polygonum POLYGONACE/E 583 



mens 5-8 included : style very short, 3-parted. High mountains, Washing- 

 ton to Colorado. 



P. Austinae Greene 1. c. Glabrous and scurfy throughout: stems 

 mostly erect, 2-6 inches high, branched from the base: leaves ovate-lance- 

 olate to oblanceolate. 3-6 lines long, acute, sessile, revolute or flat, bright 

 green beneath: ocreae about 2 lines long, at length slightly lacerate: flow- 

 ers in clusters of 2-3 in the axils of the leaves, drooping, on reflxed pedicels : 

 calyx green, a line long, 5-parted to near the base, the segments narrowly 

 oblong obtuse, with whitish borders: stamens 5-8, included: style very 

 short, 3-parted to the base. In the high mountains, eastern Washington 

 to California. 



P. majus Piper Fl. Palouse Reg. 63. Stem wiry, terete, erect or near- 

 ly so, much branched from the base, 6-18 inches high; leaves linear-lan- 

 ceolate, 1-3 inches long, sessile: ocreae scarious, 6-12 lines long, at length 

 lacerate : flowers few, in the axils of the upper leaves, spreading or ascend- 

 ing on short pedicels: calyx broadly campanulate, 1-2 lines long, 5-cleft to 

 below the middle, the segments oblong, rounded at the apex, white with 

 green midveins : stamens 5, included : style 3-parted to the middle : fruit re- 

 flexed. Common in stony soil, eastern Washington. 



P. spergnlariae forme Meisn. Small Bull. Torr. Bot. Club xix, 366. 

 P. coarctatum Pougl. not Willd. Glabrous throughout: stem slender 

 and wiry, erect, 4-20 inches high, branched, the branches usually erect : 

 leaves linear-oblong to linear lanceolate, }4~^-}4 inches long, acute, sessile, 

 the margins usually revolute : ocreae 4-6 lines long, soon finely lacerate : 

 flowers numerous, in small clusters in the axils of the upper leaves, erect 

 or spreading: calyx 2 lines long 5-parted to near the base, the segments 

 obovate, obtuse, pink with green midveins : stamens 5, included : style 

 about a line long, 3-parted. On dry stony or sandy places, Brit. Columbia 

 to California and Colorado. Flowering from Spring until Autumn. 



P. lineare Hook. Fl. ii, 137. ? Minutely puberulent thoughout: 

 stem slender, prostrate or ascending, diffusely branched, 4-10 inches long, 

 leaves linear to linear-lanceolate, }4-l inch long acute, sessile, the margins 

 strongly revolute, dark green above, white beneath : ocreae about 4 lines 

 long, soon lacerate: flowers in small clusters in the axils of subulate bracts 

 at the ends of the branches : crowded and apparently spicate, erect or sprea- 

 ding, on short pedicels : calyx ahout 2 lines long, broadly campanulate, 5- 

 cleft to near the base, the 3 outer segments obovate. rounded at the,apex, 

 the 2 inner ones narrower and barely obtuse, all pink. or rose-color with 

 green midveins : stamens 8, included. On mossy banks along the lower 

 Columbia and Willamette rivers. Not flowering until Autumn. 



P. Nuttallii Small Monog. Polyg. 132. P. intermedium Nutt. no* 

 Ehrh. Glabrous throughout : stem slender and wiry, erect 3-9 inche s 

 high simple irregularly and divergently branched, dark red: leaves linear- 

 lanceolate, 4-18 lines long, acute, sessile, glaucescent beneath more or less 

 revolute : ocreae 1-2 lines long, at length lacerate : flowers in the axils of 

 the upper leaves, crowded and racemose, erect: calyx greenish, about a 

 line long, 5-parted to near the base, the segments oblong, with pinkish 

 margins: stamens 8 or fewer, the filaments dilated at base. On grassy 

 banks, Brit. Columbia to Oregon. 



P. Kelloggii Greene Fl. Fr. 134. Glabrous throughout: stem slen- 

 der, mostly erect, 1-3 inches high, divergently branched from near the 

 base: leaves linear or linear-lanceolate 2-6 lines long, acute, sessile, crowd- 

 ed on the branches but spreading and not imbricated, much the same size 

 throughout: ocreae funnelform a line or less long, thin and early lacerate: 

 flowers in small clusters in the axils of the upper leaves, contiguous on 

 account of the very short internodes making the branches appear like leafy 



