Flora of North America species comparison

simple or branched, 7–100 cm;

branches ascending, terete, ridged, scabridulous proximally, angular, ridged, scabrous distally, sometimes sparingly.

simple or branched, 7–120 cm;

branches ascending, spreading, or arching, quadrangular-ridged to winged distally, glabrate or scabridulous to sparsely scabrous, especially on angles or also on faces near nodes.

ascending;

blade linear to filiform, 15–50(–60) x 0.4–1.5(–2) mm, margins entire, siliceous, adaxial surface scabrous;

axillary fascicles well developed, shorter to longer than subtending leaves.

spreading to ascending;

blade narrowly linear to linear or linear-lanceolate, 7.5–50 x 0.5–4(–5) mm, not fleshy, margins entire, abaxial midvein sometimes scabrous, adaxial surface scabrous;

axillary fascicles absent or shorter than subtending leaves.

racemes, flowers 1 or 2 per node;

bracts longer than pedicels.

racemes, short to elongate, flowers 1 or 2 per node;

bracts longer than pedicels.

ascending-spreading, 4–20 mm, glabrous or proximally scabridulous.

spreading-ascending, 1–5(–6) mm, glabrous, rarely scabrous.

calyx campanulate, tube (3–)3.5–5 mm, glabrous, lobes triangular-lanceolate, (1.5–)2–4 mm;

corolla pink, with 2 yellow lines and dark red spots in abaxial throat, 15–28 mm, throat pilose externally and glabrous within across bases and sinus of adaxial lobes, lobes: abaxial projecting to spreading, adaxial spreading to erect, 3–7 mm, glabrous externally;

proximal anthers parallel to filaments, distal perpendicular to filaments, pollen sacs 1.8–3 mm;

style included or exserted, 8–15 mm.

calyx tubular-campanulate to hemispheric, tube (2–)3–5 mm, glabrous, rarely scabrous on major veins, lobes triangular, lanceolate, or triangular-subulate, not keeled, 0.8–3(–5) mm;

corolla pink to rosy pink, with 2 yellow lines and red spots in abaxial throat or these pale or absent, 9–36 mm, throat pilose externally and villous within across bases and sinus of adaxial lobes, lobes: abaxial spreading to reflexed or projected to somewhat spreading (small-flowered plants), adaxial erect to reflexed, 2.5–11 mm, pilose externally;

proximal anthers parallel to filaments, distal oblique or perpendicular to filaments (parallel in small-flowered plants), pollen sacs 0.9–4.5 mm;

style included or exserted, 6.5–21 mm.

ovoid-oblong, 6.5–11 mm.

globular, 4–6(–7) mm.

dark brown, 0.9–2 mm.

dark brown, 0.7–1.4 mm.

= 26.

= 28.