Packera texensis

O’Kennon & Trock

Sida 20: 945.

,

fig. 1. 2003.

Treatment appears in FNA Volume 20. Treatment on page 601. Mentioned on page 573, 575.

Perennials, 20–40+ cm; taprooted (caudices woody, ascending to erect). Stems usually 1 or 2–5, rarely 6–20, clustered, glabrous but for tomentose leaf-axils. Basal leaves petiolate; blades elliptic-ovate, broadly oblanceolate, or lyrate (lateral lobes 3–9 pairs), 40–70 × 15–25 mm, bases tapering, margins irregularly and deeply parted or lobed (apices incised). Cauline leaves usually gradually, sometimes abruptly, reduced (petiolate or sessile; narrowly elliptic to oblanceolate, pinnatifid). Heads 3–20+ in open or congested, corymbiform arrays, frequently subtended by smaller arrays from leaf-axils. Peduncles ebracteate or bracteate, glabrous. Calyculi usually 0, sometimes inconspicuous. Phyllaries 13 or 21, light green, 4–6+ mm, glabrous. Ray-florets (10–) 13; corolla laminae 5–7+ mm. Disc-florets 60–75+; corolla-tubes 2–3 mm, limbs 2–3 mm. Cypselae 1–1.5 mm, hirsute on ribs; pappi 3–5 mm. 2n = 36.


Phenology: Flowering mid Feb–late Apr.
Habitat: Limestone plateaus overlain by dry, granitic sands and gneiss, roadsides, partially shaded areas, oak woodlands
Elevation: 200–400 m

Discussion

Packera texensis is known only from granitic sands of the Central Mineral Region on the Edwards Plateau of central Texas. It appears to be substrate specific.

Selected References

None.

Lower Taxa

None.
... more about "Packera texensis"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +, congested +  and open +
indeterminate +  and determinate +
Debra K. Trock +
O’Kennon & Trock +
tapering +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
lyrate;oblanceolate;lyrate;oblanceolate;elliptic-ovate +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
winged;nerved;ribbed +
inconspicuous +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
pale-yellow +  and deep orange-red +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
200–400 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Limestone plateaus overlain by dry, granitic sands and gneiss, roadsides, partially shaded areas, oak woodlands +
discoid +  and radiate +
in compact or congested to open corymbiform cymiform or subumbelliform , , , arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;cylindric +
sessile +  and petiolate +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
lobed +  and parted +
2-carpellate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
bracteate +  and ebracteate +
Flowering mid Feb–late Apr. +
linear +  and ensiform +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Sida +  and fig. +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
prostrate +  and ascending +
6 +  and 20 +
appendaged +  and truncate +
papillate +
Compositae +
Packera texensis +
species +
campanulate +
serrate +  and denticulate +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +