The following is an incomplete listing of silktassels native to the american southwest:
Ashy Silktassel, Ashy Silk Tassel, Quinine Bush, Yellowleaf Silktassel: Garrya flavescens (Synonyms: Garrya flavescens ssp. pallida, Garrya flavescens var. pallida)
Wright's Silktassel, Grayleaf Dogwood: Garrya wrightii