Flora of North America species comparison

basal produced; flowering erect, 12–40 cm, sparsely sericeous.

basal not produced; flowering erect, (20–)30–40 cm, glabrous.

of flowering stems opposite or whorled;

blade linear to narrowly oblanceolate, 7–20 × 0.5–1.5 mm, apex rounded, abaxial surface sparsely pilose on midvein and margins, adaxial glabrous.

of flowering stems alternate;

blade linear to narrowly elliptic, 7–15 × 0.5–1.5 mm, apex rounded to acute, surfaces glabrous.

1 per axil, 0.5–1.5 mm.

1 per axil, 0.7–2 mm.

calyx 1.6–1.9 mm, outer sepals equaling or longer than inner.

calyx 1.5–1.9 mm, slightly indurate, discolored basally, outer sepals shorter than inner.

secund or not, broadly ovoid, 1.4–1.7 × 1.3–1.5 mm, shorter than or ± equaling calyx.

ovoid to globose, 1.2–1.6 × 1–1.4 mm, ± equaling calyx.

2–3(–5).

2–3.