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 minute or absent;

blade linear, 10–20 × 1–2 mm, base flat, not clasping, margins eglandular or minutely gland-toothed.

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

bract margins without prominent glands.

cymes usually monochasial (scorpioid), sometimes dichasial, open, internodes long, flowers widely scattered;

bract margins eglandular or minutely gland-toothed.

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

1–5(–8) mm, 5–10(–25) mm in fruit, straight in bud, spreading at 75–90° 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 erect, usually spreading at tip, lanceolate, 2–3 mm, equal, marginal glands small, surfaces glabrous or with hoary microscopic puberulence;

petals widely spreading, white or pink to lavendar-pink or rose pink, veins usually pink, usually obovate, sometimes oblanceolate, (3–)4–5(–6) mm, apex notched, sometimes deeply;

cup white, rim with petal attachment in shallow sinus;

stamens exserted;

filaments (2.5–)3–3.5(–4) mm;

anthers usually pink, sometimes deep rose, white-margined, dehisced anthers (0.8–)1.2–1.8(–2) mm;

ovary chambers 6;

styles 3, white, (2.5–)3–4(–5) mm, exserted.

= 36.

= 34.