Oemleria cerasiformis

Osoberry is a deciduous and perennial shrub that can reach an age of 50 years and grow to be {{Convert|7|m||sp=us}} tall. The branches are spread out and occur in a variety of sizes.{{Cite journal |last1=Mitchell |first1=Matthew G. E. |last2=Antos |first2=Joseph A. |last3=Allen |first3=Geraldine A. |date=March 2004 |title=Modules of reproduction in females of the dioecious shrub Oemleria cerasiformis |url=https://www.proquest.com/docview/218620745 |journal=Canadian Journal of Botany |location=Ottawa |volume=82 |issue=3 |pages=393–400 |doi=10.1139/b04-018 |bibcode=2004CaJB...82..393M |id={{ProQuest|218620745}} }} The bark is a smooth dark gray to reddish-brown color, with twigs with similar coloring of green to reddish brown. The bright orange lenticels (pores), grow up to {{Convert|0.5|in|cm|sp=us|order=flip}} in length on twigs of osoberry. The light green leaves of osoberry are simple, alternating, and oblong, with a length of {{Convert|2-5|in|cm|abbr=on|order=flip|sigfig=2}}.{{cite web |title=Oemleria cerasiformis Fact Sheet |url=http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=220 |url-status=dead |archive-url=https://web.archive.org/web/20090416182618/http://www.cnr.vt.edu/DENDRO/DENDROLOGY/syllabus/factsheet.cfm?ID=220 |archive-date=2009-04-16 |access-date=2009-03-06 |publisher=Virginia Tech}} These leaves can smell similar to cucumbers.{{Cite book |last=Deur |first=Douglas |title=Pacific Northwest Foraging |publisher=Timber Press |year=2014 |isbn=978-1-60469-615-8 |edition=1st |location=Portland, Oregon |publication-date=2014 |pages=239–241 |language=English}}

Osoberry bears racemes of small white flowers that have 5 separate pistils, which can develop into a drupe.{{Cite journal |last1=Allen |first1=Geraldine A. |last2=Antos |first2=Joseph A. |date=1998 |title=Relative Reproductive Effort in Males and Females of the Dioecious Shrub Oemleria cerasiformis |url=https://www.jstor.org/stable/4218643 |journal=Oecologia |publisher=Springer Nature |volume=76 |issue=1 |pages=111–118 |doi=10.1007/BF00379608 |jstor=4218643 |pmid=28312387 }} A drupe can have 10–20 flowers growing from it. The racemes typically grow five to nine flowers, growing from the base of young shoots, and from short shoots of mature twigs. The flowers begin to grow as leaves are emerging and are fully bloomed before leaves have completely emerged. The amount of fruit yield varies depending on the amount of light in the spring, with sunny locations producing more, as well as larger and sweeter fruits.{{Cite book |last=Nyerges |first=Christopher |url=https://www.worldcat.org/oclc/965922681 |title=Foraging Washington: Finding, Identifying, and Preparing Edible Wild Foods |publisher=Falcon Guides |year=2017 |isbn=978-1-4930-2534-3 |location=Guilford, CT |oclc=965922681}} The plum fruit of osoberry begin as reddish pink and deepen to a deep blue color as they ripen. The fruit is known to be bitter, but sweetens as it ripens, tasting similar to cherries or watermelon. The mass of a mature fruit is around 200 grams. The osoberry fruit encloses a pit, which contains toxic cyanoglucosides (found also in bitter almonds).

Osoberry are pollinated by native pollinators such as bees, moths, butterflies, hummingbirds, and more. The nectar in the flowers of osoberry is an important source of food for these pollinators in the early spring.

Osoberry seeds are dispersed through internal animal dispersal. Many animals eat osoberries, primarily birds, along with small mammals, coyotes, foxes, deer, and bear. The seeds are dispersed through the feces of these animals, germinating where they have been defecated.{{Cite book |last1=Mason |first1=Kenneth A. |title=Biology |last2=Losos |first2=Jonathan B. |last3=Duncan |first3=Tod |publisher=McGraw-Hill Education |year=2020 |isbn=9781260565959 |edition=12th |location=New York |pages=1222 |language=English}}

Osoberry is dioecious, with almost all plants being male or female. The shrubs have groups of up to twenty closely spaced stems of the same sex. The plants consist of almost completely strictly one gender, and the individuals are usually male. The reproductive biomass that males are mostly made up of are flowers and petals. On the other hand, the reproductive biomass of female individuals is largely made up of the fruit set.{{Cite journal |last1=Antos |first1=Joseph A. |last2=Allen |first2=Geraldine A. |date=March 1994 |title=Biomass Allocation among Reproductive Structures in the Dioecious Shrub Oemleria Cerasiformis – A Functional Interpretation |url=https://www.jstor.org/stable/2261382 |journal=Journal of Ecology |volume=82 |issue=1 |pages=21–29 |doi=10.2307/2261382 |jstor=2261382 |bibcode=1994JEcol..82...21A }} Only female osoberry produce fruit.

