Flora of North America species comparison

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

unbranched or branched primarily distally, 25–70 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 6–12 × 0.7–2 cm, cauline 2–10 ×0.5–3 cm;

subsessile;

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

bracts shorter than capsule they subtend, 0.5–1.7 cm.

open, lax, usually unbranched, mature buds usually 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–few per spike opening per day near sunset;

buds erect, with free tips erect, 1–3 mm;

floral tube nearly straight, 20–40 mm;

sepals 15–25 mm;

petals yellow, broadly elliptic to rhombic-ovate, 20–30 mm;

filaments 17–22 mm, anthers 4–7 mm, pollen 85–100% fertile;

style 50–65 mm, stigma usually exserted beyond anthers at anthesis.

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

narrowly lanceoloid, 15–33 × 2–3 mm.

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

dark brown, ellipsoid, 1–1.4 ×0.4–0.6 mm.

= 14.

= 14.