Flora of North America species comparison

internodes 6-lined at first, becoming 4-lined, then terete.

internodes 4-lined.

blades linear-subulate, 4–11 × 0.4–0.8 mm, base articulated, persistent, parallel or slightly expanded, margins revolute, apex rounded with ± prominent hydathode to long-acuminate, midrib unbranched.

appressed, sessile;

blade linear-subulate, (1–)2.5–4 × 0.2–0.3 mm, subcoriaceous, margins incurved, apex acute, basal vein 1, midrib unbranched.

± narrowly cylindric, 1–7-flowered, with 1(–3)-flowered dichasia from to 4 proximal nodes, rarely with 1 pair of flowering branches;

flowers sessile or nearly so.

subcorymbiform, to 13-flowered, branching mostly dichasial.

10–14 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, 2–4 × 0.4–0.5 mm;

petals 5, bright yellow, oblanceolate-oblong to obovate, 5–10 mm;

stamens deciduous, 50–90;

ovary 3-merous.

3–4 mm diam.;

sepals ovate to elliptic or narrowly oblong, unequal, 1.5–2 × 0.6–1 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to subacute;

petals yellow, obovate-oblong, 3.5–5 mm;

stamens 20–25, irregularly arranged;

styles 1.5–2 mm;

stigmas capitate.

narrowly (sub-)cylindric, (4–)5.7–9.5 × 1.5–2 mm.

narrowly ovoid-conic, subrostrate, 3.5–6 × 1–1.5 mm.

scarcely carinate, 0.5 mm;

testa coarsely reticulate.

0.5–0.6 mm;

testa scalariform-reticulate.

= 18.

= 12.