89 
THE COLORADO TRADESCANTIA. It may be worth while to 
note that Tradescantia sp. T. Holm, Mem. Nat. Acad. Sci. то: 
180, from Colorado, is Т. universitatis Ckll.* I am confident 
that only one species of Tradescantia occurs in the vicinity 
of Denver and Boulder; and this, as Holm remarks, is not 7. 
scopulorum Rose. Dr. Rydberg believes that T. universitatis is 
probably not distinct from T. occidentalis (Britton) Britton, but 
this conclusion is based on a restriction of occidentalis to the 
plant growing from Nebraska westward, taking as the type a 
sheet so labelled by Dr. Britton. Ido not believe this proceeding 
can be justified, as the original account of occidentalis (T. vir- 
giniana occidentalis, Шиѕё. Flora 1: 377) ascribes it to "Wisconsin 
to Missouri, Texas and New Mexico," citing a western range only 
southward, where T. scopulorum grows. The leaves of our plant, 
also, are by no means "narrowly linear." 
T. D. A. COCKERELL. 
BOULDER, COLORADO. 
Eprpactis Vs. PERAMIUM.—A. A. Eaton, in the Proceedings of 
the Biological Society of Washington,f stated: “The name Epi- 
pactis appears to have been first used since 1753 by Bóhmer in 
the third edition of Ludwig's Definitiones Generum Plantarum. 
Although he makes no binomial combination, his genus is properly 
made and he gives several references to the plant designated by 
Linnaeus as Satyrium repens, now known as Goodyera repens R. 
Br., or Peramium repens Salisb." 
Then Mr. Eaton goes on and changes fifty-one names, trans- 
ferring that many species to Epipactis. 
In looking over Bóhmer's edition of Ludwig's work, Mr. 
Eaton's discussion seemed correct to meat first. I was reluctant, 
however, to adopt such a radical change, which by the way has 
been accepted by the authors of the New Gray Manual, and I 
turned to Dr. Barnhart, asking him if he could find any flaw in 
the argument. He said that he could not, except that the name 
Epipactis might have been used between 1753 and 1760. He 
suggested that Zinn might have used it. Turning to Zinn's Cata- 
enbergia 3: 54. 1907. Nature, Nov. I, 1906, p. 7. 
T Vol. 21:63. 1908. 
