6 
KRIGIA, Schreber.—K. Virginica, Willd.; common ; N. Y.; Glen Cove, 
Coles ; not abundant on this part of L. L., Ruger. 
CYNTHIA, Don.—f. Virginica, Don ; common in N. J.; Fordham, West- 
chester Co., and Glendale and Locust Av., L. I., Ruger. 
CREPIS, L.—C. virens, L.: Var. diffusa; Greenwood Cemetery, vid. 
§ 50, Vol. L 
9. Herbarium Suggestions—No. I. Size of genus-covers and sheets for 
species.—It is evident that some uniform standard ought to be se- 
lected by botanists for the size of the sheets of paper to which 
their dried specimens of plants are attached, and of the genus- 
covers containing the same, for this would greatly facilitate ex- — 
change from one herbarium to another. At present, however, 10 — 
such standard is recognized, as is evident on consulting botanical — 
works or in looking over the herbaria of different collectors. a 
Writers on botany usually pass the subject over, regarding it, — 
apparently, as infra dig. Taking up half a dozen authors, whose — 
works happen to be within reach, I find only two who mention it:— _ 
Balfour, Manual of Botany, 1855, p. 658, recommends that the — 
sheets for species should be 17 inches in length and 10} in breadth. — 
Prof. Alphonso Wood, Botanist and Florist, 1870, says the pape? 
should at least be 14 by 11 inches. 
Dr. Torrey’s sheets, which I have measured in his herbarium, are — 
fifteen and one-quarter by eleven inches, a 
Dr. Gray’s sheets for species are sixteen and four-tenths by — 
eleven and one-half inches ; his genus covers are sixteen and four- — 
tenths by twelve inches. It may be noticed, in passing, that this 
relative proportion is objectionable, because no difference is made — 
in height between the species and genus sheets, and, although — 
packing a genus cover will not diminish its height, yet, in the ne — 
-eessary hurry of insertion, species sheets will project a little above — 
or below, and in time will show a discolored margin, due to eX — 
posure to air and dust, which liability can practically be obviated 
only by allowing a difference in height as well as width. = 
Again, if report be true, an eminent botanist, on commencing — 
his collection many years ago, ordered paper of a certain size which — 
he had carefully selected. His stationer made a mistake of half an — 
inch or so ; the bs i thus cut was too valuable to be thrown aways — 
and the error has been perpetuated in all subsequent purchases, — 
and has been followed by many of his pupils! 
Whatever size is adopted, in commencing a collection, it must, a 
almost necessarily, be retained in future, so that the following — 
suggestions on this score can only be of use to younger botanists. 
The size-which I would propose as a standard, and one which I 
have tested by many years experience, is, in the extreme measure 
ment of all outside covers containing sheets of dried specimen 
eighteen inches in length by twelve inches in breadth ; and the 812@ 
of the enclosed sheets just one-half inch less each way. Yout — 
genus-covers, when folded and ready for use, will then measure ® — 
foot and a half in height by a foot in width. Your sheets to whi¢ 
your plants are attached will measure seventeen and a half inch 
