Flora of North America species comparison

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

internodes sometimes 4-lined at first, soon 2-winged, not terete.

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

blades linear, 6–12 × 0.5–0.7 mm, base articulated deciduous with leaf, cf.

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

pedicels 0.5 mm.

± narrowly cylindric, 3–15-flowered, with 3–5-flowered dichasia or flowering branches from to 10 proximal nodes.

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.

10–13 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear, unequal, 2.5–4.5 × 0.5–1 mm;

petals 5, bright yellow, obovate-spatulate, 5–8 mm;

stamens deciduous, 40–45;

ovary 3-merous;

styles longer than ovaries.

ovoid, 3–4 × 2–2.5 mm.

narrowly cylindric to narrowly ovoid-conic, 3.5–5 × 1.5–2 mm.

carinate, 0.7 mm;

testa not seen.

not carinate, 0.4–0.6 mm;

testa finely reticulate.

. H. tenuifolium, parallel, margins revolute, apex rounded-apiculate, midrib unbranched.

= 18.