View source for Jepsonia

{{Treatment/ID
|accepted_name=Jepsonia
|accepted_authority=Small
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=23: 18, plate 256. 1896 ,
}}
|basionyms=
|synonyms=
|hierarchy=Saxifragaceae;Jepsonia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Saxifragaceae]]</div><div class="higher-taxon"><small>genus</small>[[Jepsonia]]</div></div>
|etymology=For Willis Linn Jepson, 1867–1946, California botanist
|volume=Volume 8
|mention_page=page 43, 44, 46, 119, 120, 132
|treatment_page=page 118
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism architecture;whole_organism architecture;whole_organism growth form"><b>Herbs,</b> (acaulescent, heterostylous), not rhizomatous, not stoloniferous;</span> <span class="statement" id="st-d0_s1" data-properties="caudex architecture;caudex architecture;caudex shape;caudex shape;caudex architecture or shape;caudex texture">caudex branched or unbranched, ovoid or flat, cormlike, fleshy, without scales.</span> <span class="statement" id="st-d0_s2" data-properties="flowering-stem orientation;flowering-stem orientation;flowering-stem architecture;flowering-stem some measurement;flowering-stem pubescence;flowering-stem coating"><b>Flowering-</b>stems (usually appearing in autumn or winter after basal leaves have withered), erect or ascending, leafless, 3–28 cm, stipitate-glandular, slightly viscid.</span> <span class="statement" id="st-d0_s3" data-properties="leaf position"><b>Leaves </b>in basal rosette and cauline;</span> <span class="statement" id="st-d0_s4" data-properties="stipule presence">stipules present;</span> <span class="statement" id="st-d0_s5" data-properties="petiole pubescence">petiole stipitate-glandular;</span> <span class="statement" id="st-d0_s6" data-properties="blade shape;blade shape;base shape;ultimate margin shape;tooth architecture or shape;apex shape">blade ovate to suborbiculate or orbiculate-reniform, shallowly lobed, base cordate, ultimate margins crenate with callous-apiculate teeth, apex obtuse to rounded, surfaces hairy;</span> <span class="statement" id="st-d0_s7" data-properties="surface pubescence;surface architecture">venation palmate.</span> <span class="statement" id="st-d0_s8" data-properties="inflorescences cymose-panicle architecture;flower architecture or arrangement or growth form;flower architecture"><b>Inflorescences </b>cymose-panicles, (origin of inflorescences not readily resolvable), 2–17-flowered, sometimes flowers solitary, bracteate, (simple or branched distally, glandular-viscid or glabrate).</span> <span class="statement" id="st-d0_s9" data-properties="flower architecture"><b>Flowers </b>heterostylous;</span> <span class="statement" id="st-d0_s10" data-properties="hypanthium fusion;hypanthium coloration">hypanthium free from ovary except at base, yellow-green to pinkish;</span> <span class="statement" id="st-d0_s11" data-properties="sepal quantity;sepal coloration">sepals 5, yellow-green to pinkish;</span> <span class="statement" id="st-d0_s12" data-properties="petal quantity;petal coloration;vein coloration">petals 5, white, veins prominently colored, (spatulate to elliptic, glabrous);</span> <span class="statement" id="st-d0_s13" data-properties="nectary tissue prominence">nectary tissue not visible;</span> <span class="statement" id="st-d0_s14" data-properties="stamen quantity">stamens 10;</span> <span class="statement" id="st-d0_s15" data-properties="filament shape">filaments subulate, (alternate ones surpassing sepals);</span> <span class="statement" id="st-d0_s16" data-properties="ovary position;ovary architecture or structure in adjective form">ovary superior, 2-locular, carpels connate to middle;</span> <span class="statement" id="st-d0_s17" data-properties="carpel fusion;carpel position;carpel placentation">placentation axile (appearing marginal);</span> <span class="statement" id="st-d0_s18" data-properties="style quantity">styles 2;</span> <span class="statement" id="st-d0_s19" data-properties="stigma quantity">stigmas 2.</span> <span class="statement" id="st-d0_s20" data-properties="capsule architecture or shape;capsule architecture or shape"><b>Capsules </b>folliclelike, 2-beaked.</span> <span class="statement" id="st-d0_s21" data-properties="base course;wing architecture or coloration or relief;wing dehiscence or orientation;wing course;ridge architecture or coloration or relief;ridge dehiscence or orientation;ridge course"><b>Seeds </b>brownish, irregular in outline with pinched, curved base, reticulate with longitudinal wings or ridges.</span> <span class="statement" id="st-d0_s22" data-properties="seed coloration;seed architecture or course;x chromosome quantity">x = 7.</span><!--

