. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. *&*<&mru BULLETIN No. 207 Contribution from the Forest Service HENRY S. GRAVES, Forester. Washington, D. C. PROFESSIONAL PAPER. July 17, 1915. THE CYPRESS AND JUNIPER TREES OF THE ROCKY MOUNTAIN REGION. By George B. Sudworth, Dendrologist. CONTENTS. Scope of the bulletin 1 Class and family relationship of cypresses and junipers 3 Generic characteristics of cypresses 4 Arizona cypress (Cupressus arizonica Greene) 5 Smooth cypress (Cupressus glabra Sud- worth) 8 Generic characteristics of junipers 11 Common j
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. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. *&*<&mru BULLETIN No. 207 Contribution from the Forest Service HENRY S. GRAVES, Forester. Washington, D. C. PROFESSIONAL PAPER. July 17, 1915. THE CYPRESS AND JUNIPER TREES OF THE ROCKY MOUNTAIN REGION. By George B. Sudworth, Dendrologist. CONTENTS. Scope of the bulletin 1 Class and family relationship of cypresses and junipers 3 Generic characteristics of cypresses 4 Arizona cypress (Cupressus arizonica Greene) 5 Smooth cypress (Cupressus glabra Sud- worth) 8 Generic characteristics of junipers 11 Common juniper (Juniperus communis Linnaeus) 13 Western juniper (Juniperus occidentalis Hooker) 15 Mountain red cedar (Juniperus scopu- lorum Sargent) 18 Generic characteristics of junipers—Cont'd. One-seed juniper (Juniperus monosperma (Engelm.) Sargent) 20 Mountain cedar (Juniperus sabinoides (H., B. andK.) Nees) 23 Utah juniper (Juniperus utahensis (Engelm.) Lemmon) 26 Knight juniper(/M, «iperws knightii NelsoD) 26 Big-berried juniper (Juniperus megalo- carpa Sudworth) 28 Alligator juniper (Juniperus pachyphlaa Torrey) 30 Drooping juniper (Juniperus flaccida Schlechtendal) 2 Key to species 36 SCOPE OF THE BULLETIN. This bulletin describes the distinguishing characters, geographic distribution, and forest habits of all the known species of cypress (Cupressus) and juniper (Juniperus) growing within the Rocky Moun- tain region. The region embraces western North and South Dakota, Montana, Idaho, Wyoming, western Nebraska, Colorado, Utah, Nevada, Arizona, New Mexico, and western Texas. Such outly- ing regions as the Dakotas, western Nebraska, and western Texas are included because a few species extend from the main Rocky Mountain region into them. For the same reason Canadian territory lying directly north of the Rockies and Mexican territory adjacent to our Southwest are also included. Canada has no cypress or juniper trees that do not occur at some point within the United States. Mex