes protruding from the calyx... .. - 5. P. fowleri. 
Plants erect or ascending. 
Flowers in rather dense terminal bracteate 
spikes. 
Bracts oblong, white-margined Leeeee 6. P. polygaloides. 
Bracts lanceolate, green. 
Styles nearly obsolete; akenes 
brown, smooth ._....... 2... - 7. P. kelloggit. 
Styles evident; akenes black, 
striate... .... eee ee eee eee eee 8. P. confertiflorum. 
Flowers axillary, or in loose or interrupted 
spikes. . 
Leaves rather broad, scarcely reduced 
upward. 
Tall, branched throughout; style 
3-cleft..... 2.2... . 9. P. erectum. 
Low alpine plant; style 3-parted. 10. P. minimum. 
Leaves narrow, decidedly reduced 
upward. 
Flowers in virgate, much elon- 
gated, loose spikes. 
