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<document id="4E93BA5EAEDF5887EBE67CF0EB040EAF" ENCODING="UTF8" ID-DOI="http://dx.doi.org/10.2307/2399983" ID-GBIF-Dataset="a839d8c3-a899-4278-86d2-667a5768008d" ID-HNS-Pub="ant acacia 2399983" ModsDocAuthor="David S. Seigler &amp; John E. Ebinger" ModsDocDate="1995" ModsDocID="ant acacia 2399983" ModsDocOrigin="http://www.jstor.org/stable/2399983" ModsDocTitle="Taxonomic Revision of the Ant-Acacias (Fabaceae, Mimosoideae, Acacia, Series Gummiferae) of the New World" checkinTime="1401218156963" checkinUser="jeremy" docAuthor="David S. Seigler &amp; John E. Ebinger" docDate="1995" docId="16612AAEA710275CA1955E0E1266269A" docLanguage="en" docName="ant acacia 2399983.xml" docOrigin="Annals of the Missouri Botanical Garden 82" docSource="http://www.jstor.org/stable/2399983" docTitle="Acacia janzenii Ebinger &amp; Seigler" docType="treatment" docVersion="11" lastPageNumber="131" masterDocId="15E8F6A477C9EC32F7AF930C217D7BBC" masterDocTitle="Taxonomic Revision of the Ant-Acacias (Fabaceae, Mimosoideae, Acacia, Series Gummiferae) of the New World" masterLastPageNumber="138" masterPageNumber="117" pageNumber="130" updateTime="1696286264499" updateUser="admin">
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<mods:title id="60DD4B5A2CEBBB1192AF004EED9134A9">Taxonomic Revision of the Ant-Acacias (Fabaceae, Mimosoideae, Acacia, Series Gummiferae) of the New World</mods:title>
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<mods:namePart id="E9556036D9D133E9FDF8C1BCBF35249F">David S. Seigler</mods:namePart>
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<mods:namePart id="8D24668318EDC316DC8D0871EC7090B1">John E. Ebinger</mods:namePart>
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<mods:title id="14AAED7DEC7BABCEAB032347E22D26F7">Annals of the Missouri Botanical Garden</mods:title>
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<mods:date id="3311F0F4F017AAFCAB9849825541BE04">1995</mods:date>
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<treatment id="16612AAEA710275CA1955E0E1266269A" ID-DOI="http://doi.org/10.5281/zenodo.6280879" ID-GBIF-Taxon="100059482" ID-Zenodo-Dep="6280879" LSID="urn:lsid:plazi:treatment:16612AAEA710275CA1955E0E1266269A" httpUri="http://treatment.plazi.org/id/16612AAEA710275CA1955E0E1266269A" lastPageId="14" lastPageNumber="131" pageId="13" pageNumber="130">
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<materialsCitation id="A9517A747F7D300A389DA68F7D7B1A2A" ID-GBIF-Occurrence="1058479836" collectingDate="1966-06-17" collectionCode="MO" collectorName="D. H. Janzen" country="Mexico" location="9.8 mi. W of Lazaro Cardenas on hwy. 180" pageId="13" pageNumber="130" specimenCode="515" specimenCount="1" stateProvince="Tabasco" typeStatus="holotype">
9.
<treatmentCitation id="281F0E64D7D423F31E68EB5845B5F68A" ID-CoL="8PFQ" author="Ebinger &amp; Seigler" authority="Ebinger &amp; Seigler" authorityName="Ebinger &amp; Seigler" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" page="245" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="janzenii" treatmentTaxon="Acacia janzenii" volume="32" year="1987">
<taxonomicName id="80A95860B0FBBF83E14BF323AA4BDF87" ID-CoL="8PFQ" authority="Ebinger &amp; Seigler" authorityName="Ebinger &amp; Seigler" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="janzenii">Acacia janzenii Ebinger &amp; Seigler</taxonomicName>
,
<bibCitation id="EAD75384B356BC26F2D8CF5CDC76B702" author="Ebinger &amp; Seigler" journal="Southw. Naturalist" page="245" volume="32" year="1987">Southw. Naturalist. 32: 245. 1987</bibCitation>
</treatmentCitation>
. type:
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.
