View source for Oryzopsis ← Oryzopsis You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Oryzopsis |accepted_authority=Michx. |publications= |basionyms= |synonyms= |hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Stipeae;Oryzopsis |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Pooideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Stipeae]]</div><div class="higher-taxon"><small>genus</small>[[Oryzopsis]]</div></div> |volume=Volume 24 |mention_page= |treatment_page=page 167 }}<!-- --><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>perennial;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism growth form;whole_organism architecture;whole_organism growth form">cespitose, not rhizomatous.</span> <span class="statement" id="st-d0_s2" data-properties="culm some measurement;culm orientation;culm orientation;culm position;culm architecture;culm position"><b>Culms </b>25-65 cm, erect or spreading, basal branching extravaginal;</span> <span class="statement" id="st-d0_s3" data-properties="prophyll prominence">prophylls not visible;</span> <span class="statement" id="st-d0_s4" data-properties="node pubescence">nodes glabrous.</span> <span class="statement" id="st-d0_s5" data-properties="leaf position"><b>Leaves </b>mostly basal;</span> <span class="statement" id="st-d0_s6" data-properties="cleistogene development">cleistogenes not developed;</span> <span class="statement" id="st-d0_s7" data-properties="sheath architecture;sheath pubescence">sheaths open, glabrous;</span> <span class="statement" id="st-d0_s8" data-properties="auricle presence">auricles absent;</span> <span class="statement" id="st-d0_s9" data-properties="ligule texture;ligule length;ligule shape;ligule architecture or pubescence or shape">ligules membranous, longest at the sides or rounded, ciliate;</span> <span class="statement" id="st-d0_s10" data-properties="leaf blade some measurement;leaf blade coloration;leaf blade orientation;leaf blade orientation;base architecture;base position;cauline leaf-blade size;blade-leaf distance">blades of basal leaves 30-90 cm, remaining green over winter, erect when young, recumbent in the fall, bases twisted, placing the abaxial surfaces uppermost, cauline leaf-blades reduced, flag leaf-blades 2-12 mm, conspicuously narrower than the top of the sheath.</span> <span class="statement" id="st-d0_s11" data-properties="inflorescences panicle condition or size"><b>Inflorescences </b>panicles, contracted.</span> <span class="statement" id="st-d0_s12" data-properties="spikelet some measurement;floret quantity"><b>Spikelets </b>5-7.5 mm, with 1 floret;</span> <span class="statement" id="st-d0_s13" data-properties="">rachillas not prolonged beyond the base of the floret;</span> <span class="statement" id="st-d0_s14" data-properties="rachilla length">disarticulation above the glumes, beneath the floret.</span> <span class="statement" id="st-d0_s15" data-properties="glume size;glume architecture;apex shape"><b>Glumes </b>subequal, 6-10-veined, apices mucronate;</span> <span class="statement" id="st-d0_s16" data-properties="floret shape">florets terete to laterally compressed;</span> <span class="statement" id="st-d0_s17" data-properties="callus quantity;callus length;distal portion pubescence">calluses usually less than 1/5 the length of the florets, blunt, distal portions pilose;</span> <span class="statement" id="st-d0_s18" data-properties="lemma texture;lemma pubescence;lemma architecture;margin arrangement;margin shape;lemma-awn junction life cycle;lemma-awn junction architecture or shape;lemma-awn junction prominence;lobe some measurement">lemmas coriaceous, pubescent at least basally, 3-5 (9) -veined, margins strongly overlapping at maturity, awned, lemma-awn junction conspicuous, lobed, lobes 0.1-0.2 mm;</span> <span class="statement" id="st-d0_s19" data-properties="awn course;awn duration">awns more or less straight, deciduous;</span> <span class="statement" id="st-d0_s20" data-properties="palea texture;palea prominence;palea architecture;palea prominence or shape">paleas similar to the lemmas in length, texture, and pubescence, concealed by the lemmas, 2-veined, flat between the veins;</span> <span class="statement" id="st-d0_s21" data-properties="lodicule quantity;lodicule fusion;lodicule texture;lodicule architecture">lodicules 2, free, membranous, 2-veined;</span> <span class="statement" id="st-d0_s22" data-properties="anther quantity">anthers 3;</span> <span class="statement" id="st-d0_s23" data-properties="style quantity;branch quantity">styles 1, with 2 branches;</span> <span class="statement" id="st-d0_s24" data-properties="ovary pubescence">ovaries glabrous.</span> <span class="statement" id="st-d0_s25" data-properties=""><b>Caryopses </b>falling with the lemma and palea.</span> <span class="statement" id="st-d0_s26" data-properties="caryopse life cycle;x chromosome quantity;x chromosome quantity">x = 11, 12.</span><!