
          collected a beautiful Alnus 30 or 40 feet high in
 fruit. I had observed it in the early part of the Season
 before and while it was in bud. You will find them
 in my collections also I think some novel Populi.
 By the way with regard to the little Juglans I sent you
 from Devils River Mr. Wright thinks that this has been already
 published in some western collection but that the one we send
 from the Cobre [Santa Rita del Cobre, New Mexico] is new. I was too late to collect the one below
 in flower. Although they appear to encroach upon each
 other they seem to me quite distinct. I enclose a drawing
 of the one from Devils River made on the spot by Mr.
 Kettlewell. Dr. Parry contemplates starting in a few days
 down the Rio Gila in company with Maj [Major] Emory.
 Mr. Thurber went with the Commissioner in August last.
 At the season in which he went he will find a fine
 novel field. Mr. Wright with whom I am best acquainted 
 was detailed by Col. [Colonel] Graham in Nover. [November] to Survey the Rio Grande
 but fortunately for him the season for botanizing was past
 and I think they will relieve him and permit him to
 follow his old pursuits by the time vegetation opens
 in the Spring. Where I shall be next summer I 
 hardly know probably about the mountains of Eagle
 Pass on the Rio Grande some 700 miles below this
 point. I am glad to find you take what I consider the
 right view with regard to diagnosticating and publishing
 our new species of plants as soon as possible. Mr. Bartlett
 seems to entertain a different opinion with respect to
 it. I wonder Mr. Thurber does not send his plants home.
 If he attempts to keep them until he returns home to
        