View source for Leptarrhena

{{Treatment/ID
|accepted_name=Leptarrhena
|accepted_authority=R. Brown
|publications={{Treatment/Publication
|title=Chlor. Melvill.,
|place=15. 1823 ,
}}
|basionyms=
|synonyms=
|hierarchy=Saxifragaceae;Leptarrhena
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Saxifragaceae]]</div><div class="higher-taxon"><small>genus</small>[[Leptarrhena]]</div></div>
|etymology=Greek leptos, slender, and arrhen, male, alluding to stamen filaments
|volume=Volume 8
|mention_page=page 43, 45, 48, 132
|treatment_page=page 131
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism architecture;whole_organism architecture;whole_organism growth form"><b>Herbs </b>rhizomatous, not stoloniferous;</span> <span class="statement" id="st-d0_s1" data-properties="caudex architecture or pubescence;caudex architecture or shape;leaf-base duration">caudex scaly, not cormlike, with persistent leaf-bases.</span> <span class="statement" id="st-d0_s2" data-properties="flowering-stem orientation;flowering-stem orientation;flowering-stem architecture;flowering-stem atypical some measurement;flowering-stem atypical some measurement;flowering-stem some measurement;flowering-stem pubescence;flowering-stem pubescence;flowering-stem pubescence"><b>Flowering-</b>stems ascending or erect, leafy, (8–) 15–35 (–48) cm, glabrous proximally, puberulent and stipitate-glandular distally.</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="basal leaf condition">basal leaves marcescent;</span> <span class="statement" id="st-d0_s5" data-properties="cauline leaf quantity;cauline leaf architecture or fixation;cauline leaf size">cauline leaves 1–4, clasping, smaller distally;</span> <span class="statement" id="st-d0_s6" data-properties="stipule prominence;stipule fusion">stipules inconspicuous, adnate to petiole;</span> <span class="statement" id="st-d0_s7" data-properties="petiole presence;cauline leaf presence;basal leaf pubescence">petiole absent in cauline leaves, present in basal, glabrous;</span> <span class="statement" id="st-d0_s8" data-properties="blade shape;blade shape;base shape;ultimate margin architecture or shape;ultimate margin architecture or shape;apex shape;apex shape">blade obovate to elliptic, unlobed, base tapered, ultimate margins crenate-serrate, sometimes entire in cauline leaves, apex obtuse or rounded, surfaces glabrous or sparsely glandular abaxially;</span> <span class="statement" id="st-d0_s9" data-properties="surface pubescence;surface pubescence;surface architecture or shape">venation pinnate.</span> <span class="statement" id="st-d0_s10" data-properties="inflorescence position or structure subtype;inflorescence architecture;inflorescence architecture;cyme architecture"><b>Inflorescences </b>compound cymes, terminal from terminal bud of rosette, (18–) 26–100-flowered, bracteate.</span> <span class="statement" id="st-d0_s11" data-properties="hypanthium fusion;hypanthium position;hypanthium quantity;portion fusion;portion presence;portion coloration;portion coloration"><b>Flowers:</b> hypanthium adnate to proximal 1/4–1/2 of ovary, free portion absent, green proximally, usually purplish distally;</span> <span class="statement" id="st-d0_s12" data-properties="sepal quantity;sepal coloration">sepals 5, greenish;</span> <span class="statement" id="st-d0_s13" data-properties="petal quantity;petal coloration">petals 5, white;</span> <span class="statement" id="st-d0_s14" data-properties="nectary disc presence">nectary disc absent;</span> <span class="statement" id="st-d0_s15" data-properties="stamen quantity">stamens 10;</span> <span class="statement" id="st-d0_s16" data-properties="">(anthers dehiscent by broad, terminal openings);</span> <span class="statement" id="st-d0_s17" data-properties="filament arrangement or course or shape">filaments linear;</span> <span class="statement" id="st-d0_s18" data-properties="ovary quantity;ovary position;ovary architecture or structure in adjective form;carpel fusion">ovary 1/4–1/2 inferior, 2-locular, carpels connate proximally;</span> <span class="statement" id="st-d0_s19" data-properties="flower placentation">placentation axile;</span> <span class="statement" id="st-d0_s20" data-properties="style quantity">styles 2;</span> <span class="statement" id="st-d0_s21" data-properties="stigma quantity">stigmas 2.</span> <span class="statement" id="st-d0_s22" data-properties="capsule architecture or shape;capsule architecture or shape"><b>Capsules </b>folliclelike, 2-beaked.</span> <span class="statement" id="st-d0_s23" data-properties=""><b>Seeds </b>yellowish-brown or tan, shiny, fusiform, ribbed (at least over embryo).</span> <span class="statement" id="st-d0_s24" data-properties="seed coloration;seed coloration;seed reflectance;seed shape;seed architecture or shape;x chromosome quantity">x = 7.</span><!--

