Heterotheca stenophylla var. stenophylla

Endemic
Synonyms: Chrysopsis scabrifolia A. Nelson
Treatment appears in FNA Volume 20. Treatment on page 247. Mentioned on page 244.

Distal mid-stems grabrate to sparsely hispido-strigose, moderately to densely stipitate-glandular. Leaves bright to dark green, faces sparsely to moderately hispido-strigose (2–50 hairs/mm²), hair-bases usually broad (± pustulate), sparsely to densely stipitate-glandular; distal cauline blades usually linear-oblanceolate, rarely broadly so, (9–) 13.5–27 × 1.5–3.7 (–5) mm, margins often abundantly long-hispido-strigose along whole length. Phyllary faces usually sparsely strigose, abaxial moderately to densely stipitate-glandular, more so distally. 2n = 18, 36.


Phenology: Flowering May–Jul(–Oct).
Habitat: Prairies and rocky hills of c, s Great Plains
Elevation: 300–1400 m

Distribution

V20-540-distribution-map.gif

Colo., Iowa, Kans., Nebr., N.Mex., Okla., S.Dak., Tex.

Discussion

Variety stenophylla ranges from central Texas to southeastern South Dakota in a half dozen disjunct areas; it is most common in western Oklahoma and adjacent Kansas and Texas. The variety is known from one or two border counties in northeastern Colorado, northwestern Iowa, eastern New Mexico, and southeastern South Dakota. It is sparsely to moderately hispido-strigose and moderately stipitate-glandular. The presence of large, broad-based hairs along the margins of the distal leaves and peduncle bracts also contribute to the general appearance of the plant. The number of hairs and glands varies greatly and only the hairiest leaves take on a somewhat grayish green color; usually the leaves are bright green. The proximal stems are often brown, usually rather brittle, and naked, the leaves having fallen before flowering.

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 +
(A. Gray) Shinners +
cuneate +  and attenuate +
Chrysopsis hispida var. stenophylla +
compound +  and simple +
0.9 cm9 mm <br />0.009 m <br /> (1.65 cm16.5 mm <br />0.0165 m <br />) +
0.43 cm4.3 mm <br />0.0043 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1.65 cm16.5 mm <br />0.0165 m <br /> (3 cm30 mm <br />0.03 m <br />) +
linear-oblanceolate;narrowly oblanceolate +
reduced +
2.2mm;4.3mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
rhizomatous +  and taprooted +
additional +
not 2-lipped +  and actinomorphic +
ampliate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
compressed +  and obconic +
fertile +  and bisexual +
0.9 cm9 mm <br />0.009 m <br /> (1.35 cm13.5 mm <br />0.0135 m <br />) +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1.35 cm13.5 mm <br />0.0135 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
Colo. +, Iowa +, Kans. +, Nebr. +, N.Mex. +, Okla. +, S.Dak. +  and Tex. +
300–1400 m +
hispido-strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Prairies and rocky hills of c, s Great Plains +
stipitate-glandular +
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 /> (1.1 cm11 mm <br />0.011 m <br />) +
cylindro-turbinate;narrowly campanulate +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.15 cm11.5 mm <br />0.0115 m <br /> (1.65 cm16.5 mm <br />0.0165 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
7mm;11.5mm +
0.7mm;1.5mm +
sessile +  and petiolate +
dark green +
cauline +  and basal +
erect;spreading +
lanceolate +, triangular +  and deltate +
long-hispido-strigose +
long-hispido-strigose +
2-carpellate +
in 3 +  and 4 series +
stipitate-glandular +  and hispido-strigose +
0.2 cm2 mm <br />0.002 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Flowering May–Jul(–Oct). +
narrowly triangular-lanceolate +  and lanceolate +
stipitate-glandular +  and strigose +
ovate-oblanceolate +
linear-oblanceolate +  and oblanceolate +
Field & Lab. +
bearing subulate enations +, hairy +  and bristly +
subulate;convex +
6 +  and 10 +
3 +  and 40 +
linear +  and linear-lanceolate or triangular +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
exalbuminous +
short-branched +
ascending +  and erect +
1 +  and 50 +
appendaged +  and truncate +
papillate +  and smooth +
Chrysopsis scabrifolia +
Heterotheca stenophylla var. stenophylla +
Heterotheca stenophylla +
variety +
46 cm460 mm <br />0.46 m <br /> (65 cm650 mm <br />0.65 m <br />) +
18 cm180 mm <br />0.18 m <br /> (46 cm460 mm <br />0.46 m <br />) +
tree +, shrub +  and subshrub +