Flora of North America species comparison

yellow, slender.

yellow to pale orange, slender to medium.

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.

loose, paniculiform;

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

0–2 mm.

0.5–2.5(–3) 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, 3–4.6(–5) mm, membranous, not papillate;

calyx yellow, cylindric-cupulate, equaling corolla tube length, divided 1/2–2/3 its length, reticulate, not shiny, lobes ovate-triangular, bases slightly overlapping, margins entire, midvein not carinate, without multicellular protuberances, apex obtuse to subacute;

corolla white, drying creamy white, 3–4.4 mm, tube narrowly campanulate to cylindro-campanulate, 1.8–2.5 mm, not saccate, lobes spreading to reflexed, triangular, equaling corolla tube length, margins entire, apex acute, inflexed;

infrastaminal scales obovate to oblong-spatulate, 1.5–2.1 mm, 3/4–4/5 corolla tube length, bridged at 0.4–0.6 mm, rounded, uniformly densely fimbriate, fimbriae 0.1–0.3 mm;

stamens exserted, shorter than corolla lobes;

filaments 0.3–0.4 mm;

anthers 0.4–0.7 × 0.3–0.5 mm;

styles filiform, 1.3–1.6 mm, equaling 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, 1.8–3.2 × 2.2–3.6 mm, not thickened or raised around relatively large interstylar aperture, not translucent, 1/2+ enveloped by withered corolla, indehiscent.

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

1–4, obcompressed, broadly ellipsoid to obovoid, 1–1.4 × 0.9–1.2 mm, hilum region subterminal.