Flora of North America species comparison

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

basal produced; flowering erect to decumbent or arcuate-ascending, (3–)5–60 cm, 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 elliptic-lanceolate or lanceolate to oblanceolate, 10–25 × 1.5–5 mm, apex acute, abaxial surface hairy on midvein and margins, adaxial glabrous.

1 per axil, 1–2 mm.

1 per axil, 1.5–3 mm.

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

calyx 1.9–2.3 mm, outer sepals shorter than inner.

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

broadly ovoid, depressed-globose, or subglobose, 1.8–2 × 1.7–2.1 mm, shorter to ± equaling calyx.

(1–)2(–3).

4–6, membranous coat gray.