View source for Dudleya abramsii subsp. setchellii

{{Short description|Species of succulent}}
{{Use dmy dates|date=April 2022}}
{{Infraspeciesbox
| image = SantaClaraDudleyaAndSerpentine.jpg
| status = LE
| status_system = ESA
| genus = Dudleya
| species = abramsii
| subspecies = setchellii
| authority = ([[Willis Linn Jepson|Jeps.]]) [[Reid Venable Moran|Moran]]
| synonyms = *''Cotyledon laxa'' var. ''setchellii'' <small>Jeps. (1901)</small>
*''Dudleya setchellii'' <small> (Jeps.) Britton & Rose (1903) </small>
*''Cotyledon setchellii'' <small>(Jeps.) Fedde (1904) </small>
*''Echeveria setchellii'' <small>(Jeps.) Nelson & Macbride (1913) </small>
*''Echeveria laxa'' var. ''setchellii'' <small>(Jeps.) Jepson (1936)</small>
*''Dudleya cymosa'' ssp. ''setchellii'' <small> (Jeps.) Moran (1957) </small>
}}
'''''Dudleya abramsii''''' '''subsp. ''setchellii''''', known by common name as the '''Santa Clara Valley dudleya''' or '''Santa Clara Valley liveforever''', is a member of the ''[[Dudleya]]'' [[genus]] of [[succulent plant|succulent]] perennials, members of the family [[Crassulaceae]]. The Santa Clara Valley dudleya, [[endemism|endemic]] to the [[Santa Clara Valley]] region in the southern [[San Francisco Bay Area]], was listed on 3 February 1995, as an [[endangered species]].<ref name="calflora">{{Cite web|date=2021|title=Dudleya abramsii ssp. setchellii|url=https://www.calflora.org/app/taxon?crn=10842|url-status=live|access-date=23 August 2021|website=Calflora|publisher=The Calflora Database|location=Berkeley, California|archive-url=https://web.archive.org/web/20210417114026/https://www.calflora.org/app/taxon?crn=10842 |archive-date=17 April 2021 }}</ref> It is considered to be a subspecies of ''[[Dudleya abramsii]],'' but its taxonomic status is still unclear. Its closest relative is [[Dudleya cymosa subsp. paniculata|''Dudleya cymosa'' subsp. ''paniculata'']], which is a morphologically similar sister taxon.''<ref>{{citation |url=http://www.theplantlist.org/tpl1.1/record/kew-2779007 |title=The Plant List |accessdate=9 July 2016}}</ref><ref name="MoranBRIT">{{Cite journal |last=Moran |first=Reid |date=2007 |title=Dudleya abramsii Rose subsp. setchellii (Jeps.) Moran, comb. nov. |url=https://brit.org/research/brit-press/journal-of-the-botanical-research-institute-of-texas/ |journal=Journal of the Botanical Research Institute of Texas |volume=1 |issue=2 |pages=1015 |via=}}</ref>''<ref name="Yost2013">{{Cite journal|last1=Yost|first1=J. M.|last2=Bontrager|first2=M.|last3=McCabe|first3=S. W.|last4=Burton|first4=D.|last5=Simpson|first5=M. G.|last6=Kay|first6=K. M.|last7=Ritter|first7=M.|date=2013|title=Phylogenetic relationships and evolution in Dudleya (Crassulaceae)|url=http://www.sci.sdsu.edu/herb/pdfs/Yost_etal2013-Dudleya-Crassulac.pdf|journal=Systematic Botany|volume=38|issue=4|pages=1096–1104|doi=10.1600/036364413X674760|s2cid=15715233}}</ref>

==Description==
A perennial [[Rosette (botany)|rosette]]-forming succulent, this species is characterized by pale yellow petals, a simple (not branching multiple times) inflorescence, and a restriction to [[Serpentine soil|serpentine]] soil.<ref>{{Cite web |title=Dudleya key to species |url=https://ucjeps.berkeley.edu/eflora/eflora_keys.php?key=10874 |access-date=2022-05-08 |website=Jepson eFlora |publisher=Jepson Flora Project}}</ref>