-->{{Treatment/Body
|distribution=nw North America
|discussion=<p>Species 1: nw North America.</p><!--
--><p>R. J. Gornall (1985) reviewed the nomenclature of Leptarrhena. Based on molecular data, D. E. Soltis et al. (1993) placed it and the Asian, monospecific Tanakaea Franchet & Savatier sister in a group also including Boykinia, Jepsonia, Sullivantia, and Telesonix. Anther dehiscence in Leptarrhena and Tanakaea, which is by broad, terminal openings as opposed to longitudinal slits, appears to be unique in Saxifragaceae (H. G. A. Engler 1930). Soltis (1984d) found the karyotype of Leptarrhena to be distinct within the family.</p><!--
--><p>Species 1</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Leptarrhena
|author=Craig C. Freeman;Richard K. Rabeler
|authority=R. Brown
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Saxifragaceae
|illustrator=Yevonn Wilson-Ramsey
|illustration copyright=Flora of North America Association
|distribution=nw North America
|reference=None
|publication title=Chlor. Melvill.,
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V8/V8_261.xml
|genus=Leptarrhena
|apex shape=rounded;obtuse
|basal leaf condition=marcescent
|basal leaf pubescence=glabrous
|base shape=tapered
|blade shape=unlobed;obovate;elliptic
|capsule architecture or shape=2-beaked;folliclelike
|carpel fusion=connate
|caudex architecture or pubescence=scaly
|caudex architecture or shape=not cormlike
|cauline leaf architecture or fixation=clasping
|cauline leaf presence=absent
|cauline leaf quantity=1;4
|cauline leaf size=smaller
|cyme architecture=compound
|filament arrangement or course or shape=linear
|flower placentation=axile
|flowering-stem architecture=leafy
|flowering-stem atypical some measurement=35cm;48cm
|flowering-stem orientation=erect;ascending
|flowering-stem pubescence=stipitate-glandular;puberulent;glabrous
|flowering-stem some measurement=15cm;35cm
|hypanthium fusion=adnate
|hypanthium position=proximal
|hypanthium quantity=1/4;1/2
|inflorescence architecture=bracteate;(18-)26-100-flowered
|inflorescence position or structure subtype=terminal
|leaf position=cauline
|leaf-base duration=persistent
|nectary disc presence=absent
|ovary architecture or structure in adjective form=2-locular
|ovary position=inferior
|ovary quantity=1/4;1/2
|petal coloration=white
|petal quantity=5
|petiole presence=absent
|portion coloration=purplish;green
|portion fusion=free
|portion presence=absent
|seed architecture or shape=ribbed
|seed coloration=tan;yellowish-brown
|seed reflectance=shiny
|seed shape=fusiform
|sepal coloration=greenish
|sepal quantity=5
|stamen quantity=10
|stigma quantity=2
|stipule fusion=adnate
|stipule prominence=inconspicuous
|style quantity=2
|surface architecture or shape=pinnate
|surface pubescence=glandular;glabrous
|ultimate margin architecture or shape=entire;crenate-serrate
|whole_organism architecture=not stoloniferous;rhizomatous
|whole_organism growth form=herb
|x chromosome quantity=7
}}<!--

-->[[Category:Treatment]][[Category:Saxifragaceae]]