Flora of North America species comparison

erect to spreading-ascending, leafybased, trigonous or compressed, ribbed.

erect to spreading, leafybased;

scapes nearly filiform, nearly trigonous, few ribbed.

exceeded by scape;

blades narrowly linear to filiform, 0.2–2 mm wide, apex tapering, trigonous.

spreading to erect, exceeded by scape;

blades filiform to linear, proximally flat or involute, becoming involute, 0.4–2 mm wide, apex tapering, trigonous.

terminal, solitary, headlike, dense, white, leafyinvolucrate, hemispheric to globose, 0.5–1.5 cm wide;

involucral bracts (0–)1–4, ascending to recurved, green, (0.7–)2–5(–6) cm × 0.2–2 mm.

terminal, solitary, headlike, dense, white, leafyinvolucrate, 0.5–1 cm wide;

involucral bracts 3–6, spreading to recurved, whitebased, greentipped, narrowly linear, longest bract elongatesubulate, 4–8 cm × 2–5 mm.

white, ovoid, 5–7 mm;

fertile scales several, boat-shaped, 2.5–3.5 mm, keel curved, not sharp.

white, ovoid, 4–6 mm;

scales several, boatshaped, basal ones with ciliolate keel, fertile ones 3–3.8 mm.

perianth absent.

perianth absent.

0.8–1 mm;

body yellow to near black, broadly pyriform-obovoid, tumidly lenticular, 0.5–0.8 × 0.5–0.8 mm, margin narrow, flowing into tubercle;

surfaces transversely sharply wavyrugose, ridges bordered by rows of fine, linear, vertical lattices;

tubercle depressedtriangular, lunate-based, shortbeaked 0.2(–0.3) mm, gray-crustaceous.

1–1.2 mm;

body yellow to black, nearly orbicular, tumidly lenticular, 0.8–1 × 0.6–0.7(–1) mm;

surface lattices shortlinear, vertical in fine undulating rows, with ends raised to rounded, transverse rugulosities;

tubercle lowtriangular, lunate, 0.2–0.3 mm, apex acute, blunt or apiculate.