169 



430. Morus ruhra, Linn. Verv abundant to moutli of Big Sioux; 

 Hcen sparingly and of small growth to the mountains. 



440. Urtica gracilis, Ait. Thickets and streams to Niobrara. 



441. Urtica Canadensis, Linn. Same as preceding. 



442. Parietaria Pennsylvanica, Muhl. Missouri and Yellowstone. 



443. Humidnslupnhis, Linn. Most abundant in the Upper Missouri 



country. 



444. Platanus Occident alis. Linn. Abundant on the rich bottoms of 



Missouri and Kansas; but ceases to appear about one hun- 

 dred miles above Council Bluffs. 



445. Jiiglans cinerea, Linn. Bix Sioux. 



446. Jnglans nigra, Linn. Does not extend above latitude 43°. 



447. Quercus tinctoria, Bartram. Council Bluffs and Big Sioux. 



448. Quercus rubra Linn. With preceding. 



449. Quercus macrocarpa, Michx. Extends to mountains. 



450. Cori/Jus Americana, Walt. Abundant around Council Bluffs. 



451. Bet'ula. Black hills. 



452. Alnus. Black hills. 



453. Populus trenmloides, Michx. Black hills. 



454. Populus angustifolia, Torr. 



455. Populus monilif era. Ait. A large tree, constituting by far the 



greater portion of the timber along the valley of Missouri. 

 45G. Salix. Several species. 



457. Pinus ponderosa, Douglass. Black hills. 



458. Abies Douglassi. Bad lands of the Judith. 



459. Juniperus Virginiana, Linn. Along Missouri to mountains. 



460. Arum friphyllum, Torr. Low ponds to Big Sioux. 



461. Arum Dracontmm, Schott. Found by Dr. Cooper in Kansas. 



462. Ti/pha hfifolia, Linn. Mouth of Platte. 



463. Sparganium ramosum, Hudson. Low places to Fort Pierre. 



464. Lemna. Common in ponds on upper Missouri. 



465. Pofamogefon ncdans, Linn. White river valley. 



466. Potamogeton p)ectinatus, Linn. Li ponds. Bad Lands. 



467. Alisma p)la.ntago, Linn. Common in ponds, upper Missouri. 



468. Sacjittaria variabilis, Engelmann. With preceding. 



469. Platanthera leucophea, Nutt. Lower Platte. 



470. Spirantlies cernua. Rich. Rich bottom prairies of Vermilion. 



471. Cypripedium pmhesceiis, Willd. Rocky banks to Big Sioux river. 



472. Cypripiediuin acaule, Ait. With the preceding. 



473. Iris versicolor, Linn. Lower Platte. 



474. SisyrincJiium anceps, Linn. Bottom prairies to Fort Pierre. 



475. HyjDoxis erecta, Linn. Council Blufts. 



476. Trillium sessile, Willd. Extends to Big Sioux. 



477. Smilax Jierbacea, Linn. Common. Mouth of Platte. 



478. Smilax rotundifolia, Linn. Along Missouri to mouth of Platte. 



479. Smilacina stelkda, Desf. Yery abundant to Niobrara, and 



occasionally seen to the mountains. 



480. Smilacina racemosa, Desf. Council Bluffs. 



481. Polygonafum gigantenm, Dietrich. Council Bluffs. 



