View source for Geum rossii

{{Treatment/ID
|accepted_name=Geum rossii
|accepted_authority=(R. Brown) Seringe in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=2: 553. 1825
|year=1825
}}
|common_names=Ross’s avens
|basionyms={{Treatment/ID/Basionym
|name=Sieversia rossii
|authority=R. Brown
|rank=species
|publication_title=Chlor. Melvill.,
|publication_place=18, plate C. 1823
}}
|synonyms={{Treatment/ID/Synonym
|name=Acomastylis rossii
|authority=(R. Brown) Greene
|rank=species
}} {{Treatment/ID/Synonym
|name=Geum rossii var. depressum
|authority=(Greene) C. L. Hitchcock
|rank=variety
}} {{Treatment/ID/Synonym
|name=G. rossii var. turbinatum
|authority=(Rydberg) C. L. Hitchcock
|rank=variety
}} {{Treatment/ID/Synonym
|name=G. turbinatum
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=S. gracilipes
|authority=
|rank=species
}}
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Colurieae;Geum;Geum rossii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Rosoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Colurieae]]</div><div class="higher-taxon"><small>genus</small>[[Geum]]</div><div class="higher-taxon"><small>species</small>[[Geum rossii]]</div></div>
|volume=Volume 9
|mention_page=page 60, 64
|treatment_page=page 63
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism architecture;whole_organism growth form"><b>Plants </b>subscapose.</span> <span class="statement" id="st-d0_s1" data-properties="stem some measurement;stem pubescence;stem pubescence;hair some measurement;hair architecture or function or pubescence"><b>Stems </b>4–28 cm, glabrous or downy, hairs to 1 mm, sometimes septate-glandular.</span> <span class="statement" id="st-d0_s2" data-properties="basal leaf some measurement;blade architecture or shape;leaflet size;leaflet quantity;leaflet arrangement;minor quantity;terminal leaflet size;lateral size"><b>Leaves:</b> basal 3–13 cm, blade pinnate to interruptedly pinnate, major leaflets 13–26, alternating with 0–14 minor ones, terminal leaflet slightly larger than major laterals;</span> <span class="statement" id="st-d0_s3" data-properties="cauline leaf some measurement;stipule fusion;stipule prominence;blade shape;blade arrangement;blade architecture;blade shape">cauline 0.7–2 cm, stipules adnate to leaf, indistinguishable from pair of lobes, blade bractlike, not resembling basal, alternate, simple, pinnatifid to 3-fid.</span> <span class="statement" id="st-d0_s4" data-properties="inflorescence architecture"><b>Inflorescences </b>1–3 (–4) -flowered.</span> <span class="statement" id="st-d0_s5" data-properties="pedicel pubescence;pedicel architecture or function or pubescence"><b>Pedicels </b>woolly, sometimes glandular.</span> <span class="statement" id="st-d0_s6" data-properties="flower orientation"><b>Flowers </b>erect;</span> <span class="statement" id="st-d0_s7" data-properties="epicalyx bractlet some measurement">epicalyx bractlets 1.5–7 mm;</span> <span class="statement" id="st-d0_s8" data-properties="hypanthium coloration;hypanthium coloration">hypanthium green, slightly purple-tinged to strongly purple;</span> <span class="statement" id="st-d0_s9" data-properties="sepal orientation;sepal some measurement">sepals erect to erect-spreading, 3–10 mm;</span> <span class="statement" id="st-d0_s10" data-properties="petal orientation;petal coloration;petal shape;petal atypical some measurement;petal some measurement;petal length or size">petals spreading, yellow, obovate to nearly orbiculate, 5–12 (–17) mm, longer than sepals, apex broadly rounded to irregularly emarginate.</span> <span class="statement" id="st-d0_s11" data-properties=""><b>Fruiting </b>tori sessile, glabrous.</span> <span class="statement" id="st-d0_s12" data-properties="apex shape;apex architecture;apex pubescence;whole-organism duration;whole-organism architecture;whole-organism atypical some measurement;whole-organism some measurement"><b>Fruiting </b>styles wholly persistent, not geniculate-jointed, 2–5 (–10) mm, apex not hooked, glabrous throughout or pilose only at base.</span> <span class="statement" id="st-d0_s13" data-properties="apex shape;apex pubescence;apex pubescence;2n chromosome quantity">2n = 56.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Alpine and arctic tundra, rocky slopes, often in gravelly or peaty soil