David Douglas and John Scouler were the first botanists to collect Oemleria in 1825, followed by Tolmie, Gairdner, and Nuttall, The genus was first named Nuttallia in 1838, but that name had already been given to three other genera.Hooker, William J, & G.A.W. Arnott. 1838. Botany of Captain Beechey's voyage, p. 336{{Full citation needed|date=December 2024}} In 1841, Reichenbach published Oemleria as a nomen novum, in honor of Augustus Gottlieb Oemler, a naturalist in Dresden who had lived in Georgia, had known Nuttall, and had given Reichenbach specimens of plants from America.Reichenbach, H. G. L.,1841. Das Herbarienbuch. Fn. p. 195{{Full citation needed|date=December 2024}} Reichenbach did not publish a name for the species under the new genus, and most{{specify|date=December 2024}} botanists later adopted Osmaronia cerasiformis, published by Edward Lee Greene in 1891, until 1975, when J.W. Landon reasserted the prioity of Reichenbach’s name and published the full proper name of the species. Greene, E.L., Against revertable names, in Pittonia, volume 2, p. 189. 1891{{Full citation needed|date=December 2024}} Landon, John W., "A new name for Osmaronia cerasiformis (Rosaceae)". In Taxon, vol 24. p. 200. 1975{{Full citation needed|date=December 2024}}

Oemleria cerasiformis is the only extant member of its genus, Oemleria. A fossil species is known from the genus, Oemleria janhartfordae from the Eocene Klondike Mountain Formation. Rosaceous flower fossils found in Northeastern Washington state show that Oemleria was present in the early Eocene of western North America.

Image:Indian_Plum.JPG]]

Osoberry are found in the Pacific Northwest, ranging from Northern California to Southwestern British Columbia. The shrubs grow in places such as second-growth forests, stream terraces, forest, or roadside margins. Osoberry grow in places with sunlight, and usually below elevations of {{Convert|1000|ft||order=flip|abbr=on}}. The shrub can grow up to {{Convert|5000|ft||abbr=on|order=flip}} in elevation. Moist soil is preferred, but not grounds that are saturated in winter months.

Osoberry flowers bloom and leaves bud in the late winter to early spring. Osoberry are relatively short compared to trees in the Pacific Northwest. The early bud timing allows the osoberry to get access to sunlight that is not as easily available in later months. When taller trees or shrubs have grown their leaves, this can block sunlight from reaching an osoberry shrub.

Image:Oemleria cerasiformis 15165.JPG

The Pacific coast tribes utilized its fruit, twigs, and bark, as food sources and for teas and medicine. It is one of the first tree-borne fruits to ripen in summer and as such was prized by indigenous peoples and wildlife alike.

The wood is exceptionally strong and fine-grained. But, with stems generally less than 5 cm (2 in) in diameter, this small size limits the size of products that can be made from it. The fairly common straight shoots make fine primitive arrows and the rare, large enough and straight stem can be fashioned into an excellent self bow. It is also suitable for small wooden tools such as spoons, combs, knitting needles, etc. The fine grain and lack of significant figure also make the wood well-suited for fine detail carving.

Native Americans made use of the shrub's bark, using it to bind harpoon tips. Native tribes also used the bark of osoberry for treating tuberculosis. The bark was also used as a mild laxative, and chewing its twigs had mild anesthetic and aphrodisiac effects.{{cite book |last1=Pojar |first1=Jim |title=Plants of the Pacific Northwest |last2=MacKinnon |first2=Andy |publisher=Lone Pine Publishing |year=2004 |isbn=978-1-55105-530-5 |pages=72}}

Currently, osoberry is popular for restoration projects in the Pacific Northwest. Living osoberry branches can be used as live stakes in restoration projects to prevent erosion. The roots of osoberry are fibrous and are good for preventing erosion of soil.

The fruits can be eaten raw or cooked when bitter; they tend to be somewhat astringent. The Indigenous peoples of the Americas included osoberry in their diets, making tea of the bark. Several Indigenous tribes from Western Washington, such as the Snohomish, Chehalis, and Squaxin tribes, ate the berries fresh. The Cowlitz tribe also ate the berries fresh, along with drying them for winter uses.

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• [https://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment?6677,6813,6814 Jepson Manual Treatment]
• [https://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Oemleria+cerasiformis Photo gallery]

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Category:Exochordeae

Category:Flora of the Northwestern United States

Category:Flora of Oregon

Category:Monotypic Rosaceae genera

Category:Plants used in Native American cuisine

Category:Dioecious plants

Category:Flora without expected TNC conservation status