Flora of North America species comparison

erect, simple to loosely clustered, terete, 15–95 cm, simple to well branched, densely strigillose, often mixed glandular puberulent on inflorescence, rarely with faint strigillose lines decurrent from margins of petioles.

usually suberect, rarely matted, terete, 1.5–50 cm, often with sprawling, decumbent proximal branches, rarely simple, glabrous proximally or throughout, sometimes ± densely strigillose and/or villous distally.

opposite proximally, usually alternate, rarely fasciculate distally, subsessile;

blade linear to very narrowly elliptic or sublanceolate, 2–7.5 × 0.1–0.7 cm, usually longer than internodes, base rounded to subcuneate, margins subentire, 4–7 inconspicuous teeth per side, sometimes revolute, lateral veins inconspicuous, apex obtuse proximally to acute distally, both surfaces densely strigillose, increasing distally;

bracts not much reduced.

crowded, subsessile, blade lanceolate to narrowly lanceolate or oblong, 0.8–3.5 × 0.2–0.6(–1) cm, longer than subtending internodes, base cuneate, margins evenly serrulate, 4–7 teeth per side, lateral veins obscure, 2–5 per side, apex acute, surfaces strigillose and ± villous, at least along veins and margins;

bracts not much reduced.

erect racemes, densely strigillose, often mixed sparsely glandular puberulent.

erect spikes, congested, unbranched, densely strigillose and ± villous or subglabrous.

erect;

buds 3–5 × 1.5–2.5 mm;

pedicel 5–12 mm;

floral tube 0.8–1.5 × 1.2–1.8 mm, ring of spreading hairs at mouth inside;

sepals 2.5–4.5 × 0.9–1.3 mm, abaxial surface strigillose;

petals obcordate, white to light pink, 3.5–7 × 1.6–4 mm, apical notch 1–1.8 mm;

filaments white or cream, those of longer stamens 0.8–3.5 mm, those of shorter ones 0.6–2.5 mm;

anthers cream, 0.5–0.9 × 0.4–0.6 mm;

ovary 12–18 mm, densely strigillose, sometimes mixed glandular puberulent;

style cream, 2–3.8 mm, stigma narrowly clavate, entire, 1–1.8 × 0.5–1.2 mm, usually surrounded by, rarely exserted beyond, anthers.

erect, often hidden by subtending bracts, often cleistogamous;

buds 1.2–2 × 0.7–1.1 mm;

floral tube 0.3–1.1 × 0.2–0.8 mm, raised ciliate ring proximal to mouth inside;

sepals reddish green, 0.7–1.9 × 0.6–1.2 mm;

petals pale pink, fading purplish rose, 0.9–3.5 × 0.7–0.9 mm, apical notch 0.3–1.3 mm;

filaments light pink, those of longer stamens 0.5–1.5 mm, those of shorter ones 0.4–0.9 mm;

anthers pale yellow, 0.4–0.8 × 0.3–0.5 mm;

ovary 3–5 mm, usually densely villous;

style pale pink, 0.6–1.8 mm, stigma clavate, irregularly 4-lobed to subentire, 0.5–1 × 0.2–0.6 mm, surrounded by longer anthers.

straight, narrowly cylindrical, 35–80 mm, surfaces densely strigillose;

pedicel 10–35 mm.

cylindrical to subfusiform, ± terete, 4.5–8 mm, beak 0.8–1 mm, usually dehiscing on distal 1/3, sometimes tardily splitting to base, central axis prematurely disintegrating, villous;

subsessile.

narrowly fusiform to narrowly obovoid, 1.5–2.2 ×0.5–0.7 mm, chalazal collar 0.1–0.2 mm, ± pronounced, surface papillose;

coma persistent, dingy white, 6–8 mm.

7–14 per tightly packed row, irregularly angular-fusiform, 1–1.3 × 0.4–0.6 mm, chalazal collar absent, surface irregularly reticulate.

= 36.

= 30.