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2n chromosome quantity
44 +
Age architecture
continuous +
Anther coloration
yellow +
Appearance shape
cushionlike +
Appendage architecture
arillate +
Appendage pubescence or texture
corky +
Areole arrangement or shape
elliptic +
Areole atypical length
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Areole atypical quantity
6 (8) +
Areole atypical width
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Areole diameter
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Areole duration
deciduous +  and persistent +
Areole length
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Areole presence
absent +
Areole prominence
Conspicuous (Obscure) +
Areole quantity
16 +  and 28 +
Areole shape
oval +  and subcircular +
Areole width
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Author
Donald J. Pinkava +
Authority
Engelmann +
Basal portion coloration
red +
Bristle shape
Hairlike (?) +
Chain architecture
sessile +
Chain architecture or shape
symmetric +
Chain life cycle
proliferating +
Chain orientation
arising +
Cladode length or size
long +
Cladode shape
flattened +  and cylindric +
Common name
Western pricklypear +
Depression depth
shallow +
Depression quantity
1 (4) +
Depression size
large +
Distribution
Ariz. +, Ark. +, Colo. +, Kans. +, Mo. +, N.Mex. +, Okla. +, Tex. +, Utah +  and Mexico (Chihuahua) +
Elevation
100-2300 m +
Envelope derivation
funicular +
Envelope texture
osseous +
Epidermis arrangement
separating +
Epidermis condition
intact +
Filament coloration
pale-yellow +
Flower architecture
staminate +
Flower architecture or arrangement or growth form
solitary +
Flower architecture or shape
symmetric +
Flower arrangement
arranged +
Flower duration
diurnal +
Flower part life cycle
abscising +
Flower quantity
1 +
Flower reproduction
bisexual +
Flower shape
salverform +, cup-shaped +  and rotate +
Flower tube atypical some measurement
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Flower tube fusion
adnate +
Flower tube height or length or size
short +
Flower tube position
epigynous +
Flower tube some measurement
0.2 cm2 mm <br />0.002 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Fruit architecture
stipitate +
Fruit architecture or shape
burlike +  and spiny +
Fruit coloration
green;yellowish +
Fruit condition
drying +
Fruit condition or texture
dry +
Fruit course
straight +
Fruit dehiscence
indehiscent +
Fruit duration
persistent +, long +  and deciduous +
Fruit length
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Fruit life cycle
proliferating +
Fruit pubescence
glabrous +
Fruit relief
tuberculate +  and smooth +
Fruit shape
elongate-obovoid +
Fruit texture
fleshy +
Fruit width
1.5 cm15 mm <br />0.015 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
Girdle prominence
protruding +
Girdle some measurement
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Girdle width
broad +
Glochid coloration
Brown (Tan) +
Glochid life cycle
aging +
Glochid presence
absent +
Glochid some measurement
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Grain relief
foveolate +  and reticulate +
Habitat
Plains, chaparral, grassy woodlands, coniferous forests, sandy to loamy soils +
Hair density
dense +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Inflorescence derivation
true +
Inner tepal architecture or shape
emarginate-apiculate +
Inner tepal coloration
Yellow (?) +
Inner tepal shape
oblong +  and spatulate +
Inner tepal some measurement
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Leaf architecture
sessile +
Leaf arrangement
alternate +
Leaf duration
deciduous +
Leaf presence
absent +
Leaf prominence
vestigial +
Leaf shape
flattened +  and conic +
Leaf some measurement
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Leaf texture
succulent +
Long-shoot architecture or pubescence or relief
smooth +
Long-shoot relief
tuberculate +
Long-shoot shape
fluted;spheric;depressed-spheric or club-shaped +
Main axis development
determinate +
Main axis shape
terete +
Margin coloration
tinged color +
Nectar chamber architecture
open +  and simple +
Nectar chamber development
specialized +
Nectary architecture
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
Number of lower taxa
0 +
Outer tepal architecture or shape
sepal-like +
Outer tepal coloration
Green (?) +  and Yellow (?) +
Outer tepal shape