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:
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. W of
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on hwy. 180
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,
<collectorName id="7D5651F00214213693FF88A6CB16A840" pageId="13" pageNumber="130">D. H. Janzen</collectorName>
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(
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,
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,
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<collectionCode id="0C9DEBA3326E915AEEC819DB9D96EC5E" collectionName="MICH" pageId="13" pageNumber="130">MICH</collectionCode>
,
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<collectionCode id="C21EE30E9F2D57C96C400A4AAE7685B5" pageId="13" pageNumber="130">MO</collectionCode>
,
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<collectionCode id="CED4690B7D0504EE9F49BBEBAB7288F3" pageId="13" pageNumber="130">UC</collectionCode>
,
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<collectionCode id="0A37C4AD2B9D6D67E1AEC1926B874975" pageId="13" pageNumber="130">US</collectionCode>
)
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.
</paragraph>
</subSubSection>
<subSubSection id="E70D8D1F0900AEF27A3834BEDB962047" pageId="13" pageNumber="130" type="description">
<paragraph id="995977E6978BDF72A5636CB229C1779F" pageId="13" pageNumber="130" type="mainText">
Tree to
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tall, young twigs dark reddish brown, lightly puberulent. Stipular spines dark brown to black, smooth, terete, densely pubescent with straight, yellowish hairs to
<quantity id="E6EEE172FA1BB02B229AFAA9D8136584" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="13" pageNumber="130" unit="mm" value="0.5">0.5 mm</quantity>
long, asymmetrical, U-shaped with an angle of 30-70°, usually curved around the stem, 30-60 (rarely 80) mm long,
<quantity id="975C4AA0F0B640F63523DE5ABEB015B6" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="9.0" metricValueMin="6.0" pageId="13" pageNumber="130" unit="mm" value="7.5" valueMax="9.0" valueMin="6.0">6-9 mm</quantity>
thick near the base. Leaves
<quantity id="AA2F99246103405310FD6B930405F2A1" metricMagnitude="-1" metricUnit="m" metricValue="2.6" metricValueMax="3.7" metricValueMin="1.5" pageId="13" pageNumber="130" unit="mm" value="260.0" valueMax="370.0" valueMin="150.0">150-370 mm</quantity>
long; pinnae 30-60 pairs per leaf,
<quantity id="227B566D0F5C8E5A9556FEE53583807B" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="9.0" metricValueMin="6.0" pageId="13" pageNumber="130" unit="mm" value="7.5" valueMax="9.0" valueMin="6.0">6-9 mm</quantity>
between pinna pairs; rachis grooved, densely pubescent with yellowish hairs, a columnar to narrowly volcano-shaped gland located at the node of each pinna pair, its apex
<quantity id="D47E1CD2D68686B4A03AB6D1E4F16768" metricMagnitude="-4" metricUnit="m" metricValue="6.0" metricValueMax="7.0" metricValueMin="5.0" pageId="13" pageNumber="130" unit="mm" value="0.6" valueMax="0.7" valueMin="0.5">0.5-0.7 mm</quantity>
across; petiole densely pubescent,
<quantity id="7E61F37AA12EEC0B179A420B0CCD5CEC" metricMagnitude="-3" metricUnit="m" metricValue="6.5" metricValueMax="8.0" metricValueMin="5.0" pageId="13" pageNumber="130" unit="mm" value="6.5" valueMax="8.0" valueMin="5.0">5-8 mm</quantity>
long. Petiolar glands absent. Leaflets 40-70 pairs per pinna, glabrous, linear,
