View source for Orcuttia

{{Treatment/ID
|accepted_name=Orcuttia
|accepted_authority=Vasey
|publications=
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Chloridoideae;Poaceae tribe Orcuttieae;Orcuttia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Chloridoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Orcuttieae]]</div><div class="higher-taxon"><small>genus</small>[[Orcuttia]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 290
}}<!--

--><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>annual;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism odor;whole_organism pubescence;whole_organism growth form;basal leaf length or size;basal leaf life cycle;basal leaf growth form or location">viscid-aromatic, pilose, sometimes sparsely so, producing long, juvenile, floating basal leaves.</span> <span class="statement" id="st-d0_s2" data-properties="culm some measurement;culm orientation;culm orientation;culm growth form or orientation;culm growth form or orientation;culm arrangement;culm architecture"><b>Culms </b>3-35 cm, erect, ascending, or decumbent, sometimes becoming prostrate, not breaking apart at the nodes, usually branching only at the lower nodes.</span> <span class="statement" id="st-d0_s3" data-properties="collar line prominence"><b>Leaves </b>without ligules, sometimes with a collar line visible at the junction of the sheath and blade, especially when dry;</span> <span class="statement" id="st-d0_s4" data-properties="blade prominence or shape;blade shape or vernation">blades flat or becoming involute in drying.</span> <span class="statement" id="st-d0_s5" data-properties="inflorescence position or structure subtype;inflorescence shape;inflorescence position"><b>Inflorescences </b>terminal, clavate to capitate spikes, exserted at maturity, spikelets distichously arranged;</span> <span class="statement" id="st-d0_s6" data-properties="spikelet arrangement">disarticulation tardy, above the glumes and between the florets.</span> <span class="statement" id="st-d0_s7" data-properties="spikelet shape;floret quantity"><b>Spikelets </b>laterally compressed, with 4-40 florets.</span> <span class="statement" id="st-d0_s8" data-properties="glume shape"><b>Glumes </b>irregularly 2-5-toothed;</span> <span class="statement" id="st-d0_s9" data-properties="lemma architecture or shape;lemma architecture;tooth prominence;tooth shape;tooth architecture;tooth quantity;tooth position;vein quantity;vein fragility;central vein fragility">lemmas deeply cleft and strongly 5-veined, veins terminating in prominent mucronate or awn-tipped teeth 1/3 - 1/2 or more as long as the lemma bodies, each tooth with an additional weaker vein on either side of a strong central vein, these extending about halfway to the base of the lemma;</span> <span class="statement" id="st-d0_s10" data-properties="palea development;palea architecture">paleas well-developed, 2-veined;</span> <span class="statement" id="st-d0_s11" data-properties="lodicule presence">lodicules absent;</span> <span class="statement" id="st-d0_s12" data-properties="anther quantity;anther coloration;anther coloration;filament length or size;filament size;filament architecture or shape">anthers 3, white or pinkish, exserted on long, slender, ribbonlike filaments at anthesis;</span> <span class="statement" id="st-d0_s13" data-properties="style quantity;style position;style shape;style shape;style structure in adjective form;style length">styles 2, apical, elongate, filiform, stigmatic for 1/3 – 1/2 of their length;</span> <span class="statement" id="st-d0_s14" data-properties="stigmatic hair height or length or size;stigmatic hair count or density">stigmatic hairs short, often sparse.</span> <span class="statement" id="st-d0_s15" data-properties="caryopsis shape;caryopsis shape"><b>Caryopses </b>slightly compressed laterally, oblong to elliptic;</span> <span class="statement" id="st-d0_s16" data-properties="caryopsis variability">embryos 3/4 as long as to equaling the caryopses;</span> <span class="statement" id="st-d0_s17" data-properties="embryo quantity;embryo presence;x chromosome quantity">epiblast absent, x = 10, probably.</span><!--

