familyRosaceae
subfamilyRosaceae subfam. Amygdaloideae
genusCrataegus
sectionCrataegus sect. Coccineae
speciesCrataegus collina
Crataegus collina var. lettermanii
Rhodora 10: 76. 1908.
Endemic
Basionym: Crataegus lettermanii Sargent Bot. Gaz. 31: 220. 1901 (as lettermani)
Synonyms: C. collina var. secta (Sargent) E. J. Palmer C. secta
Leaf-blades broadly elliptic, 5–7.5 cm, nearly full grown at anthesis, length/width = 1.3, chartaceous, lobes 1 or 2 per side, evident, max LII 20%, lobe apex obtuse, margins serrate, teeth 1 mm, apex subacute to obtuse, adaxial surface matte, pubescent young. Inflorescence branches pubescent. Flowers 14–18 mm diam.; stamens 5–15 (–20), anthers white or cream.
Phenology: Flowering Apr; fruiting Sep–Oct.
Habitat: Pastures, fencerows, scrub, open woodlands
Elevation: 10–500 m
Discussion
Variety lettermanii has leaves rather large for Crataegus collina; they are also relatively wide and have well-developed, obtuse lobes, making it like a larger var. hirtiflora.
Selected References
None.
Lower Taxa
None.
"thin" is not a number."short" is not a number."pubescent" is not a number."adnate" is not a number."dm" is not declared as a valid unit of measurement for this property.
... more about "Crataegus collina var. lettermanii"
scabrous-pubescent +
aggregated +
pubescent +
epigynous +
dehiscent +
subacute;obtuse +
flattened-scaly +
orangebrown +
exposed +
stipuliform +
tapering +
elliptic +
1.4-2.5 +
coriaceous +
leafy +
absent +
symmetric +
caducous +
absent +
falcate +
membranous +
appressed-pubescent +
woody +
simple +
lobed +
Mo. +
aggregated +
absent +
absent +
hard +
aggregated +
mature +
fascicles +
determinate +
pubescent +
persistent +
obconic +
constricted +
2mm;6mm +
5-10-flowered +
pubescent +
axillary +
crassinucellate +
absent +
compound +
alternate +
deciduous +
horizontal +
prominent +
absent +
evident +
dominant +
sessile +
serrate +
free +
earlier +
flowering +
short-stipitate-glandular +
absent +
aggregated +
superposed +
monopodial +
corymbose +
domed +
absent +
pubescent +
absent +
epigynous +
pale paper brown +
post-mature +
eglandular +
sessile-glandular +
absent +
1 cm10 mm <br />0.01 m <br /> (?) +
1;250 +
longitudinal +
exposed +
thin +
pruinose +
punctate +
glabrous +
orbicular +
Rhodora +
1908 +
grooved +
plane +
not arillate +
2;1 +
persistent +
much shorter +
glandular-serrate +
glabrous +
patent-reflexed +
triangular +
annual +
absent +
woody +
excavated +
eroded +
absent +
pitted +
plane +
shallow +
matte +
Endemic +
usually shorter +
5;15 +
spreading +
outer +
capitate +
pinnate +
deciduous +
free +
absent +
persistent +
distinct +
terminal +
elongate +
Crataegus collina var. lettermanii +
Crataegus collina +
variety +
compound +
dark gray +
straight +
stout +
recurved +
slender +
pinnate +
young +
1 cm10 mm <br />0.01 m <br /> (?) +
developed +
absent +
inconspicuous +
minute +
fibrous +
absent +
thorny +
determinate +
unarmed +
perennial +
incised +
narrower +