(,(, Muhlenhergia, Volume 6 



Marsilia vestita Hook. & Grew, "possibly not within our 

 range," is quite plentiful in damp places on the plains near New 

 Windsor; Giiia Watsoni Gray, "Utah and probably in western 

 Colorado and Wyoming, 1 ' may be found on cliffs at Glenwood 

 Springs. If all the plants which belong to Colorado were so 

 indicated, it is probable that another hundred might be added, 

 making the flora of Colorado, according to the new Manual, 

 2270 or near that number. 



The following have been altogether overlooked: Fimbris- 

 tylis castanea (Michx.) Vahl; Aristida Humboldtiana Trim & 

 Rupr.; Aristida bromoides H. B. K.; Carex magellanica Lam.; 

 Allionia Carletoni Standley; Cafdamine umbellata Greene; Ar- 

 gemone squarrosa Greene; Cristatella Jamesii T. & G.; Port u- 

 taca pilosa L.; Talinum calycimtm Engelni.; Helianthemum 

 majus (L.) B. S. P.; Acuan illinoensis (Michx.) Kuntze; StropJi- 

 ostyles paucifiora (Benth.) Wats.; Epilobittm palustre L.; Eu- 

 phorbia lata Engelni.; Piptocalyx circumscissa Ton.; Pteryxia 

 foeniculacea Nutt; Hydrophyllum virginicum L.; Asclepias uii- 

 cialis Greene; Cilia rigidula acerosa Gray; Engelmannia pin- 

 natifida T. & G.; Townsendia lepotcs (Gray) Osterhout; Machae- 

 ranthera coloradensis (Gray) Greene; Gaillardia pulchella Foug.; 

 Laciniaria squarrosa (L.) Hill; Laciniaria spicata ( L. ) Kuntze. 



There are also some introduced plants which are well es- 

 tablished in some localities, such as Sisymbrium officinale (L.) 

 Scop., Sisymbrium altissimum L-, and Arctium minus L. These 

 are nearly all of the older and generally accepted species, and 

 only those which have come nndei my observation. Six of 

 them are in Coulter's Manual Should one look to the litera- 

 tim- of Colorado botany the list could be greatly increased, for 

 while the new Manual credits to Colorado something like 2270 

 species and varieties, Dr. Ryd berg's Flora, published bj theCol- 

 do Agricultural College in [906, lists ovei 2900 species-. 



( )f tlu species excluded or reduce d to synonymy, th< greatei 

 □umber of course are the newer described ones, and while some 

 of them will undoubtedly remain undei synonymy, man) I think 

 will prove to be good species, and will he restored to a perma- 

 nent place in eui flora. In reducing so man) species to M-non- 



