Flora of North America species comparison

yellow, slender.

yellow-orange, filiform.

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, umbelliform-racemiform;

bracts at base of clusters 1, at base of peduncles 0(or 1), ovate-lanceolate, membranous, margins entire, apex acute.

0–2 mm.

2–3(–5) 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, 2.5–4 mm, membranous, papillate, especially at base of corolla tube;

calyx yellow, cupulate-angular, 1/3–1/2 corolla tube length, divided ± to base, not or finely reticulate, ± glossy, lobes triangular to lanceolate, bases not overlapping, margins entire, midvein carinate and/or with multicellular protuberances, apex acute to acuminate;

corolla white, drying creamy yellow, 2–3.5 mm, tube cylindric, 1.5–2.2 mm, not saccate, lobes erect, triangular-lanceolate, equaling corolla tube length, margins entire, apex acute, straight;

infrastaminal scales ovate to oblong, 0.8–1.1 mm, 1/3–1/2 corolla tube length, bridged at 0.5–0.7 mm, rounded, uniformly short-fimbriate, fimbriae 0.2–0.3 mm;

stamens barely exserted, shorter than to equaling corolla lobes;

filaments 0.4–0.7 mm;

anthers 0.5–0.8 × 0.3–0.5 mm;

styles filiform, 1.5–3 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.

globose, 1.3–2.2 × 1–2.3 mm, slightly thickened and raised around relatively small interstylar aperture, translucent, capped by withered corolla, dehiscence circumscissile.

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

2–4, angled or slightly obcompressed, ellipsoid-oblong, 0.6–0.9 × 0.3–0.5 mm, hilum area lateral.