Lomatium dissectum

It is a perennial herb reaching up to {{Convert|1.2|m}} tall, growing from a thick taproot. The leaves are mostly attached near the base of the plant, spreading with petioles up to {{Convert|30|cm}} long and large blades divided into many small, narrow segments. The inflorescence is an umbel of many small yellow, purple, or reddish flowers, each cluster on a leafless stem up to 10 cm long. The fruits resemble pumpkin seeds. Screening tests have been performed on root extracts of L. dissectum to assess its activity against viruses{{citation |doi=10.1016/0378-8741(95)90037-3 |author=McCutcheon A.R. |author2=Roberts T.E. |author3=Gibbons E. |author4=Ellis S.M. |author5=Babiuk L.A. |author6=Hancock R.E.W. |author7=Towers G.H.N |title=Antiviral screening of British Columbian medicinal plants |journal=Journal of Ethnopharmacology |year=1995 |volume=49|issue=2 |pages=101–110|pmid=8847882 |pmc=7131204 }} and bacteria.{{citation |doi=10.1076/phbi.35.2.77.13284 |author=McCutcheon A.R. |author2=Stokes W.R. |author3=Thorson L.M. |author4=Ellis S.M. |author5=Hancock R.E.W. |author6=Towers G.H.N. |title=Anti-mycobacterial screening of British Columbian medicinal plants |journal=International Journal of Pharmacognosy |year=1997 |volume=35 |issue=2 |pages=77–83|doi-access=free }}

Lomatium dissectum is native to much of western North America, where it grows in varied habitat. It is found in coastal areas west of the Cascade Range (var. dissectum), the eastern slopes of the Cascade Range, Rocky Mountains, Klamath Mountains, eastern Transverse Ranges and the Sierra Nevada in California.

There are two varieties recognized, which have been treated as separate species (L. multifidum and L. dissectum) and as varieties of single species (L. dissectum var. multifidum and L. dissectum var. dissectum). In regions where both taxa co-occur, L. dissectum is still in flower when L. multifidum is producing fruit.{{Cite journal |last1=FEIST |first1=MARY ANN E. |last2=SMITH |first2=JAMES F. |last3=MANSFIELD |first3=DONALD H. |last4=DARRACH |first4=MARK |last5=MCNEILL |first5=RICHARD P. |last6=DOWNIE |first6=STEPHEN R. |last7=PLUNKETT |first7=GREGORY M. |last8=WILSON |first8=BARBARA L. |date=2017-08-01 |title=New Combinations in Lomatium (Apiaceae, Subfamily Apioideae) |url=http://dx.doi.org/10.11646/phytotaxa.316.1.11 |journal=Phytotaxa |volume=316 |issue=1 |pages=95 |doi=10.11646/phytotaxa.316.1.11 |issn=1179-3163}}

• Lomatium dissectum var. multifidum (Nutt.) R.P. McNeill & Darrach – throughout western North America; interior British Columbia, Alberta, Saskatchewan, Arizona, California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming{{Cite web |title=NatureServe Explorer 2.0 {{!}} Lomatium dissectum var. multifidum |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.156196/Lomatium_dissectum_var_multifidum |access-date=2024-06-30 |website=explorer.natureserve.org}} – south-facing slopes of shallow, rocky soil sites, at lower elevations – well-developed stalks, with yellow flowers.
• Lomatium dissectum var. dissectum (Nutt.) Mathias & Constance – west of the Cascade Range; coastal British Columbia (southeastern Vancouver Island and adjacent Gulf Islands{{Cite web |last=Garry Oak Ecosystem Recovery Team |first=GOERT |date=2007 |title=Species at Risk in Garry Oak & Associated Ecosystems in British Columbia (Lomatium dissectum var. dissectum) |url=https://goert.ca/wp/wp-content/uploads/SAR-factsheet-lomatium-dissectum.pdf |access-date=30 June 2024 |website=goert.ca}}) California, Oregon, Washington, disjunct in Idaho{{Cite web |title=NatureServe Explorer 2.0 {{!}} Lomatium dissectum var. dissectum |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.161608/Lomatium_dissectum_var_dissectum |access-date=2024-06-30 |website=explorer.natureserve.org}} – north-facing slopes of deep soil sites, at higher elevations – short-stalked or stalkless, with purple flowers (rarely yellow/purple).{{Cite web |title=E-Flora BC Atlas Page {{!}} Lomatium dissectum |url=http://linnet.geog.ubc.ca/Atlas/Atlas.aspx?sciname=Lomatium%20dissectum |access-date=2018-03-09 |archive-date=2018-03-10 |archive-url=https://web.archive.org/web/20180310074009/http://linnet.geog.ubc.ca/Atlas/Atlas.aspx?sciname=Lomatium%20dissectum |url-status=dead }}

Lomatium dissectum var. dissectum is considered imperilled in Canada, occurring in 20 or fewer extant locations.{{Cite web |title=Comprehensive Reports for Lomatium dissectum (fern-leaved desert-parsley) |url=https://a100.gov.bc.ca/pub/eswp/reports.do?elcode=PDAPI1B0G1 |access-date=2024-06-30 |website=a100.gov.bc.ca}}

Lomatium dissectum var. multifidum mature seeds.jpg|Mature seeds of var. multifidum

Lomatium dissectum var. dissectum green fruit 2.jpg|Green seeds of var. dissectum

{{Reflist|2}}

• {{Commons category-inline}}
• [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?329,426,440 Jepson Manual Treatment - Lomatium dissectum]
• [https://plants.usda.gov/java/profile?symbol=LODI USDA Plants Profile]
• [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Lomatium+dissectum Lomatium dissectum - Photo gallery]

{{Taxonbar|from=Q6669223}}

dissectum

Category:Flora of Western Canada

Category:Flora of the Western United States

Category:Flora of the Sierra Nevada (United States)

Category:Flora of California

Category:Natural history of the Transverse Ranges

Category:Taxa named by Lincoln Constance

Category:Taxa named by Mildred Esther Mathias

Category:Flora without expected TNC conservation status

{{Apiaceae-stub}}