Packera texensis
Sida 20: 945.
fig. 1. 2003.
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
Distribution
Tex.
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.