Heterotheca camporum

(Greene) Shinners

Field & Lab. 19: 71. 1951.

Endemic
Basionym: Chrysopsis camporum Greene Pittonia 3: 88. 1896
Synonyms: Chrysopsis villosa var. camporum (Greene) Cronquist Heterotheca villosa var. camporum (Greene) Wunderlin
Treatment appears in FNA Volume 20. Treatment on page 255. Mentioned on page 231, 233, 249.

Perennials, 35–110 (–150) cm; taprooted, spreading by rhizomes. Stems 1–30 (–100), ascending to erect (sometimes reddish-brown, sometimes ± brittle), appressed-strigose, sparsely to moderately long-hirsute, eglandular or sparsely to moderately stipitate-glandular, more densely so distally; axillary fascicles absent. Leaves: proximal cauline subpetiolate to sessile, blades oblanceolate, 38–73 cm × 6–15 (–18) mm, bases cuneate, margins flat, sparsely serrate, strigoso-ciliate, with a few long cilia proximally, faces moderately long-strigose, eglandular or sparsely to moderately stipitate-glandular; distal sessile (usually spreading, sometimes perpendicular), blades usually narrowly to broadly oblanceolate, rarely obovate or ovate, little reduced distally (not stiff), margins sparsely serrate (not long-ciliate), faces moderately strigose, sparsely to moderately stipitate-glandular. Heads (1–) 5–24, usually in open to congested corymbiform arrays, sometimes borne singly, on long peduncular branches. Peduncles 5–35 mm, short-hispido-strigose, sometimes stipitate-glandular; bracts 1–3, proximal leaflike, becoming linear-lanceolate, less hairy and more stipitate-glandular distally, larger bracts subtending heads absent or very rare. Involucres cylindric to campanulo-hemispheric, 7–9 (–10.5) mm. Phyllaries in 4–5 series, outer and mid narrowly triangular, unequal, margins hyaline, fimbriate-ciliate apically, faces sparsely strigose, eglandular or sparsely to moderately stipitate-glandular. Ray-florets 16–29 (–38); laminae 10.5–17 (–21.5) × 1–2 (–2.6) mm. Disc-florets (23–) 32–66; corolla barely ampliate, 5–6.6 mm, glabrous, lobes 0.5–1 mm, glabrous or glabrate. Cypselae monomorphic, compressed obconic, 1.7–3.9 mm, ribs 7–10 (often brownish), faces moderately strigose; pappi off-white, outer of linear scales 0.2–1 mm, inner of bristles 5–7 mm, longest weakly clavate.

Distribution

V20-555-distribution-map.gif

Ala., Ark., Ill., Ind., Ky., Mich., Miss., Mo., N.C., N.J., Tenn., Va.

Discussion

Varieties 2 (2 in the flora).

Chance introductions (usually emphemeral) of Heterotheca camporum have occurred in Michigan, New Jersey, and likely other eastern states. Heterotheca camporum has well-developed serrations along the margins of its distal cauline leaves, which no other species has, although basal leaves in some species may have one or two serrations distally.

Selected References

None.

Key

1 Plants 35–70 cm; distal stems and peduncles eglandular or sparsely to moderately stipitate-glandular; distal leaves moderately to densely hispido-strigose, usually eglandular, rarely sparsely stipitate-glandular; prairies, sandy banks, limestone bluffs, ledges, along the Mississippi River Heterotheca camporum var. camporum
1 Plants 35–140 cm; distal stems and peduncles moderately to densely stipitate-glandular; distal leaves moderately hispido-strigose, sparsely to moderately stipitate-glandular; roadsides, disturbed sandy habitats, stream banks, glades Heterotheca camporum var. glandulissima

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

... more about "Heterotheca camporum"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +, open +  and congested +
indeterminate +  and determinate +
John C. Semple +
(Greene) Shinners +
cuneate +
Chrysopsis camporum +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
38 cm380 mm <br />0.38 m <br /> (73 cm730 mm <br />0.73 m <br />) +
ovate;obovate;oblanceolate;oblanceolate +
reduced +
6mm;15mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
rhizomatous +  and taprooted +
not 2-lipped +  and actinomorphic +
ampliate +
0.5 cm5 mm <br />0.005 m <br /> (0.66 cm6.6 mm <br />0.0066 m <br />) +
obconic +  and compressed +
fertile +  and bisexual +
Ala. +, Ark. +, Ill. +, Ind. +, Ky. +, Mich. +, Miss. +, Mo. +, N.C. +, N.J. +, Tenn. +  and Va. +
strigose +, stipitate-glandular +, moderately strigose +  and sparsely moderately stipitate-glandular +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
paniculiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
tan;rusty brown +
attenuate +  and clavate +
0.9 cm9 mm <br />0.009 m <br /> (1.05 cm10.5 mm <br />0.0105 m <br />) +
cylindric;campanulo-hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (2.15 cm21.5 mm <br />0.0215 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
10.5mm;17mm +
sessile +  and petiolate +
cauline +  and basal +
erect;spreading +
glabrate +  and glabrous +
lanceolate +, triangular +  and deltate +
fimbriate-ciliate +  and strigoso-ciliate +
stipitate-glandular +  and strigose +
2-carpellate +
in 3 +  and 4 series +
stipitate-glandular +  and short-hispido-strigose +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lanceolate +  and linear-lanceolate +
ovate-oblanceolate +
stipitate-glandular +  and hairy +
linear-lanceolate +
subpetiolate +  and sessile +
Field & Lab. +
bearing subulate enations +, hairy +  and bristly +
subulate;convex +
7 +  and 10 +
3 +  and 40 +
linear +  and linear-lanceolate or triangular +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
exalbuminous +
ascending +  and erect +
1 +  and 30 +
appendaged +  and truncate +
papillate +  and smooth +
Chrysopsis villosa var. camporum +  and Heterotheca villosa var. camporum +
Heterotheca camporum +
Heterotheca +
species +
110 cm1,100 mm <br />1.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
35 cm350 mm <br />0.35 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
tree +, shrub +  and subshrub +