Flora of North America species comparison

yellow, slender.

yellow-orange, slender to 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.

bracts ovate, membranous, margins entire, apex obtuse.

0–2 mm.

absent.

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, 3–4 mm, membranous;

papillae absent;

calyx creamy yellow, cupulate, equaling or longer than corolla tube, divided 1/2–2/3 its length, not notably reticulate or shiny, lobes broadly ovate, bases overlapping, margins entire, apex acute to acuminate;

corolla white, drying creamy yellow, initially globose, later urceolate, 2.8–3.7 mm, tube 2.5–3 mm, not saccate, lobes erect to spreading, ovate-triangular, 1/4–1/3(–1/2) corolla tube length, margins entire, apex subobtuse to acute, straight to incurved;

infrastaminal scales spatulate, 0.8–1.5 mm, 1/2–4/5 corolla tube length, bridged at 0.3–0.5 mm, base truncate, entire or 2-fid, short-fimbriate apically, fimbriae 0.03–0.15 mm;

stamens included or barely exserted, shorter than corolla lobes;

filaments 0.2–0.4 mm;

anthers 0.3–0.5 × 0.3–0.4 mm;

styles slightly subulate;

style plus stigmas 0.5–1.1 mm, shorter than ovary;

stigmas cylindric to terete, 0.3–0.6 mm, ± equaling styles.

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, ± angular, 2.8–3.5 × 3–4.2 mm, not thickened or raised around interstylar aperture, not translucent, capped by withered corolla.

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

4, usually connate in pairs, angled, subglobose or broadly ellipsoid to ovoid, 1.1–1.2 × 0.9–1 mm, hilum region terminal.

= 42.