-->{{Treatment/Body
|distribution=Calif.
|discussion=<p>Orcuttia is a genus of five species, all of which are restricted to vernal pools and similar habitats in California and northern Baja California, Mexico.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Lemma teeth unequal, the central tooth the longest.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Lemmas 6-7 mm long, the teeth terminating in awns at least 1 mm long; caryopses 2.3-2.5 mm long
|[[Orcuttia viscida|Orcuttia viscida]]
|-id=key-0-2
|2
|Lemmas 4-5 mm long, the teeth sharp-pointed or with awns to 0.5 mm long; caryopses 1.3-1.8 mm long.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Plants sparingly hairy; culms usually prostrate; spikes clavate
|[[Orcuttia californica|Orcuttia californica]]
|-id=key-0-3
|3
|Plants conspicuously hairy, grayish; culms erect or decumbent; spikes somewhat capitate
|[[Orcuttia inaequalis|Orcuttia inaequalis]]
|-id=key-0-1
|1
|Lemma teeth essentially equal in length.
|[[#key-0-2| > 2]]
|-id=key-0-4
|4
|Culms usually prostrate; caryopses 1.5-1.8 mm long
|[[Orcuttia californica|Orcuttia californica]]
|-id=key-0-4
|4
|Culms erect, ascending, or decumbent; caryopses 2-3 mm long.
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Culms 1-2 mm thick, branching only at the lower nodes; spikes congested, crowded towards the top; leaf blades 3-5 mm wide
|[[Orcuttia pilosa|Orcuttia pilosa]]
|-id=key-0-5
|5
|Culms 0.5-1 mm thick, often branching from the upper nodes; spikes not congested, even towards the top; leaf blades 1.5-2 mm wide
|[[Orcuttia tenuis|Orcuttia tenuis]]
|}
</div></div><!--

-->{{#Taxon:
name=Orcuttia
|author=John R. Reeder;
|authority=Vasey
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Poaceae
|distribution=Calif.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25_941.xml
|subfamily=Poaceae subfam. Chloridoideae
|tribe=Poaceae tribe Orcuttieae
|genus=Orcuttia
|anther coloration=pinkish;white
|anther quantity=3
|basal leaf growth form or location=floating
|basal leaf length or size=long
|basal leaf life cycle=juvenile
|blade prominence or shape=flat
|blade shape or vernation=involute
|caryopsis shape=oblong;elliptic
|caryopsis variability=equaling
|central vein fragility=strong
|collar line prominence=visible
|culm architecture=branching
|culm arrangement=not apart
|culm growth form or orientation=prostrate;decumbent
|culm orientation=ascending;erect
|culm some measurement=3cm;35cm
|embryo presence=absent
|embryo quantity=3/4
|filament architecture or shape=ribbonlike
|filament length or size=long
|filament size=slender
|floret quantity=4;40
|glume shape=2-5-toothed
|inflorescence position=exserted
|inflorescence position or structure subtype=terminal
|inflorescence shape=clavate;capitate
|lemma architecture=5-veined
|lemma architecture or shape=cleft
|lodicule presence=absent
|palea architecture=2-veined
|palea development=well-developed
|spikelet arrangement=arranged
|spikelet shape=compressed
|stigmatic hair count or density=sparse
|stigmatic hair height or length or size=short
|style length=1/3;1/2
|style position=apical
|style quantity=2
|style shape=filiform;elongate
|style structure in adjective form=stigmatic
|tooth architecture=awn-tipped
|tooth position=halfway
|tooth prominence=prominent
|tooth quantity=1/3;1/2
|tooth shape=mucronate
|vein fragility=weaker
|vein quantity=additional
|whole_organism duration=annual
|whole_organism growth form=plant
|whole_organism odor=viscid-aromatic
|whole_organism pubescence=pilose
|x chromosome quantity=10
}}<!--

-->[[Category:Treatment]][[Category:Poaceae tribe Orcuttieae]]