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June 20, 2007 : Ulva intestinalis
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Keywords: Ulvaceae | Ulva intestinalis L. | MacKenzie Beach, north of Pacific Rim National Park, British Columbia, Canada
Today's photographs and write-up are courtesy of Douglas Justice, UBC Botanical Garden's Curator of Collections. This is the second in a series of at least four BPotD entries on algae.
Ulva intestinalis is pictured here attached to smooth basaltic rock in brackish water on MacKenzie Beach, just north of Pacific Rim National Park. This species is a common feature of tidepools around the world, where it is known variously as sea hair or (more appropriately) gut weed. An annual species, local beaches are littered with their bleached, dried-up stems as temperatures fall in the autumn.
Daniel adds: Note that many references will have this algae under the name Enteromorpha intestinalis (L.) Nees, e.g., DeCew's Guide. For a long time, Enteromorpha was considered a distinct genus from Ulva, based mainly on its tubular growth form. The two genera have now been merged; see Hayden et al. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. (PDF) European Journal of Phycology. 38: 277-294.
Posted by Daniel Mosquin at June 20, 2007 6:10 AM
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Posted by: bobbie at June 20, 2007 7:33 PM
I just got back to this site after recommending it to a friend last year. I WILL now try to check it EVERY day. Beautiful quality on the photos. And the range is encyclopedic which cheers me no end.
Posted by: Adam Fikso at June 19, 2008 9:41 AM
Please share your comments about the photograph(s) and accompanying write-up. Telling a story about the subject of the photograph(s) is also much appreciated! If you have a gardening question, the best place to ask is on the UBC Botanical Garden Forums. Thank you!
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Botany Photo of the Day is a project of the UBC Botanical Garden and Centre for Plant Research, located in Vancouver, British Columbia Canada. UBC BGCPR is a department of the Faculty of Land and Food Systems within The University of British Columbia.
These postings on sea algae is fascinating. There is something primal about the various plants of the ocean that draws me, although I live miles from the nearest salt water. I enjoy them!