Flora of North America species comparison

trailing (nonflowering shoots ascending at tip), laxly branched, not bearing rosettes.

erect, diffusely branching from base (hypocotyl extremely long), not bearing rosettes.

erect, usually simple, 5–10(–15) cm;

leaf blades triangular-ovate, base short-spurred;

offsets not formed.

erect, simple or branched, 2.5–6 cm;

leaf blades oblong-elliptic or ovate to lanceolate, base short-spurred;

offsets not formed.

(usually deciduous, if persistent, then blade white, soft, papery), alternate, (densely imbricate), spreading, sessile;

blade yellow-green, not glaucous, triangular-ovate, terete to semiterete (elliptic in cross section), (2–)5(–8) × 1–4 mm, base obtusely short-spurred, not scarious, apex obtuse.

(proximal leaves soon falling), alternate, ascending to nearly erect, petiolate (petiole 0.5–1.5 mm);

blade light green, often reddish tinged, not glaucous, oblong-elliptic or ovate to lanceolate, terete, 1.6–4.3(–12) × 1.1–1.8 mm, base short-spurred, not scarious, apex rounded with minutely papillose tip, (surfaces minutely papillose).

cymes, 2–12-flowered or flowers solitary, monochasially (1–)2(–3)-branched;

branches not recurved, rarely forked;

bracts similar to leaves, smaller.

terminal cymes, (2–)3–6-flowered, sometimes flowers solitary, simple or 1-branched;

branches recurved in bud, becoming erect in flower, forked;

bracts similar to leaves.

absent or to 1 mm.

0.6–3.1 mm, (continuous with calyx tube).

5-merous;

sepals erect to spreading, distinct basally, green, oblong-ovate, unequal, 2–3 × 1.3–2.3, mm, apex obtuse;

petals spreading, distinct, bright yellow, oblong-ovate to lanceolate, not carinate, 5–9 mm, apex acute to acuminate;

filaments yellow;

anthers yellow, (oblong);

nectar scales yellowish green, square.

(3–)4(–7)-merous;

sepals erect, connate basally, green, broadly ovate to reniform, equal, ca. 0.5 × 1 mm, apex rounded;

petals divergent, distinct, white, ovate-elliptic, slightly channeled, 1.4–4.2 mm, apex obtuse;

filaments white to pale reddish;

anthers dark red;

nectar scales white or pale yellow, subquadrate.

stellately patent in fruit, distinct, yellowish.

widely divergent in fruit, distinct, pale brown.

= 40, 60, 80, 100, 120.

= 8.