Difference between revisions of "Opuntia humifusa"

(Rafinesque) Rafinesque

Med. Fl. 2: 247. 1830.

Common names: Eastern pricklypear
Basionym: Cactus humifusus Rafinesque
Treatment appears in FNA Volume 4. Treatment on page 130. Mentioned on page 122, 125, 127, 132.
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--><span class="statement" id="st-d0_s0" data-properties="shrub growth form or orientation;shrub count;shrub count;segment height;segment some measurement;segment shape;segment shape;segment shape;rootstock shape"><b>Shrubs,</b> forming clumps or often prostrate, usually only 1 or 2 stem segments tall, to 0.5 m (except in Florida where they may erect and reach to 2+ m with short trunk), flattened to obovoid, sometimes from tuberlike rootstocks.</span> <span class="statement" id="st-d0_s1" data-properties="stem segment architecture;stem segment coloration;stem segment coloration;stem segment coloration;stem segment coloration;stem segment relief;stem segment shape;stem segment shape;stem segment shape;stem segment shape;stem segment length;stem segment width;stem segment texture;stem segment relief;stem segment pubescence"><b>Stem </b>segments not disarticulating, dark or bright shiny green, wrinkling when stressed, circular to broadly oblong to obovate, 5–17.5 × 4–12 cm, fleshy, usually tuberculate, glabrous;</span> <span class="statement" id="st-d0_s2" data-properties="areole count;areole shape;areole shape;areole shape;areole diameter;areole prominence;areole prominence">areoles 4–6 per diagonal row across midstem segment, oval to circular, 2–4 mm diam., not raised, sometimes somewhat sunken;</span> <span class="statement" id="st-d0_s3" data-properties="wool coloration;wool coloration;wool coloration">wool tan to brown.</span> <span class="statement" id="st-d0_s4" data-properties=""><b>Spines </b>often absent or 1–2 (–3) per areole, spreading, whitish to brownish, terete, straight, and usually stout, 25–60 mm;</span> <span class="statement" id="st-d0_s5" data-properties="spine count;spine atypical count;spine count;spine orientation;spine coloration;spine coloration;spine coloration;spine shape;spine course;spine fragility or size;spine some measurement;spine count;spine orientation;spine count">occasionally also 1 deflexed spine present.</span> <span class="statement" id="st-d0_s6" data-properties="glochid coloration;glochid coloration;glochid coloration;glochid some measurement;tuft density;tuft shape"><b>Glochids </b>in dense crescent of adaxial edge of areole and in dense tuft overtopping crescent in age, yellow to redbrown, to 4 mm.</span> <span class="statement" id="st-d0_s7" data-properties="inner tepal coloration;inner tepal coloration;inner tepal coloration;inner tepal diameter"><b>Flowers:</b> inner tepals pale to bright-yellow throughout, 20–30 mm diam.;</span> <span class="statement" id="st-d0_s8" data-properties="filament coloration;filament coloration;filament coloration">filaments yellow to orange;</span> <span class="statement" id="st-d0_s9" data-properties="anther coloration;anther coloration;anther coloration">anthers pale-yellow to cream;</span> <span class="statement" id="st-d0_s10" data-properties="style coloration;stigma lobe coloration">style and stigma lobes white.</span> <span class="statement" id="st-d0_s11" data-properties="fruit coloration;fruit coloration;fruit coloration;fruit coloration;fruit shape;fruit length;fruit width;fruit texture;fruit shape"><b>Fruits </b>greenish, tardily becoming apricot to brownish red, elongate, 30–50 × 12–20 mm, fleshy, tapering at base;</span> <span class="statement" id="st-d0_s12" data-properties="pulp coloration;pulp taste;pulp coloration;pulp taste">pulp green and sour, becoming reddish and sweet under ideal conditions;</span> <span class="statement" id="st-d0_s13" data-properties="areole count">areoles 10–18.</span> <span class="statement" id="st-d0_s14" data-properties="seed coloration;seed diameter;seed width"><b>Seeds </b>tan, 3.5–4.5 mm diam., thickish;</span> <span class="statement" id="st-d0_s15" data-properties="girdle prominence">girdle protruding to 1 mm.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> forming clumps or often prostrate, usually only 1 or 2 stem segments tall, to 0.5 m (except in Florida where they may be erect and reach to 2+ m with short trunk), flattened to obovoid, sometimes from tuberlike rootstocks. <b>Stem</b> segments not disarticulating, dark or bright shiny green, wrinkling when stressed, circular to broadly oblong to obovate, 5–17.5 × 4–12 cm, fleshy, usually tuberculate, glabrous; areoles 4–6 per diagonal row across midstem segment, oval to circular, 2–4 mm diam., not raised, sometimes somewhat sunken; wool tan to brown. <b>Spines</b> often absent or 1–2(–3) per areole, spreading, whitish to brownish, terete, straight, and usually stout, 25–60 mm; occasionally also 1 deflexed spine present. <b>Glochids</b> in dense crescent of adaxial edge of areole and in dense tuft overtopping crescent in age, yellow to red-brown, to 4 mm. <b>Flowers</b>: inner tepals pale to bright yellow throughout, 20–30 mm diam.; filaments yellow to orange; anthers pale yellow to cream; style and stigma lobes white. <b>Fruits</b> greenish, tardily becoming apricot to brownish red, elongate, 30–50 × 12–20 mm, fleshy, tapering at base; pulp green and sour, becoming reddish and sweet under ideal conditions; areoles 10–18. <b>Seeds</b> tan, 3.5–4.5 mm diam., thickish; girdle protruding to 1 mm.</span><!--
  
