Heterotheca subaxillaris subsp. subaxillaris

Illustrated
Synonyms: Chrysopsis scabra Elliott Diplopappus scaber Hooker Heterotheca chrysopsidis de Candolle Heterotheca lamarckii Cassini Heterotheca scabra (Pursh) de Candolle Inula scabra Pursh Stelmanis scabra Rafinesque
Treatment appears in FNA Volume 20. Treatment on page 235.

Outer and mid phyllaries with apical tuft of 6–28 coarse, scabro-strigose hairs, faces sparsely to densely stipitate-glandular. 2n = 18.


Phenology: Flowering (spring–)May–Dec.
Habitat: Sandy and gravelly soils, coastal dunes, disturbed ground, roadsides, vacant lots, fields, areas in pine and oak woods and scrub
Elevation: 0–100+ m

Distribution

V20-515-distribution-map.gif

Ala., Del., Fla., Ga., La., Md., Miss., N.J., N.C., S.C., Tex., Mexico

Discussion

Subspecies subaxillaris is found on the outer coastal plains along the Gulf and Atlantic coasts from northern Mexico to Delaware. They are rarely more than 1 m and can be procumbent on dunes. Atypical spring-blooming plants often lack the distinctive distal tuft of coarse hairs on the phyllaries. The number of hairs in the tuft decreases from as many as 28 in Texas and Louisiana to 10–15 in Florida to 6–16 from Georgia to New Jersey.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John C. Semple +
(Lamarck) Britton & Rusby +
not clasping +  and subclasping +
cordate +, cuneate +  and attenuate +
Inula subaxillaris +
compound +  and simple +
1 cm10 mm <br />0.01 m <br /> (9 cm90 mm <br />0.09 m <br />) +
ovate;lanceolate +
reduced +
2mm;20mm +
rugulose +  and muricate +
branched +  and corymbo-paniculiform +
ascending;spreading +
barbellulate +  and barbellate +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
rhizomatous +  and taprooted +
not 2-lipped +  and actinomorphic +
ampliate +
0.2 cm2 mm <br />0.002 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
fertile +  and bisexual +
Ala. +, Del. +, Fla. +, Ga. +, La. +, Md. +, Miss. +, N.J. +, N.C. +, S.C. +, Tex. +  and Mexico +
0–100+ m +
stipitate-glandular +
compressed +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy and gravelly soils, coastal dunes, disturbed ground, roadsides, vacant lots, fields, areas in pine and oak woods and scrub +
scabro-strigose +
paniculiform +
in corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
tan;rusty brown +
attenuate +  and clavate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hemispheric;campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
brown +  and black +
persisting +
withered +  and flowering +
cauline +, basal +  and mid +
erect;spreading +
lanceolate +, triangular +  and deltate +
strigoso-ciliate +  and long-ciliate +
entire +  and serrate +
stipitate-glandular +  and strigose +
undulate +  and flat +
2-carpellate +
tan to rust +
stipitate-glandular +  and hispido-strigose +
0.2 cm2 mm <br />0.002 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Flowering (spring–)May–Dec. +
lanceolate +
ovate-oblanceolate +
ovate +  and lanceolate +
glabrous +  and sparsely short-strigose +
Trans. New York Acad. Sci. +
bearing subulate enations +, hairy +  and bristly +
subulate;convex +
2 +  and 3 +
triangular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
3 +  and 40 +
linear +  and triangular +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
exalbuminous +
Illustrated +
1 +  and 4 +
appendaged +  and truncate +
papillate +  and smooth +
Chrysopsis scabra +, Diplopappus scaber +, Heterotheca chrysopsidis +, Heterotheca lamarckii +, Heterotheca scabra +, Inula scabra +  and Stelmanis scabra +
Heterotheca subaxillaris subsp. subaxillaris +
Heterotheca subaxillaris +
subspecies +
60 cm600 mm <br />0.6 m <br /> (200 cm2,000 mm <br />2 m <br />) +
biennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
tree +, shrub +  and subshrub +