May 01, 2019

A Note on Primula (Dodecatheon) in the National Scenic Area Colombia River Gorge

The wild flowers known as Shootingstars or Bird-bills are commonly observed in the Columbia River Gorge National Scenic Area. This note is provided to help identify this attractive spring flower. Two internet resources are available to assist with identification http://biology.burke.washington.edu/herbarium/imagecollection/results.php?Terms=Dodecatheon&x=7&y=11&Type=Names and http://www.oregonflora.org/gallery.php#. The Flora of the Pacific Northwest second edition 2018 is the latest technical identification key and should be consulted for morphological details.

The taxa in the Genus Dodecatheon (iNaturalist Primula) requires examination of small flower structures to key to the specific name. This group of flowers also has high species diversity. These natural features combine to create a difficult genus to identify to species. In the Columbia River Gorge National Scenic Area there are seven reported species, http://www.oregonflora.org/atlas.php#. These taxa are distributed to specific regions of the area and by elevation.

In Oregon and Washington, the taxonomic name Dodecatheon is still in use. However, in iNaturalist the name Primula is used. The use of the regional name is being kept, to be consistent with the records in the state floras. Observations in iNaturalist will require a translation to Primula and to the alternative name.

Dodecatheon alpinum
is not likely to be found in the gorge as it is a higher elevation species. This is a synonym for Primula tetrandra in Jepson http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=98394.

Dodecatheon conjugens
is known from a wide area east of Hood River. In the gorge this species is known from Oregon White Oak woodlands. Observation https://www.inaturalist.org/observations/23861530 provides a close view of the filaments which are free to the base. The leaf is fleshy, ovate with an entire edge.

Dodecatheon cusickii
is known by two names, in Oregon as D. cusickii and Washington as D. pulchellum var. cusickii. D. cusickii is known from east of Hood River. The leaves and stems are densely puberulent or glandular.

Dodecatheon dentatum
is known from west of Hood River. It is easily identified by its white color. In iNaturalist this is known as Primula latiloba. One observation is known https://www.inaturalist.org/observations/9606283 at Multnomah Falls.

Dodecatheon jeffreyi
is known from the Cascade Mountains is not likely to be found in the gorge.

Dodecatheon poeticum
is known from the gorge east of the Cascade crest and expected. This species has fused filaments, oblanceolate leaves, undulate or crenate or irregular margins, and attenuate base. The leaves and stems are densely puberulent or glandular.

Dodecatheon pulchellum
is known from the west gorge to The Dallas. The D.p. var. cusickii is expected east of Hood River. The leaf of D. pulchellum is oblanceolate with an attenuate base. This species has fused filaments. This taxa is noted as a synonym of Primula pauciflora http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=98396 and by iNaturalist.

The distribution of Dodecatheon in the gorge is helpful as it allows for a reduced expected species list. However, identification requires observation of the filaments and leaves to properly name the specific taxa. For those wishing to look at the larger taxonomy of the Dodecatheon, the Flora of North America provides a overview http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=110733.

Posted on May 01, 2019 05:11 by carexobnupta carexobnupta | 0 comments | Leave a comment

April 06, 2019

New taxa split from Lomatium grayi

The species in the genus Lomatium are notoriously difficult to identify. The shear number of species is the first obstruction to knowing this group. The morphological features needed to identify the in-hand specimen are multiple and both subtle and obscure.

New research into the Lomatium grayi has resulted in the publication of a revision.
Jason Andrew Alexander, Wayne Whaley, and Natalie Blain, J. Bot. Res. Inst. Texas, volume 12, number 2, 20 Nov 2018 https://www.brit.org/sites/default/files/public/brit_press/JBRIT12-2/JBRIT2018-12-2-387.pdf. This revision has implications for L. grayi iNaturalist observation in Idaho, Washington, and Oregon. The majority of the observations in this region should be transferred to L. papilioniferum. However, in the area of the Columbia River Gorge and Klickitat County there is a mixture of L. papilioniferum and L. klickitatense. These two new taxa are recognized by the Oregon Flora Project and the Burke Herbarium. At this time these two new taxa are not recognized by iNaturalist. Once the new taxa are recognized the taxa change can not occur by a taxon swap as the two species are locally intermixed.

These observations require a review in order to place them in the correct taxa.

https://www.inaturalist.org/observations/21865335#activity_comment_2726764
https://www.inaturalist.org/observations/21985361#activity_comment_2725472
https://www.inaturalist.org/observations/13224101
https://www.inaturalist.org/observations/12345023
https://www.inaturalist.org/observations/10198591
https://www.inaturalist.org/observations/6178534

Posted on April 06, 2019 21:33 by carexobnupta carexobnupta | 0 comments | Leave a comment

March 09, 2019

Quercus garryana at opposite ends of the range

It is interesting to observe the progression of spring and the response of one species. Observation https://www.inaturalist.org/observations/20892024 demonstrates the onset of spring in the Santa Rosa area of Northern California. Where https://www.inaturalist.org/observations/21066649 demonstrates winter in Victoria, British Columbia, Canada. Spring leaf break is still two months away. I will be interesting to see if more observations document the progression northward.

Posted on March 09, 2019 07:24 by carexobnupta carexobnupta | 0 comments | Leave a comment

June 28, 2017

Resources for the Quercus garryana Range

General mapping of the Q. garryana range is published in two documents, Little 1971 and Burns & Honkala 1990. Species specific digital ranges (ArcMap Shapefiles) are available for the Little Atlas. The Agriculture Handbook 654 is available in PDF format.

The Agriculture Handbook 654 maps oak to the eastern edge of Klickitat County, Washington but does not include the East Cascade oak forest in south Wasco County. The Little Atlas does include the Wasco County distributions but not the Klickitat County distribution.

Russell M. Burns and Barbara H. Honkala, Technical Coordinators, Timber Management Research;
Silvics of Forest Trees of the United States, Agriculture Handbook 654, Forest Service, United States Department of Agriculture, Washington, DC;
December 1990;
Library of Congress Catalog Card Number: 86-60058.
https://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/quercus/garryana.htm

Little, E.L., Jr., 1971, Atlas of United States trees, volume 1, conifers and important hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1146.
http://gec.cr.usgs.gov/data/little/

Buechling A, Alverson ER, Kertis J, Fitzpatrick G, Classification of Oak Vegetation in the Willamette Valley, Oregon Natural Heritage Information Center, Oregon State University, 03/2008,
https://inr.oregonstate.edu/biblio/classification-oak-vegetation-willamette-valley

Posted on June 28, 2017 06:48 by carexobnupta carexobnupta | 0 comments | Leave a comment

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