<quantity id="C0BDC040EC6DD4B078A00E368C3F810A" metricMagnitude="-3" metricUnit="m" metricValue="4.25" metricValueMax="5.5" metricValueMin="3.0" pageId="13" pageNumber="130" unit="mm" value="4.25" valueMax="5.5" valueMin="3.0">3-5.5 mm</quantity>
long,
<quantity id="9402348840674D792A59DC15C7A38417" metricMagnitude="-4" metricUnit="m" metricValue="7.5" metricValueMax="9.0" metricValueMin="6.0" pageId="13" pageNumber="130" unit="mm" value="0.75" valueMax="0.9" valueMin="0.6">0.6-0.9 mm</quantity>
wide, lateral veins not obvious, only one vein from the base, apex acute, margins ciliate. Inflorescence a densely flowered globose head
<quantity id="17A9DA094C01A7C810B7FE2DBAA02A43" metricMagnitude="-3" metricUnit="m" metricValue="5.0" metricValueMax="6.0" metricValueMin="4.0" pageId="13" pageNumber="130" unit="mm" value="5.0" valueMax="6.0" valueMin="4.0">4-6 mm</quantity>
across, in clusters of
<quantity id="D83C248890A1A7D61CE2C6DC08DD01D7" metricMagnitude="-1" metricUnit="m" metricValue="7.366" metricValueMax="10.668" metricValueMin="4.064" pageId="13" pageNumber="130" unit="in" value="29.0" valueMax="42.0" valueMin="16.0">16-42 in</quantity>
the axil of slightly reduced leaves on normal branches, also located on fertile branchlets to
<quantity id="E935AD8CCB090823D7DDEAE7DA436122" metricMagnitude="-1" metricUnit="m" metricValue="2.5" pageId="13" pageNumber="130" unit="mm" value="250.0">250 mm</quantity>
long with 16-42 inflorescences in each of 6-12 fascicles that may not be subtended by leaves; peduncles glabrous to lightly puberulent,
<quantity id="6FAEFF00864A07232484DD748FD40120" metricMagnitude="-2" metricUnit="m" metricValue="1.15" metricValueMax="1.6" metricValueMin="0.7" pageId="13" pageNumber="130" unit="mm" value="11.5" valueMax="16.0" valueMin="7.0">7-16 mm</quantity>
long,
<quantity id="7AE591D085BFF41DB5DB6A829E16C9D1" metricMagnitude="-4" metricUnit="m" metricValue="5.0" metricValueMax="7.0" metricValueMin="3.0" pageId="13" pageNumber="130" unit="mm" value="0.5" valueMax="0.7" valueMin="0.3">0.3-0.7 mm</quantity>
thick, the same thickness throughout; involucre located near the middle of the peduncle, usually 4-lobed. Floral bracts peltate, apex circular, stalk
<quantity id="4795E575F325F03BF6AD14D01A16A548" metricMagnitude="-4" metricUnit="m" metricValue="5.5" metricValueMax="7.0" metricValueMin="4.0" pageId="13" pageNumber="130" unit="mm" value="0.55" valueMax="0.7" valueMin="0.4">0.4-0.7 mm</quantity>
long. Flowers sessile, calyx 5-lobed, glabrous,
<quantity id="4B25D5767DCA58D05F86FC36C5F96E66" metricMagnitude="-4" metricUnit="m" metricValue="8.5" metricValueMax="11.0" metricValueMin="6.0" pageId="13" pageNumber="130" unit="mm" value="0.85" valueMax="1.1" valueMin="0.6">0.6-1.1 mm</quantity>
long; corolla 5-lobed, glabrous,
<quantity id="A3A591DAD7C18FD677FC5175AA265052" metricMagnitude="-3" metricUnit="m" metricValue="1.65" metricValueMax="2.1" metricValueMin="1.2" pageId="13" pageNumber="130" unit="mm" value="1.65" valueMax="2.1" valueMin="1.2">1.2-2.1 mm</quantity>
long, about twice as long as the calyx. Legumes not seen, but probably very similar to those of
<taxonomicName id="C9A5DF9A3E3D179A00519C7B87FE2BA4" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="cookii">Acacia cookii</taxonomicName>
. Flowering May-July.
</paragraph>
</subSubSection>
<subSubSection id="A0E085F5F9F1369D00625A1AB332D639" pageId="13" pageNumber="130" type="distribution">
<paragraph id="44B30DC6048C98ACB8F0B6361E9F4ACC" pageId="13" pageNumber="130" type="mainText">
Distribution. Disturbed habitats, roadsides, pastures, and moist disturbed forests, to
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elevation, in Chiapas, Tabasco, and Veracruz, Mexico.
