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.

opposite or proximal whorled;

stipular glands absent;

blade linear to lanceolate, 5–15(–20) × 1.5–2.5 mm, base keeled, clasping, margins with stalked glands on teeth in 1–2 rows.

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

bract margins without prominent glands.

cymes monochasial to dichasial (scorpioid or helicoid), open, internodes long, flowers widely scattered along thin branchlets;

bract margins with stalked glands.

5–15(–25) mm, 5–25 mm in fruit, pendent in bud, deflexed at 90° angle, slightly bent at apex.

(3–)5–10(–15) mm, to 25 mm in fruit, spreading at 45–90° angle, not 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 erect, tips spreading, lanceolate, 2–3 mm, subequal, marginal glands few or absent, surfaces glabrous;

petals horizontally spreading, yellow, often veined or tinged orange, fading white, oblanceolate, 3–4(–5) mm, apex notched;

cup yellow, rim lobed between filaments and petal attachments;

stamens exserted;

filaments 2.5–3.5(–4) mm;

anthers yellow, dehisced anthers 1.2–1.5 mm;

ovary chambers 6;

styles 3, yellow, 2.5–3(–4) mm, exserted.

= 36.

= 36.