| Arkansas | Prof. N. F. Drake | Univ. of Arkansas, Fayetteville |
| California | Will J. Thorpe | 1545 Divisadero St., San Francisco |
| Canada | J. U. Gellatly | West Bank, P. O. Gellatly, B. C. |
| China | P. W. Wang | Sec'y Kinsan Arboretum, 147 N. Sechuan Road, Shanghai |
| Connecticut | Dr. W. C. Deming | 983 Main St., Hartford, Conn. |
| Dist. of Columbia | Karl W. Greene | Ridge Road, N. W., Washington |
| England | Howard Spence | The Red House, Ainsdale, Southport |
| Illinois | Prof. A. S. Colby | University of Illinois, Urbana |
| Indiana | J. F. Wilkinson | Rockport |
| Iowa | S. W. Snyder | Center Point |
| Kansas | W. P. Orth | Route 2, Box 20, Mount Hope |
| Maryland | T. P. Littlepage | Bowie |
| Massachusetts | James H. Bowditch | 903 Tremont Building, Boston |
| Michigan | Harry Burgardt | Union City Michigan |
| Minnesota | Carl Weschcke | 98 South Wabasha St., St. Paul |
| Missouri | P. C. Stark | Louisiana |
| Nebraska | William Caha | Wahoo |
| New Jersey | Miss M. V. Landman | Cranbury, R. F. D. No. 2 |
| New York | Prof. L. H. MacDaniels | Cornell University, Ithaca |
| Ohio | Harry R. Weber | 123 East 6th St., Cincinnati |
| Oregon | Stanley C. Walters | Mount Hood |
| Pennsylvania | John Rick | 438 Penn Square, Reading |
| Rhode Island | Phillip Allen | 178 Dorrance St., Providence |
| Vermont | Zenas H. Ellis | Fair Haven |
| Virginia | Dr. J. Russell | Smith Round Hill |
| Washington | Dr. J. E Cannaday | Box 693, Charleston |