=== Morphology ===
This rosettes are anywhere from {{Cvt|2|-|9|cm|abbr=on|in}} wide, on top of [[Plant stem|stems]] (also referred to as [[Caudex|caudices]]) that are {{Cvt|10|-|20|mm|abbr=on|in}} wide. The stems may branch [[Dichotomy|dichotomously]] to form 1 to 5 rosettes. The leaves are [[Glossary of leaf morphology|shaped]] oblong-triangular to lance-elliptic to lanceolate, and have a [[glaucous]] surface. The leaves measure {{Cvt|3|-|8|cm|abbr=on|in}} long by {{Cvt|7|-|15|mm|abbr=on|in}} wide.<ref name="McCabe2012">{{Cite web |last=McCabe |first=Stephen Ward |date=2012 |title=Dudleya abramsii subsp. setchellii |url=https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=88959 |url-status=live |archive-url=https://web.archive.org/web/20160830020646/http://ucjeps.berkeley.edu:80/eflora/eflora_display.php?tid=88959 |archive-date=30 August 2016 |access-date=23 August 2021 |website=Jepson eFlora |publisher=Jepson Flora Project (eds.)}}</ref><ref name="MoranEfloras">{{Cite eFloras|1|250092074|Dudleya abramsii subsp. setchellii|last=Moran|first=Reid|access-date=7 May 2022}}</ref>

The [[Peduncle (botany)|peduncle]] is {{Cvt|5|-|20|cm|abbr=on|in}} tall and {{Cvt|2|-|4|mm|abbr=on|in}} wide. The lower [[bract]]s on the peduncle measure {{Cvt|10|-|25|mm|abbr=on|in}} long. There are typically 2 to 3 first degree branches on the [[inflorescence]], which are oriented in an ascending fashion and usually do not bifurcate further. On the branches are [[Pedicel (botany)|pedicels]], measuring {{Cvt|2|-|7|mm|abbr=on|in}} in length, holding the flowers. The flowers have [[sepal]]s that are {{Cvt|2|-|5|mm|abbr=on|in}} long, and shaped deltate. The [[petal]]s are {{Cvt|8|-|13|mm|abbr=on|in}} long by {{Cvt|2.5|-|3.5|mm|abbr=on|in}} wide, and shaped elliptic, with their tips acute. The lower parts of the petals are [[connation|fused]] {{Cvt|1|-|2.5|mm|abbr=on|in}} the way up to form a tube. The petals are colored a pale yellow.<ref name="McCabe2012" /><ref name="MoranEfloras" />

== Taxonomy ==
{{Cladogram|align=left|title=Cladogram of ''Dudleya setchellii''
|cladogram={{clade |state=dashed |label1=''Virens'' clade |1={{clade |1={{clade |1=''D. abramsii'' subsp. ''setchellii'' |2=[[Dudleya cymosa subsp. paniculata|''D. cymosa'' subsp. ''paniculata'']]}} |2=[[Dudleya cymosa subsp. cymosa|''D. cymosa subsp. cymosa'']]}} }}
}}
''Dudleya abramsii'' subsp. ''setchellii'' has undergone numerous changes in its taxonomic classification. Originally placed a subspecies of ''[[Cotyledon (genus)|Cotyledon]] laxa'' / ''[[Echeveria]] laxa'',<ref>{{Cite journal|last=Jepson|first=Willis Linn|date=1901|title=Cotyledon laxa var. setchellii|url=https://www.crassulaceae.com/botanik/pflanzen/botanzeige_scan_en.asp?gnr=1510&scan=132900&cat=4&name=Cotyledon%20laxa%20var.%20setchellii|journal=Flora of Western Middle California|pages=267|via=crassulaceae.com}}</ref><ref>{{Cite journal|last=Jepson|first=Willis Linn|date=1936|title=Echeveria laxa var. setchellii|journal=Flora of California|volume=2|pages=114}}</ref> an antiquated synonym for ''[[Dudleya caespitosa]]'', botanists [[Nathaniel Lord Britton]] and [[Joseph Nelson Rose]] placed it as a separate species within Dudleya in 1903.<ref>{{Cite journal|last1=Britton|first1=Nathaniel Lord|last2=Rose|first2=Joseph Nelson|date=1903|title=Dudleya setchellii|journal=Bulletin of the New York Botanical Garden|volume=3|issue=9|pages=15}}</ref> In a 1957 issue of [[Madroño (journal)|Madroño]], botanist [[Reid Moran]] revised ''setchellii'' as a subspecies of ''[[Dudleya cymosa]]''.<ref>{{Cite journal|last=Moran|first=Reid|date=1957|title=Dudleya cymosa ssp. setchellii|journal=Madroño|volume=14|issue=3|pages=108}}</ref> ''Cotyledon'' ''caespitosa'' var. ''paniculata'', now [[Dudleya cymosa subsp. paniculata|''Dudleya'' ''cymosa'' subsp. ''paniculata'']], was merged into ''setchellii''.<ref name="Nakai1987">{{Cite journal|last=Nakai|first=K. M.|date=1987|title=SOME NEW AND RECONSIDERED CALIFORNIA DUDLEYA (CRASSULACEAE)|journal=Madroño|volume=34|issue=4|pages=338}}</ref> Almost half a century later, Moran and other botanists returned to ''setchellii'', and again revised it as a subspecies of ''Dudleya abramsii.''<ref name="MoranBRIT" />