 
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|publication year=1830
 
|publication year=1830
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V4/V4_242.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V4/V4_242.xml
 
|subfamily=Cactaceae subfam. Opuntioideae
 
|subfamily=Cactaceae subfam. Opuntioideae
 
|genus=Opuntia
 
|genus=Opuntia
 
|species=Opuntia humifusa
 
|species=Opuntia humifusa
|anther coloration=pale-yellow;cream
 
|areole count=10;18
 
|areole diameter=2mm;4mm
 
|areole prominence=sunken;not raised
 
|areole shape=oval;circular
 
|filament coloration=yellow;orange
 
|fruit coloration=apricot;brownish red
 
|fruit length=30mm;50mm
 
|fruit shape=tapering;elongate
 
|fruit texture=fleshy
 
|fruit width=12mm;20mm
 
|girdle prominence=protruding
 
|glochid coloration=yellow;redbrown
 
|glochid some measurement=0mm;4mm
 
|inner tepal coloration=pale;bright-yellow
 
|inner tepal diameter=20mm;30mm
 
|pulp coloration=reddish;green
 
|pulp taste=sweet;sour
 
|rootstock shape=tuberlike
 
|seed coloration=tan
 
|seed diameter=3.5mm;4.5mm
 
|seed width=thickish
 
|segment height=tall
 
|segment shape=flattened;obovoid
 
|segment some measurement=0m;0.5m
 
|shrub count=2;1
 
|shrub growth form or orientation=prostrate
 
|spine atypical count=2;3
 
|spine coloration=whitish;brownish
 
|spine count=present;1;1;2
 
|spine course=straight
 
|spine fragility or size=stout
 
|spine orientation=deflexed;spreading
 
|spine shape=terete
 
|spine some measurement=25mm;60mm
 
|stem segment architecture=not disarticulating
 
|stem segment coloration=green;shiny;bright;dark
 
|stem segment length=5cm;17.5cm
 
|stem segment pubescence=glabrous
 
|stem segment relief=tuberculate;wrinkling
 
|stem segment shape=circular;broadly oblong
 
|stem segment texture=fleshy
 
|stem segment width=4cm;12cm
 
|stigma lobe coloration=white
 
|style coloration=white
 
|tuft density=dense
 
|tuft shape=crescent
 
|wool coloration=tan;brown
 
 
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Revision as of 14:01, 27 July 2019

Shrubs, forming clumps or often prostrate, usually only 1 or 2 stem segments tall, to 0.5 m (except in Florida where they may be erect and reach to 2+ m with short trunk), flattened to obovoid, sometimes from tuberlike rootstocks. Stem segments not disarticulating, dark or bright shiny green, wrinkling when stressed, circular to broadly oblong to obovate, 5–17.5 × 4–12 cm, fleshy, usually tuberculate, glabrous; areoles 4–6 per diagonal row across midstem segment, oval to circular, 2–4 mm diam., not raised, sometimes somewhat sunken; wool tan to brown. Spines often absent or 1–2(–3) per areole, spreading, whitish to brownish, terete, straight, and usually stout, 25–60 mm; occasionally also 1 deflexed spine present. Glochids in dense crescent of adaxial edge of areole and in dense tuft overtopping crescent in age, yellow to red-brown, to 4 mm. Flowers: inner tepals pale to bright yellow throughout, 20–30 mm diam.; filaments yellow to orange; anthers pale yellow to cream; style and stigma lobes white. Fruits greenish, tardily becoming apricot to brownish red, elongate, 30–50 × 12–20 mm, fleshy, tapering at base; pulp green and sour, becoming reddish and sweet under ideal conditions; areoles 10–18. Seeds tan, 3.5–4.5 mm diam., thickish; girdle protruding to 1 mm.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Shrubs forming clumps, often prostrate, usually only 1 or 2 stem segments tall, to 0.5 m Opuntia humifusa var. humifusa
1 Shrubs or small trees, erect, to 2 m Opuntia humifusa var. ammophilia