1917] Gleason,— A Prairie near Ann Arbor, Michigan 163 
Torrey and Gray, in their Flora! published one of Nuttall’s manu- 
script names, Lathyrus ornatus. Specimens of Nuttall’s original col- 
lection are in the Gray Herbarium, and in the herbarium of the 
Academy of Natural Sciences of Philadelphia. They are marked in 
Nuttall’s handwriting, “Lathyrus * ornatus, Kansa prairies.” This 
appears in Torrey and Gray’s Flora as “ Kamassa prairies,” but in 
the copy now in the library of the Gray Herbarium there is a marginal 
note made by Dr. Gray, changing Kamassa to Kansa. Mr. Bayard 
Long, after comparing the type specimens of Vicia stipulacea Pursh 
and Lathyrus ornatus Nutt. in the herbarium of the Philadelphia 
Academy, reports to us, “I should say that they are unquestionably 
identical!” 
Without further discussion, we proceed to make the new combina- 
tions which are necessary: 
Latruyrus stipulaceus (Pursh), n. comb. Vicia stipulacca Pursh, 
Fl. Am. Sept. 739 (1814); Lathyrus polymorphus Nutt. in greater 
part, Gen. N. Am. Pl. ii. 96-7 (1818); L. ornatus Nutt. ex T. & G., 
FI. N. Am. i. 277 (1838). 
L. STIPULACEUS (Pursh) Butters & St. John, var. incanus (Smith & 
Rydb.),n. comb. L. ornatus Nutt., var. incanus Smith & Rydb. Bot. 
Sem. Univ. Nebr. pt. 21, 64 (1895); L. incanus (Smith & Rydb.) 
Rydb. Bull. Torr. Bot. Club, xxxiii. 144 (1906). 
CAMBRIDGE, MASSACHUSETTS. 
A PRAIRIE NEAR ANN ARBOR, MICHIGAN. 
HENRY ALLAN GLEASON. 
Tue original land survey of Washtenaw County, Michigan, now on 
file in the office of the Register of Deeds, describes a tract of land about 
six miles north of Ann Arbor as “plains.” Several other small areas 
are described as “ prairies,’ and it is a matter of some botanical 
interest to ascertain what the original vegetation of such areas was. 
In every case investigated so far, the so-called prairies have been 
found to be bogs. Probably the word prairies was suggested to the 
surveyor by the considerable expanse of level bog covered thickly with 
Carex filiformis. 
1 Torrey and Gray, Fl. N. Am. i. 277 (1838). 
