Flora of North America species comparison

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

basal produced; flowering erect, 25–45 cm, densely 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 alternate or subopposite;

blade narrowly oblanceolate, 13–20 × 1.5–3 mm, apex acute, often mucronate, abaxial surface pilose, adaxial glabrous.

1 per axil, 1–2 mm.

1 per axil, 1.6–2 mm.

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

calyx 1.6–1.8 mm, outer sepals shorter than inner.

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

subglobose to broadly ovoid, (1.8–)2–2.5 × 2–2.5 mm, ± equaling calyx.

(1–)2(–3).

3–4.