Flora of North America species comparison

erect, usually unbranched near base, branched at each of several nodes proximal to first flower, less branched distally, branching dichotomous, 15–80 cm.

erect, profusely branched throughout, usually at every other node, branching dichotomous except near base, 10–50 cm.

much reduced distally, 15–60 × 1–5 mm;

petiole 0–10 mm;

blade narrowly lanceolate to sublinear.

reduced distally, 10–40 × 1–5 mm;

petiole 0–3(–10) mm;

blade very narrowly lanceolate to sublinear.

with flowers arising usually as proximally as first 10–20 nodes from base.

with flowers arising as proximally as first 5–15 nodes from base.

sepals 1–1.8 mm, reflexed singly or in pairs;

petals 2–3(–4) mm;

pollen ca. 50% fertile;

stigma hemispheric to subglobose, surrounded by anthers at anthesis.

sepals 0.4–0.8 mm, reflexed singly;

petals 0.7–1.2(–1.5) mm;

pollen 90–100% fertile;

stigma subglobose, surrounded by anthers at anthesis.

ascending or reflexed, terete to ± flattened, 6–15 × 0.8–1.1 mm, with conspicuous irregular constrictions between seeds, valve margins undulate, all valves free from septum after dehiscence, septum sinuous;

pedicel (2–)3–12 mm.

ascending to reflexed, subterete, 3–9 × 0.8–1.2 mm, with inconspicuous constrictions between seeds, valve margins entire or weakly undulate, all valves free from septum after dehiscence, septum straight;

pedicel (3–)5–12 mm.

2–10, ca. 1/2 aborted, arranged± parallel to septum and in alternating pattern between locules, adjacent seeds not overlapping, irregularly well spaced from each, forming a single row in capsule, brown or gray mottled with brown, 1.4–2 × 0.6–0.8 mm, glabrous or puberulent.

10–30, all developing, arranged ± parallel to septum and in alternating pattern between locules, crowded, overlapping, often appearing to form 2 irregular rows in each locule, brown or gray mottled with brown, 1–1.5 × 0.5–0.7 mm, glabrous.

= 14.

= 14.