Peter F. Zika

An overlooked hybrid Japanese knotweed (Polygonum cuspidatum × sachalinense; Polygonaceae) in North America.

Peter F. Zika, Arthur L. Jacobson · Rhodora · 2003 · 48 citations

Biology, Biodiversity, Plant Diversity +13

Time Prediction of a Rock Fall in the Carnic Alps

Ulrich Glawe, Peter F. Zika, Jiří Zvelebil et al. · Quarterly Journal of Engineering Geology · 1993 · 12 citations

Rock Testing, Rock Slide, Engineering +23

Botrychium ascendens W. H. Wagner (Ophioglossaceae) in Newfoundland and Notes on its Origin

Peter F. Zika, Donald R. Farrar · American Fern Journal · 2009 · 12 citations

Botany, W. H. Wagner, Botrychium Ascendens +16

The status of Impatiens capensis (Balsaminaceae) on the Pacific Northwest coast

Peter F. Zika · The Journal of the Torrey Botanical Society · 2006 · 12 citations

Impatiens Capensis, Engineering, Botany +17

PATTERNS OF RARITY IN THE OREGON FLORA: IMPLICATIONS FOR CONSERVATION AND MANAGEMENT

Thomas N. Kaye, Robert J. Meinke, Jimmy Kagan et al. · 1997 · 10 citations

Biodiversity, Invasive Specie, Local Population Size +13