Flora of North America species comparison

yellow, slender.

yellowish, slender.

loose, umbelliform;

bracts at base of clusters 1, at base of pedicels and/or flowers 0 or 1, ovate-lanceolate, membranous, margins entire, apex acute.

dense, paniculiform-glomerulate;

bracts at base of clusters 1, at base of pedicels and/or flowers 0 or 1, subround to broadly ovate, membranous, margins entire, apex acute to short-acuminate, papillate.

0–2 mm.

0–1 mm.

4- or 5-merous, 2.8–3.3 mm, membranous, not papillate;

calyx slightly zygomorphic, creamy yellow, broadly campanulate, 1-1/3–1-1/2 corolla tube length, divided 1/2–3/5 its length, not reticulate or shiny, lobes ovate, bases not overlapping, margins entire, midvein not carinate, apex long-attenuate;

corolla white, drying creamy yellow, 2.6–3 mm, tube campanulate, 1.2–1.5 mm, not saccate, lobes suberect, triangular-ovate, longer than corolla tube length, margins entire, apex lance-attenuate, straight;

infrastaminal scales relatively poorly developed, oblong, 0.6–1 mm, 1/2–3/4 corolla tube length, bridged at 0.2–0.3 mm, usually reduced to denticulate wings, rarely 2-fid with 1–3 fimbriae on each side of filament attachments, 0.1–0.2 mm;

stamens included or barely visible through corolla sinuses, shorter than corolla lobes;

filaments 0.2–0.5 mm;

anthers 0.2–0.4 × 0.2–0.3 mm;

styles terete to slightly subulate, 0.3–0.7 mm, 1/4 ovary length.

5-merous, 4.5–5 mm, membranous, calyx and corolla lobes papillate;

calyx straw yellow, campanulate, 1/2–3/4 corolla tube length, divided 2/3 its length, finely reticulate, not shiny, lobes ovate-triangular, bases overlapping, margins entire, midvein not carinate, apex acute to short-acuminate;

corolla white, drying creamy white, 3.5–4.5 mm, tube cylindric, 2.2–2.8 mm, not saccate, lobes reflexed, ovate-triangular, shorter than to equaling corolla tube length, margins entire, apex acute to short-acuminate, straight;

infrastaminal scales oblong-spatulate to obovate, 2–2.5 mm, 1/2 to equaling corolla tube length, bridged at 0.2–0.5 mm, rounded, densely fimbriate in distal 1/2, fimbriae 0.2–0.3 mm;

stamens barely exserted, shorter than corolla lobes;

filaments 0.3–0.7 mm;

anthers 0.7–1.1 × 0.2–3 mm;

styles filiform, 2.8–4 mm, longer than ovary.

ellipsoid-ovoid, ovoid-conic, or globose to depressed-globose, 2–3.2 × 2–3.6 mm, not thickened or raised around relatively small interstylar aperture, translucent, proximal 1/2 surrounded by withered corolla, indehiscent.

globose to depressed-globose, 2.9–4 × 3–3.2 mm, thickened and raised around inconspicuous interstylar aperture, translucent, loosely surrounded and capped by withered corolla, dehiscence circumscissile.

2–4, obcompressed, subglobose, 0.8–1.1 × 0.8–1 mm, hilum subterminal.

3 or 4, angled, broadly ellipsoid, 1–1.2 × 0.6–0.8 mm, hilum region terminal.