It is visually similar to and sometimes indistinguishable from ''Dudleya cymosa'' subsp. ''paniculata''.<ref name="Nakai1987" /> Recent [[Phylogenetics|phylogenetic]] analysis may in fact place ''setchellii'' back into a subspecies of ''D. cymosa'', as it is most closely related to ''D. c.'' subsp. ''paniculata''.<ref name="Yost2013" /> Reid Moran, who combined it back into ''D. abramsii'', suggests that it owes a superficial resemblance to ''Dudleya abramsii'' subsp. ''murina''.<ref name="MoranBRIT" />
[[File:Dudleya setchellii (15390385109).jpg|thumb|The inflorescence and flowers]]

==Distribution==
''Dudleya abramsii'' subsp. ''setchellii'' is found only in the Coyote Valley area of southern [[Santa Clara County, California]], mostly on rocky outcrops within [[serpentine soil|serpentine]] grasslands on [[Tulare Hill]] and the [[Santa Teresa Hills]] west of [[Coyote Creek (Santa Clara County)|Coyote Creek]] in south [[San Jose, California|San Jose]] and south of Metcalf Canyon east of Coyote Creek.<ref name="calflora" /><ref name="MoranBRIT" /><ref name="McCabe2012" />

== Gallery ==
<gallery widths="225">
File:Dudleya abramsii setchellii 74620648.jpg|Detail of the flowers and inflorescence in bloom
File:Dudleya abramsii setchellii 74362856.jpg|Detail of the flowers and inflorescence in bloom
File:Dudleya abramsii setchellii 18104818.jpg|Detail of the flowers and inflorescence in bloom
File:SC Valley Dudleya 4 (16750380870).jpg|Growing in habitat
File:SC Valley Dudleya 2 (16937824965).jpg|Plants in habitat
</gallery>

== See also ==

* [[Dudleya cymosa subsp. paniculata|''Dudleya cymosa'' subsp. ''paniculata'']]
* [[Dudleya abramsii subsp. abramsii|''Dudleya abramsii'' subsp. ''abramsii'']]
* ''[[Dudleya farinosa]]''

==References==
{{Reflist}}

==External links==
*[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?3284,3295,3333 Jepson Manual Treatment – ''Dudleya setchellii'']
*[https://plants.usda.gov/java/profile?symbol=DUSE USDA Plants Profile: ''Dudleya setchellii'']
*[http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Dudleya+setchellii ''Dudleya setchellii'' – Photo gallery]

{{Taxonbar|from=Q5312064}}

[[Category:Dudleya|abramsii setchellii]]
[[Category:Endemic flora of California]]
[[Category:Natural history of the California chaparral and woodlands]]
[[Category:Natural history of Santa Clara County, California]]
[[Category:Taxa named by Willis Linn Jepson]]
[[Category:Endemic flora of the San Francisco Bay Area]]
[[Category:Taxa named by Reid Venable Moran]]