Flora of North America species comparison

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

basal not produced; flowering spreading-ascending, (10–)20–30 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;

blade elliptic-ovate to orbiculate, 5–12 × 4–10 mm, apex acute, often mucronate, abaxial surface pilose to tomentose, adaxial pilose.

1 per axil, 1–2 mm.

2–3 per axil, 1.5–2.5 mm.

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

calyx 1.8–2 mm, outer sepals shorter than inner.

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

ellipsoid to obovoid, 1.8–2 × 1.2–1.5 mm, ± equaling calyx.

(1–)2(–3).

1–2.