Flora of North America species comparison

alternate;

stipular glands present;

blade threadlike to linear, 10–25 × 1–1.5(–2) mm, base flat, not clasping, margins eglandular.

alternate;

stipular glands present at proximal nodes, usually absent distally;

blade threadlike to linear, 15–20(–30) × 1–1.5 mm, base flat, not clasping, margins without stalked glands.

cymes monochasial, dense, sparingly branched, internodes short and flowers condensed or internodes long near base and flowers condensed at apices;

bract margins eglandular.

cymes dichasial, open, internodes long, flowers widely scattered;

bract margins without prominent glands.

0.5–2(–5) mm, to 10 mm in fruit, ascending, not bent at apex.

(2–)10–12 mm, to 40 mm in fruit, spreading at 45–90° angle, not or only slightly bent at apex.

sepals erect, lanceolate to narrowly ovate, 3.5–4 mm, subequal, margins minutely glandular-toothed, surfaces glabrous;

petals widely spreading, white or partly pink, irregularly veined or flushed with pink or rose pink, obovate, (4–)6–8(–12) mm, apex obtuse, slightly erose;

cup white, rim with petal attachments set in deep notches;

stamens exserted;

filaments (4–)5–7(–8) mm;

anthers white to rose, dehisced anthers 2(–3) mm;

ovary chambers 6;

styles 3, white, (4–)5–7(–10) mm, exserted.

sepals all or outer 2 spreading, not reflexed at tip, lanceolate, 1.5–2(–3) mm, ± equal, marginal glands minute or absent, surfaces glabrous;

petals horizontally widely spreading, bright yellow fading white, tinged with orange or red along veins, oblanceolate to obovate, (2–)3–4 mm, apex acute or apiculate;

cup yellow, rim lobed between filaments and petal attachments;

stamens exserted;

filaments 2–3(–3.5) mm;

anthers yellow, dehisced anthers 1.2–1.5 mm;

ovary chambers 4;

styles 2(–3), yellow, 2–3.5 mm, exserted.

= 36.

= 34.