Flora of North America species comparison

erect, branched or unbranched near base, much branched distally, usually with 1 or 2 nodes between branches, distal branching dichotomous or lateral branches shortened, 5–60 cm.

erect, unbranched or spreading and branched near base, secondary branches few or none, branching not dichotomous, 5–20(–30) cm.

reduced distally, 10–60 × 1–5 mm;

petiole 0–10 mm;

blade very narrowly lanceolate.

little reduced distally, crowded and often exceeding subtending internode, 10–25 × 1–3 mm;

petiole 0–10 mm;

blade very narrowly elliptic or lanceolate to sublinear.

with flowers arising usually as proximally as first 1–20 nodes from base.

with flowers arising as proximally as first 1–3 nodes from base.

sepals 0.9–3(–5) mm, reflexed singly or in pairs;

petals 1.2–5(–7) mm;

pollen 90–100% fertile;

stigma hemispheric to subglobose, exserted beyond anthers of longer stamens or surrounded by them at anthesis.

sepals 0.6–1.3 mm, reflexed singly;

petals 0.8–1.5mm;

pollen 90–100% fertile;

stigma subglobose, surrounded by anthers at anthesis.

ascending to reflexed, subterete, 3–15 × 1–1.5 mm, with inconspicuous or conspicuous constrictions between seeds, valve margins somewhat undulate, all valves free from septum after dehiscence, septum straight or sinuous;

pedicel 2–10(–15) mm, usually shorter than capsule.

ascending, flattened, 8–17 × 1–2 mm, not constricted between seeds, valve margins entire or minutely undulate, 2 valves remaining attached to septum after dehiscence, septum straight;

pedicel 0–0.5 mm.

(3–)6–18, all or most developing, arranged ± parallel to septum and in alternating pattern between locules, crowded, overlapping, often appearing to form 2 irregular rows in each locule, or well spaced, forming a single row in capsule, brown, sometimes mottled with gray, 1–1.6 × 0.5–0.8 mm, glabrous or puberulent.

24–50, all developing, arranged obliquely to septum and subopposite seeds in adjacent locule, forming 2 even rows in capsule, light brown, 0.7–1.1 × 0.3–0.4 mm, glabrous.

= 28.

= 14.