-- -->{{Treatment/Body |distribution=Wash.;Wis.;W.Va.;Colo.;Wyo.;N.H.;N.J.;N.Mex.;N.Y.;Pa.;R.I.;Va.;Conn.;Mass.;Maine;Vt.;Ill.;Ind.;Iowa;Idaho;Md.;Ohio;Utah;Minn.;Mich.;N.Dak.;S.Dak.;Mont.;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Labr.);N.S.;N.W.T.;Ont.;P.E.I.;Que.;Sask.;Yukon |discussion=<p>Oryzopsis is treated here as a monospecific genus that is restricted to North America. Hitchcock (1951) and Johnson (1945) treated it as including both Eurasian and North American taxa; Freitag (1975) and Tutin (1980) placed the Eurasian species in a separate genus, Piptatherum. Kam and Maze (1974) demonstrated that O. asperifolia differs from both North American and Eurasian species previously included in Oryzopsis in the development of its floret and callus, and in having 2-veined lodicules. Phylogenetic studies based on ITS sequence data have not yielded clear support for any particular treatment of Oryzopsis; they are consistent with the treatment presented here. The North American species previously included in Oryzopsis have been transferred to Achnatherum and Piptatherum.</p> |tables= |references={{Treatment/Reference |id=dore1980b |text=Dore, W.G. and J. McNeill. 1980. Grasses of Ontario. Research Branch, Agriculture Canada Monograph No. 26. Canadian Government Publishing Centre, Hull, Quebec, Canada. 566 pp. }}{{Treatment/Reference |id=freitag1975b |text=Freitag, H. 1975. The genus Piptatherum (Gramineae) in southwest Asia. Notes Roy. Bot. Gard. Edinburgh 33:341-408 }}{{Treatment/Reference |id=hitchcock1951a |text=Hitchcock, A.S. 1951. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D.A. Miscellaneous Publication No. 200. U.S. Government Printing Office, Washington, D.C., U.S.A. 1051 pp. }}{{Treatment/Reference |id=jacobs2006a |text=Jacobs, S.W.L., R. Bayer, J. Everett, M.O. Arriaga, M.E. Barkworth, A. Sabin-Badereau, M.A. Torres, F. Vazquez, and N. Bagnall. 2006. Systematics of the tribe Stipeae using molecular data. Aliso 23:349-361 }}{{Treatment/Reference |id=johnson1945a |text=Johnson, B.L. 1945. Cytotaxonomic studies in Oryzopsis. Bot. Gaz. 107:1-32 }}{{Treatment/Reference |id=kam1974a |text=Kam, Y.K. and J. Maze. 1974. Studies on the relationships and evolution of supraspecific taxa utilizing developmental data: II. Relationships and evolution of Oryzopsis bymenoides, O. virescens, O. kingii, O. micrantka, and O. asperifolia. Bot. Gaz. 135:227-247 }}{{Treatment/Reference |id=tutin1980a |text=Tutin, T.G. 1980. Piptatherum Beauv. Pp. 246-247 in T.G. Tutin, V.H. Heywood, N.A. Burges, D.M. Moore, D.H. Valentine, S.M. Walters, and D.A. Webb (eds.). Flora Europaea, vol. 5. Cambridge University Press, Cambridge, England. 452 pp. }} }}<!-- --><!-- -->{{#Taxon: name=Oryzopsis |author=Mary E. Barkworth; |authority=Michx. |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Poaceae |illustrator=Annaliese Miller |illustration copyright=Utah State University |distribution=Wash.;Wis.;W.Va.;Colo.;Wyo.;N.H.;N.J.;N.Mex.;N.Y.;Pa.;R.I.;Va.;Conn.;Mass.;Maine;Vt.;Ill.;Ind.;Iowa;Idaho;Md.;Ohio;Utah;Minn.;Mich.;N.Dak.;S.Dak.;Mont.;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Labr.);N.S.;N.W.T.;Ont.;P.E.I.;Que.;Sask.;Yukon |reference=dore1980b;freitag1975b;hitchcock1951a;jacobs2006a;johnson1945a;kam1974a;tutin1980a |publication title= |publication year= |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24_230.xml |subfamily=Poaceae subfam. Pooideae |tribe=Poaceae tribe Stipeae |genus=Oryzopsis |anther quantity=3 |apex shape=mucronate |auricle presence=absent |awn course=straight |awn duration=deciduous |base architecture=twisted |base position=uppermost |blade-leaf distance=2mm;12mm |branch quantity=2 |callus length=blunt |callus quantity=0;1/5 |caryopse life cycle=falling |cauline leaf-blade size=reduced |cleistogene development=not developed |culm architecture=branching |culm orientation=spreading;erect |culm position=extravaginal;basal |culm some measurement=25cm;65cm |distal portion pubescence=pilose |floret quantity=1 |floret shape=terete;laterally compressed |glume architecture=6-10-veined |glume size=subequal |inflorescences panicle condition or size=contracted |leaf blade coloration=green |leaf blade orientation=recumbent;erect |leaf blade some measurement=30cm;90cm |leaf position=basal |lemma architecture=3-5(9)-veined |lemma pubescence=pubescent |lemma texture=coriaceous |lemma-awn junction architecture or shape=awned |lemma-awn junction life cycle=maturity |lemma-awn junction prominence=conspicuous |ligule architecture or pubescence or shape=ciliate |ligule length=longest |ligule shape=rounded |ligule texture=membranous |lobe some measurement=0.1mm;0.2mm |lodicule architecture=2-veined |lodicule fusion=free |lodicule quantity=2 |lodicule texture=membranous |margin arrangement=overlapping |margin shape=lobed |node pubescence=glabrous |ovary pubescence=glabrous |palea architecture=2-veined |palea prominence=concealed |palea prominence or shape=flat |palea texture=pubescence |prophyll prominence=not visible |rachilla length=not prolonged |sheath architecture=open |sheath pubescence=glabrous |spikelet some measurement=5mm;7.5mm |style quantity=1 |whole_organism architecture=not rhizomatous |whole_organism duration=perennial |whole_organism growth form=plant;cespitose |x chromosome quantity=12;11 }}<!-- -->[[Category:Treatment]][[Category:Poaceae tribe Stipeae]] Templates used on this page: Template:Poaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Reference (view source) Return to Oryzopsis.