Flora of North America species comparison

basal produced; flowering erect, 25–40 cm, sparsely sericeous.

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

of flowering stems opposite to subopposite;

blade linear-lanceolate to narrowly oblanceolate, 10–20 × 1–1.5 mm, apex acute, usually indurate, abaxial surface sparsely pilose on midvein and margins, adaxial 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.

1 per axil, 1–2 mm.

1 per axil, 0.5–1.5 mm.

calyx 1.8–2 mm, indurate, shiny, yellow-brown basally in fruit, outer sepals shorter than or equaling inner.

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

ellipsoid to ovoid, 1.5–2 × 1–1.2 mm, ± equaling to slightly longer than calyx.

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

(1–)2(–3).

2–3(–5).