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Proceedings of Past Forest Nursery Association Meetings:

Propagation of Native Plants for Restoration Projects in the Southwestern U.S. - Preliminary Investigations
David R. Dreesen and John T. Harrington
1997: Boise, ID
Seed treatments to enhance germination capacity of a variety of native tree, shrub, forb, and
grass species are reported. Scarification methods including hot water immersion (HW), mechanical
scarification (MS), tumble scarification (TS), proximal end cuts (PEC), and sodium hypochlorite (SH)
have been tested: Psorothamnus fremontii(HW, TS), Ceanothus integerrimus (HW), Ceanothus
sanguineus (HW), Rhus glabra (HW), Ptelea trifoliata (PEC of seed separated by size and color), Rubus
strigosus (SH), Oryzopsis hymenoides (TS), Coleogyne ramosissima (TS), and a variety of native woody
and herbaceous perennial legume species (HW, TS, MS). Gibberellic acid treatments were examined to
overcome endo-dormancy of Alnus tenuifolia, A. oblongifolia, Rubus strigosus, and Oryzopsis
hymenoides. Vegetative propagation methods investigated include mound layering of Platanus wrightii,
root propagation of Populus tremuloides, and pole plantings of riparian understory species (Amorpha
fruticosa, Baccharis glutinosa, Forestiera neomexicana, and Chilopsis linearis).
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