Flora of North America species comparison

yellow, slender.

yellow-orange, coarse.

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 to loose, glomerulate, often originating endogenously;

bracts at base of clusters, pedicels, and/or flowers 2–4(–6), ovate-orbiculate, fleshy, margins scarious, finely denticulate-fimbriate, apex erect, obtuse.

0–2 mm.

0–1 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, 4–6 mm, fleshy, not papillate;

calyx brown-yellow, cylindro-campanulate, 3/4 corolla tube length, divided to base or nearly so, finely reticulate, shiny, lobes orbiculate, bases broadly overlapping, margins scarious, minutely denticulate-fimbriate, midvein not carinate, apex rounded;

corolla white to creamy greenish, drying creamy brown, 3.8–4.5 mm, tube cylindric, 3–4 mm, not saccate, lobes spreading to reflexed, ovate, 1/3–1/4 corolla tube length, margins entire, apex obtuse, straight;

infrastaminal scales oblong to obovate, 2.6–3.3 mm, 3/4 to equaling corolla tube length, bridged at 0.9–1.3 mm, usually densely fimbriate in distal 1/2–3/4, sometimes reduced, 2-fid with 1–3 fimbriae on each side of filament insertion or dentate-winged, fimbriae 0.4–0.8 mm;

stamens exserted, shorter than corolla lobes;

filaments 0.2–0.3 mm;

anthers 0.3–0.4 × 0.3–0.4 mm;

styles filiform, 1–2 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.

conic-globose to broadly ellipsoid, 3–5(–6) × 2–2.5 mm, thickened and slightly umbonate 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.

1–4, obcompressed, broadly ovoid to broadly ellipsoid, 1.9–2.5 × 1.7–2.3 mm, hilum region subterminal.

= 30.