Flora of North America species comparison

yellow, slender.

yellow to orange, 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.

dense to loose, paniculiform;

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

0–2 mm.

1–6 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, 4.5–6 mm, fleshy at base (receptacle and calyx base), not papillate;

calyx brownish, campanulate-cupulate, 1/4–1/2 corolla tube length, divided 2/3 its length, not reticulate and shiny, lobes triangular-ovate, bases slightly overlapping, margins entire, midvein not carinate, apex acute;

corolla white, drying creamy brown, 4.4–5.8 mm, tube campanulate-cylindric, becoming urceolate, 2–3.5 mm, saccate or with horizontal ridges between stamen attachments, lobes reflexed, lanceolate, somewhat shorter than to equaling corolla tube length, margins entire, apex acute, straight;

infrastaminal scales absent;

stamens exserted, shorter than corolla lobes;

filaments 0.3–0.6 mm;

anthers 0.7–1.1 × 0.3–5.5 mm;

styles filiform, 1.2–3 mm, equaling or 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 obovoid, 1.6–2.3 × 1.8–2.5 mm, apically enlarged or thickened, surrounded and capped by withered corolla, top not or barely visible, interstylar aperture not visible, indehiscent.

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

1–4, obcompressed, broadly ellipsoid to obovoid, 0.9–1.4 × 0.8–1.2 mm, hilum region lateral.