Flora of North America species comparison

1–20, clustered, erect, simple or branched from proximal nodes, glabrous or strigose to pilose.

proximal opposite or subopposite, distal usually alternate, petiolate or sessile;

stipules linear-subulate and minute to leaflike, 3–40 mm, glabrous or hirsute, gland-tipped;

petiole 0–1 mm;

blade linear, narrowly elliptic, lanceolate, or oblanceolate, 1–5.5(–6) × 0.1–0.8(–1.1) cm, base attenuate, margins usually entire, ciliate or eciliate, apex acute to acuminate, surfaces glabrous, strigose, or pilose.

1-flowered;

peduncle usually pendant at anthesis, sometimes horizontal or erect, usually pendant in fruit, 3–14 mm, hirsute to densely puberulent, occasionally glabrous on segment distal to joint;

bracteoles present.

sepals appressed to corolla, ovate to lanceolate, margins ciliate or eciliate, apex acute;

petals: upper greenish white, cream, or yellowish, with purple tips, oblong, 2–2.5 mm, apex acute to rounded, glabrous;

laterals similar to upper except 3 mm;

lowest greenish white, cream, or yellowish, sometimes tinged purplish, 2.5–6 mm, claw 2–3 × 0.5 mm, distal limb broadly ovate to orbiculate, ± concave at anthesis, 1–3 mm wide, apex rounded to obtusely angled, adaxial surface usually bearded basally and on claw;

presence of cleistogamous flowers not determined.

ovoid to globose, 4–7 mm.

6, dark brown to shiny black, subglobose, ± flattened with angular edges, or broadly ovoid, 1.8–2.5(–3) mm.

= 16, 24, 32.