316 BOTANY. 



shining. Havallah and East Humboldt Mountains, Nevada ; 7,000 feet alti- 

 tude. (1,060.) 



Var. LATiFOLiUM, Eng. Proc. Acad: Phil, March, 1863, p. 75. Low; 

 leaves oblong; spikes crowded, the upper bracts pointless. — A small state of 

 the last. Clover Mountains, Nevada; 9,000 feet altitude; September. (1,061.) 



Polygonum coarctatum, Dougl. DC. Prodr. 14. 101. Stem erect, 

 6-12' high, dichotomous, terete, smooth; branches filiform, erect; sheaths 

 semi-hyaline, 2-nerved, at length 2-parted and lacerate ; leaves lanceolate or 

 Hnear, 1-1 j' long, acute, 1-nerved, veinless, revolute on the inargin ; spikes 

 filiform, 2-3' long, loose, interrupted at base, leafless above ; bracts 1-2- 

 flowered ; calyx open, at length closed, 2" long, lobes oblong, deflexed, obso- 

 letely carinate-triangular ; achenium inclosed, very smooth, shining, the face 

 ovate-oblong. — Branchlets angled, very minutely scabrous-punctate ; bracts 

 hyaline, exceeding the subsolitary pedicels, the lower terminating with a 

 short subulate leaf, the upper leafless and pointless ; flowers becoming pendu- 

 lous; achenium occasionally minutely roughened, as described by Hooker. 

 Idaho and Washington Territory. Var. minus, Meisn. Low, |-3' high, spar- 

 ingly branched ; leaves narrow, (6-9" long h" wide,) smooth ; spikes short, 

 (j',) densely flowered ; calyx 1" long, with obovate lobes. — Achenium glab- 

 rous or more or less tuberculate-striate, even upon the same plant ; leaves 

 often more oblong, 2-3" long and nearly 1" wide, imbricated. Arctic Amer- 

 ica, (Franklin ;) Oregon, (Spalding.) It is P. confertifolium, Nutt., in Herb. 

 Gray., with " rugulose-striate " achenia, from the " Columbia Plains," and also 

 his P. imbficatum, with glabrous achenia, from the Rocky Mountains ; also 

 493 Hall & Harbour from Colorado and 125 Torrey from near Donner Lake, 

 California. East Humboldt and Clover Mountains, Nevada, and in the Wah- 

 satch; 6,500-9,500 feet altitude; June-September. (1,062.) A more 

 slender form, with shorter and few-flowered spikes. Wahsatch Mountains ; 

 6-7,000 feet altitude. (1,063.) 



Polygonum amphibium, L. Northern States and Canada to the Great 

 Slave Lake ; from Washington Territory to California, and in the mountains 

 eastward, and in New Mexico and Sonora. Valleys of Nevada, and Parley's 

 Park in the Wahsatch; 4,500-6,000 feet altitude; June-September. (1,064.) 



Var. TEEEESTEE, Willd. On stream-banks in the Wahsatch.- (1,065.) 



Polygonum Peesicaeia^ L. Malade Valley, at a sheep-ranch; intro- 

 duced. (1,066.) 



