ZTJftl AND COLORADO RIVERS. 167 



Mentha Canadensis, Linn. ; Benth. 1. c. P glabrata, Benth., 1. c. -\f. borealis, 

 Michi. Fl. 2. p. 2. Rio Laguna ; August. 



Cedronella Jhzicana, Benth. Lab., p 502 ? Zuiii mountains ; August. 



VERBENACEJE. 



Verbena bracteosa, Michx. Fl. '2, p. 14 : Schaur. in D. C. Prodr. 11, p. .545. 

 Rio Zuni : September. 



PLUMBAGIN'ACEJE. 



Statice Californica, Boiss, in D. C. Prodr. 12, p. 643. Zuiii mountains f Au- 

 gust. Not sufficiently distinct, I fear, from S. Umonlum. 



POLYGON ACE.E. 



Polygonum aviculare, Linn.; Gray. Bot. N. States, p. 338. On the Zuni ; 

 August. A large form, with greatly elongated assurgent branches, which are 

 two feet or more in length. 



Eriogonum orlhocladon (Torr. mss., in D. C. Prodr. ined. :) perenne, albido- 

 tomentosum ; foliis omnibus radicalibus ovato-oblongis longe petiolatis pedunculo 

 (ve! caule) erecto scapiformi nudo stricto, supra medio 2 (rare 3) fido, ramis 

 erectis indivisis vel rarissime bifidis : involucris campanulato-tubulosis solitariis 

 sessilibus distantibus, apice 5-dentatis : perigoniis glabris, laciniis obovatis aequa- 

 libus. On the Zuni and San Francisco mountains : August. October. Leaves all 

 radical, springing from a short thick caudex, about two inches long, clothed (like 

 the rest of the plant) with a white flocculent pubescence. Scape 2-3 feet high, 

 terete, straight, divided above the middle into two, or rarely three, straight erect 

 branches, both of which are sometimes again forked ; involucres somewhat uni- 

 lateral along the upper part of the branches, many-flowered, somewhat trun- 

 cate, but distinctly five-toothed at the summit : pedicels exserted, articulated 

 close to the flower, glabrous ; bracts filiform, plumose, as long as the pedicels : 

 filaments glabrous ; styles twice as long as the ovary, recurved. 



This, and the following new species, I communicated to Mr. Bentham, who, 

 I believe, has described them in his monograph of ErioffoneEB, prepared for the 

 forthcoming volume of De Candolle's Prodromus. 



E.phamaccoides, (Torr., 1. c. :) annuum, erectum, e basi ramosissimum : ramis 

 pubescentibus filiformibus : foliis lineari-lanceolatis acutis basi attenuatis subtus 

 albo-tomentosis ; involucris terminalibus solitariis companulatislonge-peduncula- 

 tis : 5-fidis, laciniis acutis : perigoniis glabris, laciniis exterioribus avatis obtu- 

 sissimus basi utrinque subsaccatis. interioribus linearibus longioribus. Western 

 part of New Mexico ; October. Also collected by Mr. Wright and Dr. Biirelow, 

 on the Rio Grande Stem 8-15 inches high, divaricately branching from the base 

 in a verticillate manner : the branches very slender ; leaves G-10 lines long, 3 to 



