Flora of North America species comparison

internodes (4-) or 6-lined at first, then terete.

internodes terete (not lined) or 2-, 4-, or 6-lined at first (lines usually raised), then sometimes becoming angled, terete, or winged;

bark smooth or striate, sometimes corky, punctiform.

blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched.

narrowly pyramidal, 1–3-flowered, with 1–3(–5)-flowered dichasia from to 5 proximal nodes, without additional flowering branches;

pedicels 0.5 mm.

terminal, cymose, 2+-flowered, or flowers solitary, branching stellate [cupulate];

sepals persistent or deciduous, (3–)4–5, distinct or ± connate, margins sometimes glandular-ciliate;

petals persistent or deciduous, (3–)4–5[–6], contorted, yellow to orange, sometimes red-tinged;

stamens persistent or deciduous, (5–)10–300(–650), in continuous or interrupted ring or in (3–)4–5 fascicles, fascicles distinct or connate, each with 1–60+ stamens;

filaments distinct or basally connate;

anthers yellow to orange, oblong to ellipsoid, almost isodiametric, sometimes with amber or black gland on connective;

staminode fascicles 0 [3];

ovary 2–5-merous;

placentation axile to parietal;

ovules 2+ on each placenta;

styles distinct or ± connate basally, spreading to ± appressed.

12–14 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–7 × 0.5–0.8 mm;

petals 5, golden yellow, oblanceolate-oblong, 5–7.5 mm;

stamens deciduous, 100;

ovary 3-merous.

ovoid, 3–4 × 2–2.5 mm.

2–5-valved, sometimes with glandular vittae or vesicles.

carinate, 0.7 mm;

testa not seen.

narrowly cylindric to ellipsoid, sometimes carinate;

testa foveolate or reticulate to scalariform [papillose].

= 12, 9–7, 6 (dihaploid).