</paragraph>
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<subSubSection id="8B94CED5EE896A9272E7F0E2FBFAC864" pageId="13" pageNumber="130" type="materials_examined">
<paragraph id="F596BB065294931F7259D06279B0AB0B" pageId="13" pageNumber="130" type="mainText">
<materialsCitation id="CEF9DCC81DCEAB617EF6DE1F6C0C91B0" ID-GBIF-Occurrence="1058479824" collectionCode="MEX" collectorName="Breedlove" country="Mexico" elevation="300 m" location="Ixtacomitan" pageId="13" pageNumber="130" specimenCode="35053" specimenCount="1" stateProvince="Chiapas">
Representative specimens.
<collectingCountry id="01273ED395E61A9B2DC110C5D50F9ADD" name="Mexico" pageId="13" pageNumber="130">MEXICO</collectingCountry>
.
<collectingRegion id="C11822D8FA7D8BFFE758388F377D70EB" pageId="13" pageNumber="130">Chiapas</collectingRegion>
: stream bank, lower montane rainforest ridge above
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,
<quantity id="C556676AFF57301ED73E548560679F54" metricMagnitude="2" metricUnit="m" metricValue="3.0" pageId="13" pageNumber="130" unit="m" value="300.0">
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,
<collectorName id="D8E5414CB4B813F713C46E83B56F6CD9" pageId="13" pageNumber="130">Breedlove</collectorName>
<specimenCode id="10984C89CD36DB8EEFD13949DFFD84A5" pageId="13" pageNumber="130">35053</specimenCode>
(
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,
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<materialsCitation id="55B1695F7E90710835E2B64DD699D720" ID-GBIF-Occurrence="1058479863" collectionCode="MICH" collectorName="Breedlove" country="Mexico" elevation="300 m" location="Ixtacomitan" pageId="13" pageNumber="130" specimenCount="1" stateProvince="Chiapas">
<collectionCode id="DF7DFC33E63EB5E3D5198201AD169AC7" collectionName="MICH" pageId="13" pageNumber="130">MICH</collectionCode>
,
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<collectionCode id="EBC2BD0723AE1855345C93A233DC90AA" pageId="13" pageNumber="130">MO</collectionCode>
)
</materialsCitation>
.
<materialsCitation id="5C93961CADD9922C5B5CA332E2290B54" ID-GBIF-Occurrence="1058479857" collectionCode="MEX" collectorName="Janzen" country="Mexico" location="9.8 mi. W of Cardenas on hwy. 180" pageId="13" pageNumber="130" specimenCode="515" specimenCount="1" stateProvince="Tabasco">
<collectingRegion id="EE99A623EE2AA8AE420E58EB6C762229" pageId="13" pageNumber="130">Tabasco</collectingRegion>
:
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. W of Cardenas on hwy. 180
</location>
,
<collectorName id="B3B42613015B19DB11EF5CC339ECDC0F" pageId="13" pageNumber="130">Janzen</collectorName>
<specimenCode id="9B24716F2BB637B1FF274DC40E813259" pageId="13" pageNumber="130">515</specimenCode>
(
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)
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.
<materialsCitation id="7A6F7D98653680D3AD39677817BDABB4" ID-GBIF-Occurrence="1058479839" collectionCode="F" collectorName="Nevling &amp; Gomez-Pompa" country="Mexico" elevation="250 m" location="Las Cruces" pageId="13" pageNumber="130" specimenCode="1555" specimenCount="1" stateProvince="Veracruz">
<collectingRegion id="23FBC39E763919206C837FD2326E2A3A" pageId="13" pageNumber="130">Veracruz</collectingRegion>
:
<location id="1F188839F661E254D3D3F016F2AF9C12" LSID="urn:lsid:plazi:treatment:16612AAEA710275CA1955E0E1266269A:1F188839F661E254D3D3F016F2AF9C12" country="Mexico" name="Las Cruces" pageId="13" pageNumber="130" stateProvince="Veracruz">Las Cruces</location>
,
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<elevation id="54C311683742252CB3B1E182431E4D31" metricMagnitude="2" metricUnit="m" metricValue="2.5" pageId="13" pageNumber="130" unit="m" value="250.0">250 m</elevation>
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,
<collectorName id="294C7DE072FC59C1DD7E8884116028AB" pageId="13" pageNumber="130">
Nevling &amp;
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</collectorName>
<specimenCode id="6DD2362FC10EC806B3779409122C897C" pageId="13" pageNumber="130">1555</specimenCode>
(
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.
