- Probably few persons have ever numbered specimens without slips. Every time that you see an "a" appended to a number, that means that there has been a slip, ordinarily. See p. 7 ante. It is very easy to give the same number to two different plants. If one is numbering straight along it is easy enough. But if there are 2 or 3 or more or a variable number of sheets to be given one number, then one must notice and check.
- Greene, E. L. He never told us, his students, how to press plants. I supposed he expected us as intelligent observing youngsters to go and do likewise - as we saw others do. At any rate he never stressed the mechanical
side, although he often criticized us for collecting scraps or too scantily. Apparently, when we got a thing that was "common" in a spot, we concluded it was well enough known. How severely he retorted on us when we made that plea; neglected to get the root system; or failed in sufficiently illustrative material.
- Jones, M. E. "Hot Springs, April, 1882", California. Oenothera bistorta. Jones always has a label for his plants. His failure is in specifying county in the case of common place names.
- cf. V. E. Shelford, Jan. 26, 1922, in litt. as to preservation of natural areas. See also printed pamphlet by V. E. Shelford.