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, 3–30-flowered, flowers sessile or subsessile, embedded in inflorescence of host;

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

0–2 mm.

0–0.6 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.

4(or 5)-merous, 3–4 mm, membranous, calyx and corolla papillate;

calyx straw yellow, campanulate, equaling or longer than corolla tube length, divided 1/2–2/3 its length, finely reticulate, shiny, lobes triangular-ovate, bases not overlapping, margins entire, midvein not carinate, apex acuminate to long-attenuate, recurved;

corolla drying white or creamy white to brownish, 2.8–3.5 mm, tube cylindric-campanulate to urceolate, 1.5–2 mm, not saccate, lobes suberect to spreading, triangular-ovate, equaling corolla tube length, margins entire, apex acute to long-attenuate, recurved;

infrastaminal scales oblong-ovate, 1–1.3 mm, 1/2–2/3 corolla tube length, bridged at 0.2–0.3 mm, rounded, uniformly densely fimbriate, fimbriae 0.1–0.3 mm;

stamens included, shorter than corolla lobes;

filaments 0.1–0.3 mm;

anthers 0.4–0.5 × 0.3–0.4 mm;

styles filiform, 0.4–1.1 mm, 1/4 to ± 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, 1.2–1.5 × 0.8–1.2 mm, not thickened or raised around relatively small interstylar aperture, not translucent, completely enclosed or capped by withered corolla, indehiscent.

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

1–4, obcompressed to slightly angled, subglobose to broadly ellipsoid, 0.9–1.2 × 0.8–1.1 mm, hilum region subterminal.