Flora of North America species comparison

spreading to erect, (much-branched);

young branches usually glandular-hairy, older branches glabrous or puberulent, (roughened peglike projections remaining after fall of leaves, exfoliating).

spreading, ± imbricate;

blade linear, 4–12 × 1–2 mm, margins densely glandular-serrulate, surfaces glabrous or glandular.

persistent, alternate;

petiole present;

blade coriaceous, margins entire, serrulate, or glandular-serrulate, (appearing revolute, abaxial surface less than 1/3 visible).

corymbiform, 1–16-flowered.

terminal, umbellate, corymbiform, or spikelike clusters, 2–30-flowered, sometimes flowers solitary;

perulae absent.

10–35 mm, densely stipitate-glandular;

bracteoles 2.

often nodding;

sepals ovate to lanceolate, 3–4 mm, margins not ciliate, densely glandular abaxially;

corolla yellow or greenish yellow, urceolate, constricted at mouth, 5–8 mm, glandular, lobes reflexed, 1–2 mm;

stamens 9–10, included;

filaments 2.5–3 mm, hairy;

anthers 1–1.5 mm;

ovary ovoid, 2–2.5 mm (3.5 mm wide), glandular;

style included, 3–4.5 mm.

bisexual, radially symmetric, sepals 5, connate basally;

petals 5, connate for 1/2+ their lengths, corolla deciduous, urceolate, campanulate, or cylindric;

stamens (8–)10, included or exserted;

anthers not awned, dehiscent by terminal slits;

ovary 5-locular;

style included or exserted;

stigma capitate.

capsular, broadly ovoid to globose, dehiscence basipetally septicidal.

5-valved, globose, 2.5–4 mm, densely glandular.

100+, ellipsoid, narrowly winged, not tailed;

testa smooth.

= 12.

= 24.