Vol. 1 (beginning to p.830623-191): Trip to AR, Louisiana, TX, AZ, West Coast, Western Canada, MT, WY, CO, OK. Leaf samples from Texas. Drawings of petroglyphs from caves in El Paso Co., TX. Leaf samples from California. Vol. 2 (p.830624-192 to end): Observations from California and Baja California. Trip to Oregon and Washington State. Observations from B.C. and Alberta, Canada. Trip to MT, WY, UT, AZ, TX.