Flora of North America species comparison

alternate;

stipular glands very inconspicuous, present at proximal nodes, absent distally;

blade linear or narrowly oblong, 10–13(–20) × 2–2.5 mm, base flat, not clasping, margins without stalked glands.

alternate;

stipular glands present on proximal nodes;

blade threadlike to linear, 10–20(–30) × 1–1.5 mm, base flat, not clasping, margins eglandular.

cymes monochasial (scorpioid or helicoid), open, branches unequal (main axis obvious), internodes long, flowers widely scattered;

bract margins without prominent glands.

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

bract margins eglandular.

5–25 mm, scarcely longer in fruit, spreading at angles 70–80(–90)°, scarcely bent at apex.

(2–)5–8(–15) mm, 20+ mm in fruit, spreading at 45–90° angle, not reflexed or bent at apex.

sepals erect or reflexed at tip, lanceolate, 1.5–2.5 mm, usually equal, sometimes one larger, marginal glands absent or minute, surfaces glabrous;

petals not or slightly spreading at anthesis, yellow, often with reddish or orange streak on midvein, oblanceolate, sometimes obovate, 0.5–2.5(–4) mm, apex notched or erose;

cup yellow, rim with petal attachment protruding prominently in sinus or strongly indented;

stamens included;

filaments 1–2 mm;

anthers yellow, dehisced anthers 0.5–0.8(–1.2) mm;

ovary chambers 6;

styles 3, yellow, 0.5–1(–1.8) mm, included.

sepals spreading, lanceolate, 2–3 mm, ± equal, marginal glands minute or absent, surfaces glabrous;

petals horizontally spreading, white or light pink or pink to deep purplish pink and streaked with light or deeper pink, veins white, oblanceolate to obovate or nearly oval, 2.5–3(–4) mm, apex notched;

cup white, rim lobed between petal attachment and filaments;

stamens exserted;

filaments 2.5–3 mm;

anthers white to deep purplish pink bordered with white, dehisced anthers 1.2–2 mm;

ovary chambers 4;

styles 2, white, 2.5–4 mm, exserted.

= 36.