Flora of North America species comparison

yellow, slender.

pale 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 fasciculate;

bracts at base of clusters 1, at base of pedicels 1 or 2, ovate-triangular to linear, membranous, margins entire, midvein with 1–3(–5) hornlike, multicellular protuberances, apex cuspidate to long-attenuate, ± recurved.

0–2 mm.

0.1–6 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, 2.5–3.6(–4) mm, fleshy, papillate or not;

calyx golden yellow to brown, campanulate, ± angled, equaling corolla tube length, divided 1/2–2/3 its length, reticulate and shiny or ± fleshy, lobes triangular-ovate or broadly ovate to subround, membranous, bases overlapping, margins irregularly serrulate, denticulate, or entire, midvein with 1 or 2(–5) hornlike, multicellular protuberances 0.1–0.3 mm, apex subacute, rounded, or obtuse;

corolla white, drying creamy yellow, 2–3.5 mm, tube campanulate, 1.2–1.6 mm, not saccate, lobes spreading to reflexed, triangular-ovate, equaling corolla tube length, margins entire or irregularly denticulate, apex ± cucullate, acute, cuspidate (sometimes 2 or 3-cuspidate), mucronate, or truncate, inflexed;

infrastaminal scales spatulate to obovate, 0.7–1 mm, 3/4 corolla tube length, bridged at 0.2–0.4 mm, densely fimbriate, fimbriae 0.2–0.3 mm;

stamens exserted, shorter than corolla lobes;

filaments 0.4–0.8 mm;

anthers 0.5–0.8 × 0.4–0.5 mm;

styles stout, filiform, 0.5–1.2 mm, shorter than 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.

not seen, lack of dehiscence line in the ovary indicates they are indehiscent.

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

not seen.