Flora of North America species comparison

yellow-orange, medium.

yellow to orange, medium.

dense to loose, spiciform or paniculiform, commonly originating endogenously;

bracts at base of clusters 1 or 2, at base of pedicels and/or flowers 0 or 1, ovate, membranous, margins entire or serrulate, apex obtuse to acute.

dense, ± glomerulate;

bracts at base of clusters 1, at base of pedicels and/or flowers 0 or 1, lanceolate to ovate, membranous, margins entire, apex acute to acuminate.

0–1 mm.

0–1 mm.

(3 or)4(or 5)-merous, 2–3 mm, membranous, not papillate;

calyx yellow-brown, shallowly cupulate, 1/2 corolla tube length, divided 2/3 its length, not reticulate, not shiny, lobes oblong-ovate, bases slightly overlapping, margins entire or serrulate, midvein not carinate, apex obtuse;

corolla white, drying creamy white, 1.8–2.8 mm, tube cylindric-campanulate to cylindric, 1.1–2.2 mm, not saccate, lobes spreading, ovate, 1/3–1/2 corolla tube length, margins entire, apex obtuse, straight;

infrastaminal scales oblong, rounded, 0.9–1.7 mm, shorter than to equaling corolla tube length, bridged at 0.2–0.4 mm, sparsely fimbriate, more densely distally, fimbriae 0.1–0.3 mm;

stamens included to slightly exserted, equaling corolla lobes;

filaments 0.2–0.4 mm;

anthers 0.2–0.4 × 0.2–0.4 mm;

styles filiform or narrowly terete, (0.6–)1–2 mm, equaling or longer than ovary.

5-merous, 5–7(–9 mm), membranous, papillate on corolla lobes;

calyx usually straw yellow, sometimes brown, campanulate, 1/2 corolla tube length, divided 3/5–2/3 its length, finely reticulate, shiny, lobes broadly ovate to lanceolate, bases overlapping, margins entire, midvein not carinate, apex acute, sometimes cuspidate;

corolla white, drying creamy yellow or brownish, 4.5–6.6 mm, tube cylindric, 2.5–3.5(–4.5) mm, not saccate, usually with horizontal ridges between stamen attachments, lobes spreading to reflexed, ovate-triangular, 1/4–1/3 corolla tube length, margins entire, apex acute, often slightly acuminate, straight;

infrastaminal scales oblong to spatulate, 1.5–2.2 mm, 1/2–2/3 corolla tube length, bridged at 0.3–0.7 mm, rounded, uniformly densely to sparsely fimbriate, fimbriae 0.2–0.4 mm;

stamens slightly exserted, shorter than corolla lobes;

filaments 0–0.1 mm;

anthers 0.8–2 × 0.4–0.5 mm;

styles 1–1.5 mm, equaling ovary.

depressed-globose to globose, 2.5–3.2(–4) × 2–4 mm, not thickened or raised around relatively small interstylar aperture, not translucent, capped by withered corolla, indehiscent.

ovoid to ellipsoid, 1.5–3 × 1.2–2.5 mm, narrowed and thickened, forming collar around relatively small interstylar aperture, not translucent, capped by withered corolla, indehiscent.

1 or 2, obcompressed, broadly ovoid, 1.4–2 × 1.3–1.4 mm, hilum region terminal.

1, usually subglobose to broadly ovoid, rarely slightly obcompressed, 1.3–1.7 × 1.2–1.5 mm, hilum region terminal.

= 60.