Bradburia hirtella

Torrey & A. Gray

Fl. N. Amer. 2: 250. 1842.

Endemic
Synonyms: Chrysopsis texana G. L. Nesom
Treatment appears in FNA Volume 20. Treatment on page 212. Mentioned on page 211.

Annuals, rarely perennials, 15–80 cm; woody caudices taprooted. Stems 1 (rarely multistemmed), erect, branches few from mid to distal nodes, sparsely pilose. Leaves: basal usually withering by flowering, blades linear-oblanceolate, 30–60 × 3–8 mm, margins entire to apically dentate, coarsely hispido-pilose (apices obtuse to acute), faces sparsely hispido-pilose; cauline often only with distal present at flowering, blades linear-oblanceolate to linear, margins obscurely dentate or entire, coarsely hispid-pilose, faces sparsely hispid-pilose, stipitate-glandular. Heads 1–15 (–50). Peduncles 1.5–10 cm, moderately short-hispido-pilose, stipitate-glandular distally; bracts foliaceous, grading into phyllaries. Phyllaries in 4–5 series, lanceolate to linear-lanceolate, strongly unequal, margins broadly scarious, faces sparsely hispido-pilose proximally, sparsely stipitate-glandular. Ray-florets (7–) 10 (–14); laminae 6–13 × 1–2 mm. Disc-florets 11–25, functionally staminate, sterile; corollas 3–4 mm, lobes 0.3–0.4 mm. Cypselae (ray) stramineous to brown, triangular in section, slightly ribbed, faces densely strigose; pappi in 2–3 series, of sometimes reddish proximally, yellow to tan or white distally, narrow to broad-based bristles, outer basally broader, 1–2.5 mm, inner, 2–3 mm. 2n = 6, 8.


Phenology: Flowering late spring–early summer.
Habitat: Mixed sand and gravel soils, in open, barren to grass-covered areas in open pine-oak-juniper woods, disturbed roadsides
Elevation: (0–)70–200 m

Discussion

Bradburia hirtella grows in the southwestern coastal plain province in Texas and southern Louisiana, and at a few disjunct locations, possibly as waifs (K. N. Gandhi and R. D. Thomas 1989). It occurs in the southern portion of post oak savanna of eastern Texas; populations are frequent on the Oakville Escarpment. It also occurs on the Black Branch Barrens of the Catahoula formation (in Jasper County) of the piney woods area of eastern Texas. Nearly all populations consist of annuals with 2n = 6; the southernmost population(s) in Dewitt County, Texas, include multistemmed perennials with 2n = 8 (J. C. Semple and C. C. Chinnappa 1984).

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.

... more about "Bradburia hirtella"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
John C. Semple +
Torrey & A. Gray +
decurrent +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
hispido-pilose +
linear-oblanceolate;linear +
3mm;8mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
stramineous +  and rusty brown +
linear-lanceolate +  and elliptic-oblong +
not 2-lipped +  and actinomorphic +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ribbed +  and smooth +
stramineous +  and brown +
triangular +
fertile +  and bisexual +
La. +  and Tex. +
(0–)70–200 m +
entire +  and apically dentate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
strigose +, stipitate-glandular +, hispido-pilose +  and hispid-pilose +
linear-oblanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Mixed sand and gravel soils, in open, barren to grass-covered areas in open pine-oak-juniper woods, disturbed roadsides +
in lax paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
campanulate +
sessile +  and petiolate +
cauline +  and basal +
triangular +
entire +, dentate +  and apically dentate +
30mm;60mm +
hispid-pilose +  and hispido-pilose +
linear-oblanceolate +
3mm +  and 8mm +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
2-carpellate +
yellow +  and tan or white +
persistent +
stipitate-glandular +  and short-hispido-pilose +
1.5 cm15 mm <br />0.015 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering late spring–early summer. +
lanceolate +  and linear-lanceolate +
Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
semple1984a +
exalbuminous +
branched +  and simple +
appendaged +  and truncate +
papillate +  and smooth +
Chrysopsis texana +
Bradburia hirtella +
Bradburia +
species +
cylindric +
expanded +
perennial +  and annual +
15 cm150 mm <br />0.15 m <br /> (80 cm800 mm <br />0.8 m <br />) +
tree +, shrub +  and subshrub +