-->{{Treatment/Body
|distribution=Calif.;nw Mexico
|discussion=<p>Species 3 (3 in the flora).</p><!--
--><p>Jepsonia is characterized by heterostylous flowers that are produced in the autumn after summer drought; some flowers have long styles and short stamens; others have short styles and long stamens. The floral differences associated with heterostyly within populations in this genus are part of an incompatibility mechanism that prevents self-fertilization. Leaves appear after flowering and persist through the winter if moisture is available. Rarely, leaves and flowers are present simultaneously. All three species of Jepsonia also produce a secondary taproot each year. This structure begins to grow after seasonal rains and shrivels before flowering begins. It apparently acts as a contractile root. The three species in this genus are narrow allopatric endemics.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Caudices unbranched, ovoid to spheric; leaves 1(-3); inflorescences 1-5(-10)-flowered; hypanthia 2+ times sepals; sw California, n Baja California.
|[[Jepsonia parryi|Jepsonia parryi]]
|-id=key-0-1
|1
|Caudices branched, ovoid or flat; leaves 2-3; inflorescences (3-)4-17(-25)-flowered; hypanthia ± equaling or to 1.5 times sepals; Sierra Nevada foothills or Channel Islands
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Peduncles pink or reddish, branched near middle; petals withering; pollen bluish or cream; seeds light brown.
|[[Jepsonia heterandra|Jepsonia heterandra]]
|-id=key-0-2
|2
|Peduncles greenish or olive, branched distally; petals persistent; pollen yellowish; seeds dark brown.
|[[Jepsonia malvifolia|Jepsonia malvifolia]]
|}
</div></div><!--

-->{{#Taxon:
name=Jepsonia
|author=Debra K. Trock
|authority=Small
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Saxifragaceae
|illustrator=Yevonn Wilson-Ramsey
|illustration copyright=Flora of North America Association
|distribution=Calif.;nw Mexico
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V8/V8_234.xml
|genus=Jepsonia
|apex shape=obtuse;rounded
|base course=curved
|base shape=cordate
|blade shape=lobed;ovate;suborbiculate or orbiculate-reniform
|capsule architecture or shape=2-beaked;folliclelike
|carpel fusion=connate
|carpel placentation=axile
|carpel position=middle
|caudex architecture=unbranched;branched
|caudex architecture or shape=cormlike
|caudex shape=flat;ovoid
|caudex texture=fleshy
|filament shape=subulate
|flower architecture=heterostylous;bracteate
|flower architecture or arrangement or growth form=solitary
|flowering-stem architecture=leafless
|flowering-stem coating=viscid
|flowering-stem orientation=ascending;erect
|flowering-stem pubescence=stipitate-glandular
|flowering-stem some measurement=3cm;28cm
|hypanthium coloration=yellow-green;pinkish
|hypanthium fusion=free
|inflorescences cymose-panicle architecture=2-17-flowered
|leaf position=cauline
|nectary tissue prominence=not visible
|ovary architecture or structure in adjective form=2-locular
|ovary position=superior
|petal coloration=white
|petal quantity=5
|petiole pubescence=stipitate-glandular
|ridge architecture or coloration or relief=reticulate
|ridge course=curved
|ridge dehiscence or orientation=longitudinal
|seed architecture or course=irregular
|seed coloration=brownish
|sepal coloration=yellow-green;pinkish
|sepal quantity=5
|stamen quantity=10
|stigma quantity=2
|stipule presence=absent
|style quantity=2
|surface architecture=palmate
|surface pubescence=hairy
|tooth architecture or shape=callous-apiculate
|ultimate margin shape=crenate
|vein coloration=colored
|whole_organism architecture=not stoloniferous;not rhizomatous
|whole_organism growth form=herb
|wing architecture or coloration or relief=reticulate
|wing course=curved
|wing dehiscence or orientation=longitudinal
|x chromosome quantity=7
}}<!--

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