Flora of North America species comparison

yellow, slender.

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.

loose to compact, glomerulate or corymbiform;

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

0–2 mm.

0.8–4(–5) mm, sometimes papillate.

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, 2.5–3.8 mm, membranous, perianth and ovary papillate;

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

corolla white, drying yellow to reddish brown, 1.4–3.4 mm, tube campanulate, later globose, 1.1–1.8 mm, saccate between lines of stamen attachments, lobes spreading to reflexed, triangular, equaling corolla tube length, margins entire, apex acute to acuminate, inflexed;

infrastaminal scales ovate to spatulate, 1.2–2 mm, equaling or longer than corolla tube length, bridged at 0.3–0.5 mm, rounded, uniformly densely fimbriate, fimbriae 0.3–0.7 mm;

stamens exserted, shorter than corolla lobes;

filaments 0.4–0.7 mm;

anthers 0.4–0.7 × 0.4–0.5 mm;

styles filiform, 0.9–1.6 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.

depressed-globose to depressed, 1.5–2.8 × 2.1–3.5 mm, not thickened or raised around relatively mid-sized to large interstylar aperture, not translucent, 1/2–2/3 of base enveloped by withered corolla, indehiscent.

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

2–4, angled, subglobose to broadly ellipsoid, 0.9–1.1 × 0.8–1 mm, hilum region subterminal.