Difference between revisions of "Crataegus nananixonii"

J. B. Phipps & O’Kennon

Sida 17: 569, fig. 1. 1997.

Common names: Nixon’s dwarf hawthorn
Endemic
Treatment appears in FNA Volume 9. Treatment on page 590. Mentioned on page 586.
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name=Crataegus nananixonii
 
name=Crataegus nananixonii
|author=
 
 
|authority=J. B. Phipps & O’Kennon
 
|authority=J. B. Phipps & O’Kennon
 
|rank=species
 
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|publication year=1997
 
|publication year=1997
 
|special status=Endemic
 
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V9/V9_1006.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_1006.xml
 
|subfamily=Rosaceae subfam. Amygdaloideae
 
|subfamily=Rosaceae subfam. Amygdaloideae
 
|tribe=Rosaceae tribe Gillenieae
 
|tribe=Rosaceae tribe Gillenieae

Latest revision as of 22:53, 5 November 2020

Shrubs, 10–15 dm. Stems intricately branched; twigs: new growth reddish green, pubescent, 1-year old gray to gray-brown, older gray; thorns on twigs straight to slightly recurved, 2-years old dark dull gray, fine, 1–3 cm. Leaves: petiole length 20–40% blade, pubescence not recorded, gland-dotted; blade rhombic-ovate, 1.5–3.5 cm, base broadly cuneate, lobes 0 or with sinuses very shallow, margins ± irregularly serrate, some teeth gland-tipped, especially proximally, veins 3 per side, apex acute, abaxial surface glabrous, veins sparsely pubescent, adaxial sparsely scabrous young, glabrescent. Inflorescences 3–5-flowered; branches pubescent; bracteole margins short-stipitate-glandular. Flowers 12–15 mm diam.; hypanthium glabrous; sepals lanceolate, 4–5 mm, margins glandular, abaxially glabrous; petals slightly clawed; stamens 10, anthers rose-purple; styles 3–5. Pomes coppery red, suborbicular, 10 mm diam., glabrous; sepal remnants present or not, on collar, patent-reflexed; pyrenes 3–5.


Phenology: Flowering Apr; fruiting Sep–Oct.
Habitat: Open sandy sites
Elevation: 200 m

Distribution

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Tex.

Discussion

Crataegus nananixonii is restricted to open sandy sites in Nacogdoches and nearby counties of eastern Texas. The species is a very dwarf and distinctive member of ser. Intricatae, similar to C. biltmoreana but with much smaller parts.

Selected References

None.

Lower Taxa

None.