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Title: Botanical survey of Myrtle Island Research Natural Area, Oregon.

Author: Thompson, Ralph L.;

Date: 2001

Source: Gen. Tech. Rep. PNW-GTR-507. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 27 p

Publication Series: General Technical Report (GTR)

Description: Myrtle Island Research Natural Area, an 11.3-ha island in the Umpqua River Valley of the Oregon Coast Range, was established in 1951 to preserve an old-growth stand of Umbellularia californica and scattered old-growth Pseudotsuga menziesii. This floristic study documented 363 specific and infraspecific taxa in 237 genera and 78 families. Of these species, 155 (42.7 percent) are naturalized exotics. Seventeen exotic or native species are listed as noxious weeds in Oregon. Vascular plants include 4 Equisetophyta, 8 Polypodiophyta, 2 Pinophyta, and 349 Magnoliophyta; 328 are annual, biennial, and perennial herbs, and 35 are woody vines, shrubs, and trees. The largest families in species richness are the Poaceae (50), Asteraceae (43), Fabaceae (29), Rosaceae (17), Cyperaceae (16), Scrophulariaceae (14), Caryophyllaceae (13), and Brassicaceae (13). This vascular plant survey provides a baseline reference for species richness, plant communities, generalized life forms, and relative abundance within Myrtle Island Research Natural Area.

Keywords: Vascular plants, plant communities, species richness, exotics, noxious weeds, old-growth forests, riparian forests, research natural areas

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

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Citation:


Thompson, Ralph L. 2001. Botanical survey of Myrtle Island Research Natural Area, Oregon. Gen. Tech. Rep. PNW-GTR-507. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 27 p

 


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