BOTANY OF THE ROUTE. 47 



"ENDOLEPIS, N. Gen. 



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

 and sessile in the axils of the leaves. Masc. 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. Fern, bibracteate ; the bracts ovate, membranaceous, inappendiculate, 

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

 distinct sepals. No stamens nor staminodia. Ovary ovate ; stjdes 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, in aspect resembling Chenopodium or Atriplex, with lanceolate acute, 

 entire leaves. 



"Endelopis Suckleyi, n. sp. (Plate III.) As a genus this is characterized among AtripUces 

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

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

 discoverer." — Torbet. 



Obioxe canescexs, Moquin. 



Obione argentea, Moquin ? 



Obione SuCKLETANA, Torr., n. sp. (Plate lY.) "Annual, stem branching, prostrate; leaves 

 suborbicular on long petioles, acutely repand-deutate, pale-green both sides, nearly glabrous ; 

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

 margin narrowly winged, crenate-denticulute. 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 neai'ly glabrous fruit. 

 The male flowers were tetramerous." — ToRRET. This was collected in the Milk River valley, 

 August 19. 



EUROTIA LANATA, Moq. 



Eriogonum flavum, Nutt. 



PoLYGOXUM aviculare, Linn. 



Polygonum ramossissimum, Michx. 



Polygonum Virginianum, Linn. 



Polygonum amphibium, Linn. 



RuMEX VENOSUS, Pursh. 



RuMEX CRispus, Linn. 



RuMES persicarioides, Linn. 



RuMEX salicifolia, "Weinm. 



Shepherdia argentea, Nutt. Yellowstone river, Nebraska. 



Comandra umbellata, Nutt. 



EUPHORBLi MARGINATA, Pursh. 



Euphorbia platyphylla, Linn. 



Urtica dioica, Linn. 



Pilea pumila, Gray. 



MoRUS rubra, Linn. Yermillion river, Mo. 



Populus monilifera. Ait. 



