Crataegus collina var. lettermanii

(Sargent) Eggleston

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
Treatment appears in FNA Volume 9. Treatment on page 545. Mentioned on page 542, 543.

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.
68 +, 51 +  and 34 +
scabrous-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cream +  and white +
James B. Phipps +
(Sargent) Eggleston +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
tapering +
Crataegus lettermanii +
5 cm50 mm <br />0.05 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
5 cm50 mm <br />0.05 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
rhombic-elliptic +, obtrullate +, obovate +, elliptic +  and rhombic-obovate +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
appressed-pubescent +
adnate +  and distinct +
crowded +, scattered +  and alternate +
not +  and aggregated +
10–500 m +
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
yellow +  and red or purplish +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
gray +  and grayish brown +
older +, old +  and new +
Pastures, fencerows, scrub, open woodlands +
pubescent +  and glabrous +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
short-stipitate-glandular +
serrate +  and crenate +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
eglandular +  and unwinged +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
elliptic +  and circular +
0 (?) +  and 4 (?) +
free +  and distinct +
post-mature +
pubescent +
1 cm10 mm <br />0.01 m <br /> (?) +
Flowering Apr +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
ruddy +  and deep red +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
orbicular +
not arillate +
persistent +
free +  and distinct +
patent-reflexed +
triangular +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
C. collina var. secta +  and C. secta +
Crataegus collina var. lettermanii +
Crataegus collina +
variety +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
craspedodromous +  and gland-tipped +
1 cm10 mm <br />0.01 m <br /> (?) +
inconspicuous +
less erect +  and oblique +
1 +  and several +
determinate +
few +  and numerous +
not +  and pubescent +
5 +  and 7 +