Crataegus (sect. Coccineae) ser. Greggianae

J. B. Phipps

Monogr. N. Mex. Crataegus, 14. 1997.

Conservation concern
Treatment appears in FNA Volume 9. Treatment on page 550. Mentioned on page 527.

Shrubs or trees, 40–80 dm, usually main trunk dominant. Stems: trunk bark buff to pale gray-brown, fibrous, checked into longitudinal plates, freshly exposed bark orangebrown; branches spreading, ± straight toward tips; twigs: new growth densely appressed-pubescent, 1-year old gray, sometimes ± shiny, 2-years old dull gray; thorns on twigs numerous, ± recurved, 2-years old shiny black, ± slender, 2.5–5 cm. Leaves: petiole length 25–33% blade, densely pubescent, eglandular; blade broadly ovate or broadly elliptic to rhombic-elliptic, 2.5–4 (–5) cm, chartaceous, base ± truncate or cuneate, lobes obscure or 1–3 per side, sinuses very shallow, lobe apex acute, margins serrate, venation craspedodromous, veins 4–6 per side, apex acute to subacute, abaxial surface glabrate to tomentose, pubescent on veins, adaxial pubescent young. Inflorescences 3–8-flowered, convex panicles; branches pubescent; bracteoles caducous, linear, membranous, margins stipitate-glandular. Flowers 15 mm diam.; hypanthium tomentose; sepals narrowly triangular, much shorter than petals, margins glandular-serrate; stamens 10 [–20], anthers pink or rose [or white]; styles [3–] 5. Pomes brick-red to bright red, suborbicular, 7–11 mm diam., pubescent; flesh mealy; sepals sometimes eroded, spreading when retained, nonaccrescent; pyrenes [2–] 5.

Distribution

North America, Mexico, in Europe

Discussion

Species 2 (1 in the flora).

Series Greggianae is restricted to the northern Sierra Madre Oriental, Mexico, and Edwards Plateau, Texas; it is found in dry and mesic scrub. The strictly Mexican species in the series is Crataegus serratissima J. B. Phipps.

Members of ser. Greggianae are similar to ser. Molles but are smaller leaved, smaller flowered, have less prominent bracteoles, and are more xeromorphic.

Selected References

None.

pubescent +, glabrate +  and tomentose +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
rose +  and pink +
James B. Phipps +
J. B. Phipps +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +  and truncate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
broadly elliptic to rhombic-elliptic +  and ovate +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
adnate +  and distinct +
crowded +, scattered +  and alternate +
North America +, Mexico +  and in Europe +
not +  and aggregated +
15 cm150 mm <br />0.15 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 />) +
old +  and new +
appressed-pubescent +
dull +  and shiny +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
craspedodromous +
glandular-serrate +  and serrate +
stipitate-glandular +
serrate +  and crenate +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
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 +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
brick-red +  and bright red +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
suborbicular +
Monogr. N. Mex. Crataegus, +
not arillate +
persistent +
free +  and distinct +
triangular +
nonaccrescent +
1-50-flowered +  and few-leaved +
Conservation concern +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus (sect. Coccineae) ser. Greggianae +
Crataegus sect. Coccineae +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
determinate +
4 +  and 6 +
tree +  and shrub +