Flora of North America species comparison

alternate;

stipular glands absent or minute;

blade linear or narrowly oblong, 10–35 × 0.5–2(–2.5) mm, base flat, not clasping, margins without stalked glands.

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 (helicoid), open, internodes long, flowers widely scattered;

bract margins without prominent glands.

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

bract margins without prominent glands.

5–15(–25) mm, 5–25 mm in fruit, pendent in bud, deflexed at 90° angle, slightly 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, not reflexed at tip, ovate, 1.5–2.5(–3.5) mm, equal, margins minutely gland-toothed, surfaces glabrous;

petals widely spreading to reflexed, white or pale pink, usually darker-veined, obovate, 4–7 mm, apex obtuse;

cup white, rim petal attachments in indentations;

stamens exserted;

filaments (3–)4–5(–7) mm;

anthers pink to red-purple, white-margined, dehisced anthers 1.2–2 mm;

ovary chambers 6;

styles 3, white, 3.5–7 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.