Flora of North America species comparison

yellow, slender.

orange, 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, umbelliform to subglomerulate;

bracts at base of clusters 1, at base of pedicels 0 or 1, ovate to lanceolate, membranous, margins entire, apex acute to acuminate.

0–2 mm.

0.5–2 mm, sometimes with domelike cells.

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, 3.5–6 mm, membranous, papillate or corolla lobes, sometimes calyx, with domelike cells;

calyx creamy yellow, usually drying dull brown, rarely drying yellow, campanulate to cupulate, equaling corolla tube length, divided 2/3 its length, not reticulate or shiny, lobes ovate-triangular, bases slightly overlapping, margins entire, midvein not carinate, apex acute to acuminate;

corolla white, generally drying dark brown (rarely creamy yellow), 2.8–5.4 mm, tube campanulate, 1.5–2.6 mm, not saccate, lobes erect to spreading, broadly ovate to rhombic-ovate, equaling corolla tube length, bases overlapping, margins entire or irregular, apex usually acute to cuspidate, sometimes appearing tridentate, straight;

infrastaminal scales oblong to slightly obovate, 1–1.5 mm, 1/2–3/4 corolla tube length, bridged at 0.3–0.5 mm, with few short fimbriae 0.05–0.1 mm;

stamens included in completely open flower, shorter than corolla lobes;

filaments 0.3–0.6 mm;

anthers 0.3–0.6 × 0.3–0.5 mm;

styles filiform, 0.4–0.9 mm, shorter 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.

ovoid, 2–3.6 × 1.4–2.1 mm, thickened around relatively small interstylar aperture, not translucent, surrounded by withered corolla, indehiscent.

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

1 or 2, ± obcompressed, broadly ellipsoid to subglobose, 1.4–1.9 × 1.2–1.4 mm, hilum subterminal.