Flora of North America species comparison

yellow, slender.

yellow to 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, glomerulate or short-spiciform;

bracts at base of clusters and flowers (2–)4 or 5(–10), ovate-orbiculate to ovate-triangular, membranous, margins denticulate, apex erect, acute to cuspidate.

0–2 mm.

absent.

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, 5–6 mm, membranous, not papillate;

calyx straw yellow, campanulate, 1/2–2/3 corolla tube length, divided to base or nearly so, finely reticulate, shiny, lobes ovate, broadly overlapping, margins denticulate, midvein not carinate, apex acute to cuspidate;

corolla white, drying creamy, straw yellow, or light brown, 4–5.5 mm, tube cylindric, 2.4–3.5 mm, not saccate, lobes spreading to reflexed, ovate-lanceolate to oblong-ovate, 1/3–4/5 corolla tube length, margins entire, apex usually acute, sometimes cuspidate, straight;

infrastaminal scales oblong, 2.4–3.4 mm, equaling corolla tube length, bridged at 0.7–1.5 mm, rounded, uniformly densely fimbriate, fimbriae 0.2–0.4 mm;

stamens barely exserted, shorter than corolla lobes;

filaments 0.5–0.7 mm;

anthers 0.6–0.9 × 0.5–0.6 mm;

styles filiform, 2.5–3.3 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.

subglobose or ovoid to subconic, 3.4–4.5 × 2.2–3 mm, ± raised and thickened around relatively small interstylar aperture, not translucent, capped by withered corolla, indehiscent.

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

2–4, slightly obcompressed, subglobose, broadly ellipsoid to obovoid, 1.5–1.7 × 1.1–1.3 mm, hilum area subterminal.