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mature +
glabrous +
aggregated +
appressed-strigose +
epigynous +
dehiscent +
pink-purple to purple +
glabrous +
acute +
narrow +
small +
younger +
stipuliform +
cuneate +
coriaceous +
leafy +
absent +
symmetric +
caducous +
absent +
falcate +
membranous +
glandular-punctate +
glabrous +
woody +
simple +
lobed +
Mountain river hawthorn +
aggregated +
absent +
absent +
hard +
aggregated +
mature +
fascicles +
greenish +
red-purple +
determinate +
persistent +
glabrous +
obconic +
constricted +
2mm;6mm +
Present +
6-12-flowered +
axillary +
crassinucellate +
compound +
alternate +
deciduous +
horizontal +
absent +
prominent +
absent +
dominant +
sessile-glandular +
free +
earlier +
absent +
aggregated +
superposed +
monopodial +
corymbose +
domed +
absent +
epigynous +
pale paper brown +
post-mature +
absent +
glabrous +
slender +
1;250 +
exposed +
thin +
deep +
10 cm100 mm <br />0.1 m <br /> (?) +
mature +
glabrous +
bright +
suborbicular +
in J. Torrey and A. Gray, Fl. N. Amer. +
1840 +
grooved +
pitted +
plane +
not arillate +
2;1 +
persistent +
annual +
absent +
woody +
excavated +
eroded +
absent +
pitted +
plane +
shallow +
usually shorter +
spreading +
outer +
capitate +
pinnate +
deciduous +
free +
absent +
persistent +
distinct +
terminal +
3;5 +
elongate +
Crataegus rivularis +
Crataegus (sect. Douglasia) ser. Cerrones +
species +
compound +
straight +
recurved +
glossy +
slender +
fine +
pinnate +
young +
coarse +
acute +
developed +
absent +
inconspicuous +
minute +
erect +
absent +
thorny +
straight +
determinate +
branched +
proximal +
unarmed +
perennial +
incised +
narrower +