Brickellia cylindracea

A. Gray & Engelmann

Proc. Amer. Acad. Arts 1: 46. 1847.

Endemic
Treatment appears in FNA Volume 21. Treatment on page 497. Mentioned on page 493.

Perennials, 40–120 cm (caudices woody). Stems branched, pubescent, glanddotted. Leaves mostly opposite, sometimes alternate or subopposite; petioles 0–3 mm; blades 3-nerved from bases, lanceolate to obovate, 20–60 × 12–30 mm, bases ± cuneate, margins crenate to serrate, apices obtuse to acute, abaxial faces tomentose, often densely glanddotted as well (venation raised, reticulate), adaxial faces pubescent and glanddotted. Heads in ± dense, racemiform or paniculiform arrays. Peduncles 2–15 mm, densely tomentose, often glanddotted. Involucres cylindric to campanulate, 8–13 mm. Phyllaries 18–22 in 5–7 series, greenish, often purplish-tinged, 6–8-striate, unequal, margins scarious (apices acute to acuminate); outer ovate (sparsely villous, glanddotted, lengths no more than 1/2 inner, margins long-ciliate), inner narrowly lanceolate to linear-oblong (glabrous). Florets 10–21; corollas greenish, yellow, or yellow-orange, often purple-tinged, 5–7 mm. Cypselae 3.5–5 mm, sparsely to densely pubescent; pappi of 30–35, white to tawny, barbellate bristles. 2n = 18.


Phenology: Flowering Jun–Nov.
Habitat: Dry limestone hillsides
Elevation: 100–600 m

Discussion

L. D. Flyr (1970) rightly noted that Brickellia cylindracea is variable in leaf size, shape, and texture as well as arrangements of heads, and added that it is not easily distinguished from B. conduplicata (= B. lemmonii var. conduplicata), which accounts for most of the specimens in west Texas. Brickellia cylindracea has a more eastern distribution than B. lemmonii var. conduplicata and appears to have a strong preference for limestone soils. Some specimens from limestone outcrops in west Texas blur distinction between the two species.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Brickellia cylindracea"
not tailed +, truncate +, rounded +  and obtuse +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
racemiform +, paniculiform +, cymiform +  and corymbiform +
indeterminate +  and determinate +
Randall W. Scott +
A. Gray & Engelmann +
cuneate +
enlarged +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
dissected +, lobed +, toothed +  and entire +
lanceolate;obovate +
12mm;30mm +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
white +  and tawny +
purple-tinged +, yellow-orange +, yellow +  and greenish +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
prismatic +
fertile +  and bisexual +
100–600 m +
tomentose +, strigose +, glandular-puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry limestone hillsides +
paniculiform +  and racemiform +
indeterminate +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
cylindric;campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
sessile +  and petiolate +
subopposite +, alternate +  and opposite +
lanceolate +  and lance-linear +
entire +  and dentate +
crenate +  and serrate +
2-carpellate +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering Jun–Nov. +
18 +  and 22 +
Proc. Amer. Acad. Arts +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Brickellia cylindracea +
Brickellia +
species +
cylindric +
40 cm400 mm <br />0.4 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +