THE BOTANY OP THE ROUTE. 43 



ENDOLEPIS, N. Gen. 



"Flowers raoncecious; the male ebracteate, in glomerate terminal spikes; the female solitary 

 and sessile iu the axils of the leaves. 3Iasc. Calyx gamosepalous, urceolate, five-lobed; the lobes 

 thin, triangular — subulate strongly inflexed, each with a fleshy, protuberant gibbosity at its base 

 outside. Stamens five; filaments subulate, short; anthers oblong, large, scarcely exserted. No 

 rudiment of an ovary. Fcm. bibracteate; the bracts ovate, membranaceous, inappendiculate, 

 united to the summit, forming a compressed theca which incloses the flower. Calyx of three 

 distinct sepals. No stamens nor staminodia. Ovary ovate; styles two, distinct, filiform, slightly 

 exserted; ovate erect. Utricle ovate, compressed, enclosed in the membranaceous theca. Seed 

 ovate, rostellate at the summit, vertical, embryo nearly annular, very slender; radicle superior. 

 An annual low herb, iu aspect resembling Chenopodium or Atriplex, with lanceolate acute, 

 entire leaves. 



" Endelopis Suckleyi, n. sp. [Plate III.] As a genus this is characterized among Atrlplices 

 both by the remarkable calyx of the staminate flowers, and by the presence of a manifest 

 three-sepalous calyx in the fertile flowers. The species is dedicated to my former pupil, the 

 discoverer. ' ' — Torrey. 



Obione canescens, Moquin. 



Obione argentea, Moquin? 



Obione Suckleyana, Torr., n. sp. (Plate IV.) "Annual, stem branching, prostrate; 

 leaves suborbicular on long petioles, acutely repand-dentate, pale-green both sides, nearly 

 glabrous; glomerules axillary, monoecious bracts of the sessile fruit deltoid, united to the summit, 

 the margin narrow!}' winged, crenate-denticulate. Very distinct from every other North 

 American species of Obione, but having some resemblance to 0. argentea. It is remarkable for 

 the roundish leaves, very long petioles, and the large and much compressed nearly glabrous 

 fruit. The male flowers were tetramerous." — Torrey. This was collected in the Milk River 

 valley, August 19. 



EUROTIA LANATA, Moq. 



Eriogonum plavum, Nutt. 



Polygonum avicularb, Linn. 



Polygonum ramossissimum, Michx. 



Polygonum Virginianum, Linn. 



Polygonum amphibium, Linn. 



Rumex venosus, Pursh. 



Rumex crispus, Linn. 



Rumex persicarioides, Linn. 



Rumex salicifolilia, Weinm. 



Shepherdia argentea, Nutt. Yellowstone river, Nebraska. 



GOMANDBA UMBELLATA, Nutt. 



Euphorbia marginata, Pursh. 

 Euphorbia platyphylla, Linn. 

 Urtica dioica, Linn. 



Pilea pumila, Gray. " . .._ :_. _.. 



MoBUS RUBRA, Linn. Vermillion river, Mo. -■ ' -, ...-.-.:. :^■.'•^ 



POPULUS monilifera. Ait. 



