Description
Key Characters:
Growth Form:
Perennial, stout, erect herbs 4–7 dm tall from a stout caudex.
Stems:
Caulescent, stems solitary, branching above base.
Roots:
Leaves:
Leaves simple.
Alternate basal leaves numerous, cauline leaves reduced upward.
Basal leaves cordate-ovate to reniform, 13-23 cm wide, palmately 3-lobed or 5-lobed and somewhat peltate, the segments cuneate to obovate, cleft to the middle or beyond and variously lobed. Cauline leaves more deeply lobed.
Blades of basal leaves coriaceous.
Margins of basal leaves spinulose–serrate, cauline leaves more deeply lobed.
Petioles of basal leaves1–3 dm long, abruptly short–sheathing; cauline leaves subsessile.
Stipules absent.
Flowers:
Flowers in +/- umbellately arranged terminal clusters of 2–5 pedunculate, capitate umbels plus solitary to clustered umbels in the upper leaf axils, umbels 10–20–flowered, peduncles 0.5–2.5 cm long. Involucre of 8–12 oblong-lanceolate bracts 1–3 mm long.
Perfect flowers 1–4, subsessile, staminate flowers 7–14, their pedicels 3–5 mm long.
Calyx teeth ovate, ca. 1 mm long, acute, evidently connate.
Corolla of 5 petals; petals yellow.
Stamens 5, inserted on an epigynous disk.
Ovary inferior, 2-celled; ovules 1 per cells, anatropous; styles 2, usually swollen at base into a stylopodium. Styles twice as long as calyx teeth, recurved.
Fruit:
Fruit ovoid; 4–6 mm long; 3–4 mm wide; mericarps slightly compressed dorsally in transection; covered with long; stout; uncinate; bulbous prickles; vittae obscure.
Seeds 1 per mericarp; embryo small; endosperm cartilaginous.
Ploidy:
Habitat:
On xeric; well–drained slopes; with Dodonaea; Schinus; shrubby Metrosideros; and grasses.
Elevation Range:
ca. 750 m.