Crataegus (sect. Coccineae) ser. Madrenses

J. B. Phipps

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

Treatment appears in FNA Volume 9. Treatment on page 549. Mentioned on page 525, 526, 527.

Shrubs or trees, 40–80 dm, main trunk dominant. Stems: trunk bark not recorded; twigs: new growth pubescent at least initially, 1-year old brown, older dull gray; thorns on twigs numerous, straight to slightly recurved, 2-years old dark gray, ± shiny, ± slender, 2.5–5 cm. Leaves: petiole length 10–25% blade, pubescent, glandularity not recorded; blade broadly elliptic or elliptic-rhombic, rarely narrowly oblanceolate, 3–4 cm, subcoriaceous, base cuneate, lobes 0 or sinuses shallow, lobe apex acute, margins serrate except proximally, venation craspedodromous, veins 5 or 6 per side, apex acute to obtuse, abaxial surface glabrate except on veins, adaxial appressed-pilose, usually persisting. Inflorescences 6–15-flowered; branches canescent; bracteoles caducous, linear, membranous, margins stipitate-glandular. Flowers 15–17 mm diam.; hypanthium tomentose especially proximally; sepals narrowly triangular, 2/3 petal length, margins glandular-serrate to glandular-pectinate; stamens 10–20, anthers pink; styles 3–5. Pomes bright red, suborbicular, 8–10 (–20) mm diam., pubescent; flesh not recorded; sepals patent-reflexed; pyrenes 3.

Distribution

North America, Mexico, in Europe

Discussion

Species 2 (1 in the flora).

The two species of ser. Madrenses occur in northeastern Mexico. Crataegus tracyi extends to west-central Texas; C. aurescens J. B. Phipps is endemic to northeastern Mexico. Species of ser. Madrenses resemble those of ser. Crus-galli but have more styles and pyrenes (3–5) than is usual in the latter series, as well as strongly glandular-serrate to glandular-laciniate sepal margins.

Selected References

None.

Lower Taxa

0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
James B. Phipps +
J. B. Phipps +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
oblanceolate +, elliptic-rhombic +  and elliptic +
3 cm30 mm <br />0.03 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 +
1.5 cm15 mm <br />0.015 m <br /> (1.7 cm17 mm <br />0.017 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 brown +
older +, old +  and new +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
glandular-serrate +  and glandular-pectinate +
stipitate-glandular +
6 +  and 5 +
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 +
bright red +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
suborbicular +
Monogr. N. Mex. Crataegus, +
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 +
Crataegus (sect. Coccineae) ser. Madrenses +
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 +
craspedodromous +
1 +  and 8 +
tree +  and shrub +