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.

persistent, whorled (usually in 4s), distal sometimes ± opposite;

stipular glands absent;

blade ovate or orbiculate, 4–8 × 3–6 mm, base keeled, clasping, margins minutely stipitate-glandular.

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

bract margins without prominent glands.

cymes dichasial and open proximally, monochasial and dense near tips, few-branched, internodes long proximally, short near apices, flowers congested;

bract margins stipitate-glandular.

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

0.5–2(–10) mm, scarcely longer in fruit, little spreading, 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 (even in bud), ovate to broadly lanceolate, 2.5–4 mm, usually equal, marginal glands inconspicuous, surfaces glabrous or with a few stiff, white hairs;

petals widely spreading, white or lavendar to pink, sometimes streaked with deeper pink or rose purple, obovate, 3–5(–6) mm, apex notched;

cup white, rim lobed between filaments and petal attachment;

stamens exserted;

filaments 2.5–3(–3.5) mm;

anthers usually white, sometimes purple, white-margined, dehisced anthers (0.8–)1–1.5(–2) mm;

ovary chambers 6;

styles 3, white, (2–)2.5–3(–3.5) mm, exserted.

= 36.