</paragraph>
</subSubSection>
<subSubSection id="0FBAEB9F5A791C3E6423A657FE0B7748" lastPageId="14" lastPageNumber="131" pageId="13" pageNumber="130" type="discussion">
<paragraph id="5E55F42A3602512136FE39A18EB21815" pageId="13" pageNumber="130" type="mainText">
<taxonomicName id="468EC0364DB057411E85CB35CE772DD3" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="janzenii">Acacia janzenii</taxonomicName>
is easily distinguished from all other ant-acacias by its asymmetrical stipular spines, which usually curve around the stem and are covered with straight, yellowish hairs to
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long. The only other species that commonly has asymmetrical thorns is
<taxonomicName id="1108324843E27B9C93BA9738DE16BE28" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="cookii">A. cookii</taxonomicName>
. These two closely related species differ in the petiolar and rachis glands, the type of pubescence on the spines, the leaflet length and width, and the flowering branchlets (see discussion under
<taxonomicName id="765FCFDFB75350119F55177D56D67059" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="cookii">A. cookii</taxonomicName>
).
</paragraph>
<paragraph id="58D571ED857B9F621339866316AAAA6B" lastPageId="14" lastPageNumber="131" pageId="13" pageNumber="130" type="mainText">
<bibRefCitation id="529C5922697900D8BD59D7579A6CD364" author="Janzen, D. H." journalOrPublisher="Smithsonian Contr. Bot" pageId="13" pageNumber="130" pagination="1 - 131" part="13" refId="ref22088" refString="-. 1974. Swollen-thorn acacias of Central America. Smithsonian Contr. Bot. 13: 1 - 131." title="Swollen-thorn acacias of Central America" type="journal article" year="1974">Janzen (1974)</bibRefCitation>
considered this taxon a part of
<taxonomicName id="932A463C92C1EACF7C865CF7F2C45831" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="cookii">Acacia cookii</taxonomicName>
. However, he noted that specimens from Tabasco and Chiapas, Mexico (herein referred to
<taxonomicName id="AE9CD157AB5BADDD291B8F7C9A33AFDC" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="janzenii">A. janzenii</taxonomicName>
) differ from typical
<taxonomicName id="0241E7410DDDE380B03B85212DC4FE7E" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="13" pageNumber="130" phylum="Tracheophyta" rank="species" species="cookii">A. cookii</taxonomicName>
. In particular, he noted that progressing from north (Mexico) to south (Belize, Guatemala, Honduras),
<pageBreakToken id="88B30F757CDFE6DDE3025CD50F1A5D3F" pageId="14" pageNumber="131" start="start">there</pageBreakToken>
is a change in spine length, a shortening of the fertile branchlets, an increase in the number of inflorescences per axil, an increase in the number of Beltian bodies per leaf, and a higher percentage of plants occupied by ants. Although he suggested that the extremes are clinally connected, our principal component analysis (
<collectionCode id="4AD107B12874D180E057E55AE535F5C0" pageId="14" pageNumber="131">PCA</collectionCode>
) suggests that these two species are specifically distinct. No intermediate plants were found, and the characters used for separation (petiolar and rachis glands, spine size, pubescence, leaflet size, fertile branchlets) are as significant as those characters used to distinguish other taxa of ant-acacias.
</paragraph>
<paragraph id="E1F2B36A506C1BEC2F2530EFA7266576" pageId="14" pageNumber="131" type="mainText">
Originally,
<taxonomicName id="34EED27FC68E8C57C75A09031C64ADA6" class="Magnoliopsida" family="Fabaceae" genus="Acacia" kingdom="Plantae" order="Fabales" pageId="14" pageNumber="131" phylum="Tracheophyta" rank="species" species="janzenii">Acacia janzenii</taxonomicName>
probably was a species of disturbed sites in open forests, particularly landslide scars and stream banks. Most recent collections seen are from roadsides and pastures.
</paragraph>
<paragraph id="151140308E420AAA55C71210EC156A63" pageId="14" pageNumber="131" type="mainText">
Beltian body production in this species is relatively low; usually less than 1/4 of the leaflets contain these bodies. Also, these bodies are usually less than
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long. None of the specimens tested positive for cyanide production.
</paragraph>
</subSubSection>
</treatment>
</document>
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