Bractlike (?) +
Ovary derivation
true +
Ovary position relational
surrounding +
Ovary prominence
sunken +
Perianth duration
persistent +  and deciduous +
Perianth life cycle
abscising +
Perianth position
epigynous +
Phenology
Flowering late spring (May–Jun). +
Pistil architecture
compound +
Pistil architecture or structure in adjective form
1-locular +
Placenta arrangement
parietal +
Placenta atypical quantity
14 (20) +
Placenta quantity
3;14 +
Pollen coloration
yellow +
Protuberance fusion
coalescent +
Protuberance shape
ridgelike +  and nipple--shaped +
Proximal style width
thickening +
Publication title
Boston J. Nat. Hist. +
Publication year
1850 +
Reference
None +
Rib atypical quantity
30 (40) +
Rib orientation
vertical +
Rib quantity
3;2;2;30 +
Rib short-shoot architecture or shape
barbed +
Rib short-shoot size
minute +
Root density
diffuse +
Root shape
tuberlike +
Rootstock shape
tuberlike +
Scar depth
deep +
Scar prominence or shape
flat +
Seed arrangement
adjacent +
Seed atypical quantity
0 (5) +
Seed coloration
tan +
Seed development
developing +
Seed diameter
0.4mm;12mm +
Seed length
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Seed presence
absent +
Seed pubescence
glabrous +
Seed quantity
1;400 +
Seed shape
warped;subcircular +
Seed some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Segment duration
persistent +
Segment fragility
detachable +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V4/V4 245.xml +
Special status
Illustrated +
Spine architecture
not sheathed +
Spine architecture or pubescence or relief
smooth +
Spine architecture or shape
barbed +
Spine atypical quantity
0 (1) +
Spine atypical some measurement
7.5 cm75 mm <br />0.075 m <br /> (17 cm170 mm <br />0.17 m <br />) +
Spine coloration
white +  and redbrown +
Spine course
straight +
Spine duration
deciduous +  and persistent +
Spine fragility
pliable +
Spine fragility or size
stout +
Spine length
longest +
Spine life cycle
aging +
Spine orientation
erect +  and spreading +
Spine presence
absent +
Spine prominence
conspicuous +
Spine pubescence
with hairlike bristles +  and setose +
Spine quantity
1 (?) +  and 4 (?) +
Spine relief or texture
roughened +
Spine shape
flattened +, terete +  and acicular +
Spine size
Slender (Stout) +
Spine some measurement
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Spine texture
hard +  and rigid +
Stamen quantity
50;1500 +
Stamen shape
decurrent +
Stem architecture
winged +  and unsegmented +
Stem relief
tuberculate +  and smooth +
Stem segment arrangement or shape
circular +
Stem segment atypical length
60 cm600 mm <br />0.6 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
Stem segment coloration
green +  and dark +
Stem segment fusion
detached +
Stem segment length
5 cm50 mm <br />0.05 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Stem segment pubescence
glaucous +
Stem segment reflectance
dull +
Stem segment relief
tuberculate +  and wrinkled +
Stem segment shape
Obovate (Circular) +
Stem segment texture
fleshy +
Stem segment width
3.5 cm35 mm <br />0.035 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
Stem shape
segmented +
Stem texture
woody +  and succulent +
Stigma lobe atypical quantity
14 (20) +
Stigma lobe coloration
cream +  and yellowish +
Stigma lobe quantity
1;3;14 +
Stipule presence
absent +
Style coloration
white +
Style quantity
1 +
Synonyms
Opuntia compressa var. macrorhiza +  and Opuntia mesacantha var. acrorhiza +
Taproot derivation
adventitious +
Taproot shape
tuberlike +
Taxon family
Cactaceae +
Taxon habitat
epipetric +  and epiphytic +
Taxon name
Opuntia macrorhiza +
Taxon parent
Opuntia +
Taxon rank
species +
Tepal quantity
5;50 +
Testa reflectance
dull +  and glossy +
Tip coloration
yellow +  and paler +
Trunk shape
segmented +
Tubercle fusion
distinct +
Tubercle presence
absent +
Tuft density
dense +
Unit quantity
single +
Vascular-bundle prominence
protruding +
Vascular-bundle size
enlarged +
Volume
Volume 4 +
Whole organism architecture
branched +
Whole organism architecture or arrangement or growth form
solitary +
Whole organism growth form
shrub +
Whole organism habitat
terrestrial;epiphytic or epipetric +
Whole organism orientation
erect +  and trailing +
Whole organism quantity
Many (?) +
Whole organism some measurement
7.5cm (16cm) +
Wing prominence or shape
flat +
Wool coloration
tan +
X chromosome quantity
11 +