Flora of North America species comparison

erect to decumbent, much branched, 10–50(–90) cm.

sometimes with lateral branches arisingobliquely from rosette, 30–80 cm.

in a basal rosette and cauline, basal 4–8 × 0.7–1 cm, cauline 1–7 × 0.3–1.5 cm;

blade usually grayish green, narrowly oblong to narrowly elliptic or narrowly obovate, margins remotely shallowly dentate to subentire;

bracts spreading, flat.

in a basal rosette and cauline, basal 7–17 × 0.5–1.5 cm, cauline 2–8 × 0.5–1.5 cm;

blade narrowly oblanceolate, gradually narrowly elliptic to narrowly oblong distally, margins lobed to remotely dentate or subentire;

bracts slightly longer than capsule they subtend.

open, lax, without lateral branches, mature buds usually not overtopping spike apex.

usually 1 opening per day near sunset;

buds erect, with free tips erect and appressed or slightly spreading, 0.5–2 mm;

floral tube 15–35 mm;

sepals3–11 mm;

petals yellow, very broadly obovate or obcordate, 4.5–16 mm;

filaments 4–11 mm, anthers 2–5.5 mm, pollen ca. 50% fertile;

style 23–45 mm, stigma surrounded by anthers at anthesis.

1 or 2 per spike opening per day near sunset;

buds erect, with free tips erect to spreading, 0.3–0.8 mm;

floral tube slightly curved upward to straight, 23–37 mm;

sepals 7–13 mm;

petals yellow, broadly elliptic to rhombic-ovate, 8–17 mm;

filaments 6–10 mm, anthers 1.5–4 mm, pollen ca. 50% fertile;

style 30–45 mm, stigma surrounded by anthers at anthesis.

cylindrical, sometimes slightly enlarged toward apex, 15–45 × 2–3 mm.

narrowly lanceoloid, 10–25 ×2–3 mm.

usually ellipsoid to broadly ellipsoid, rarely subglobose, 1–2 × 0.5–0.9 mm.

brown, sometimes flecked with darkred spots, ellipsoid, 1–1.3 × 0.5–0.7 mm.

= 14.

= 14.