|elevation=0–4000 m
|distribution=Greenland;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Ariz.;Colo.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Utah;Wash.;Wyo.;e Asia (Russian Far East)
|discussion=<p>The variability accommodated here in Geum rossii was distributed by earlier monographers such as P. A. Rydberg (1913b) and F. Bolle (1933) among a half dozen species. W. Gajewski (1957) reduced them to two species, G. rossii and G. turbinatum; most recent taxonomists have recognized the two taxa as subspecies or varieties of a single species. The large geographic discontinuity between the Rocky Mountain and arctic ranges makes it easy for those wishing to follow this tradition. No one morphologic character or combination of characters neatly separates the arctic plants from those of the Rockies.</p><!--
--><p>Where their ranges overlap in Alaska, Geum rossii hybridizes with G. calthifolium to form sterile plants known as G. ×macranthum (Kearney ex Rydberg) B. Boivin; see discussion under 4. G. schofieldii.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Geum rossii
|authority=(R. Brown) Seringe in A. P. de Candolle and A. L. P. P. de Candolle
|rank=species
|parent rank=genus
|synonyms=Acomastylis rossii;Geum rossii var. depressum;G. rossii var. turbinatum;G. turbinatum;S. gracilipes
|basionyms=Sieversia rossii
|family=Rosaceae
|phenology=Flowering summer.
|habitat=Alpine and arctic tundra, rocky slopes, often in gravelly or peaty soil
|elevation=0–4000 m
|distribution=Greenland;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Ariz.;Colo.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Utah;Wash.;Wyo.;e Asia (Russian Far East)
|reference=None
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1825
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V9/V9_88.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Colurieae
|genus=Geum
|species=Geum rossii
|2n chromosome quantity=56
|apex architecture=sessile
|apex pubescence=pilose;glabrous;glabrous
|apex shape=not hooked;broadly rounded;irregularly emarginate
|basal leaf some measurement=3cm;13cm
|blade architecture=simple
|blade architecture or shape=pinnate;interruptedly pinnate
|blade arrangement=not alternate
|blade shape=pinnatifid;3-fid
|cauline leaf some measurement=0.7cm;2cm
|epicalyx bractlet some measurement=1.5mm;7mm
|flower orientation=erect
|hair architecture or function or pubescence=septate-glandular
|hair some measurement=0mm;1mm
|hypanthium coloration=slightly purple-tinged;strongly purple
|inflorescence architecture=1-3(-4)-flowered
|lateral size=major
|leaflet arrangement=alternating
|leaflet quantity=13;26
|leaflet size=major
|minor quantity=0;14
|pedicel architecture or function or pubescence=glandular
|pedicel pubescence=woolly
|petal atypical some measurement=12mm;17mm
|petal coloration=yellow
|petal length or size=longer
|petal orientation=spreading
|petal shape=obovate;nearly orbiculate
|petal some measurement=5mm;12mm
|sepal orientation=erect;erect-spreading
|sepal some measurement=3mm;10mm
|stem pubescence=downy;glabrous
|stem some measurement=4cm;28cm
|stipule fusion=adnate
|stipule prominence=indistinguishable
|terminal leaflet size=slightly larger
|whole-organism architecture=not geniculate-jointed
|whole-organism atypical some measurement=5mm;10mm
|whole-organism duration=persistent
|whole-organism some measurement=2mm;5mm
|whole_organism architecture=subscapose
|whole_organism growth form=plant
}}<!--

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