Plants subshrubs, spreading, densely branched, (0.5) 1–8 dm tall, 2–8 dm across; leaf blades linear-lanceolate to elliptic or spatulate, 0.4–1.2 (1.5) cm long, 0.2–0.8 cm wide, thinly tomentose abaxially; inflorescences 1–5 (8) cm long, 3–10 cm wide, the branches diffuse, with dichotomously arranged involucres, slender, sharply ridged and deeply grooved, minutely scabrellous, not spinose; involucres campanulate, 0.7–1.5 (2) mm long and wide; flowers 1.5–2.5 mm long, the perianth yellowish-white, the tepals glabrous. Continue reading →

Plants shrubs, spreading to rounded, sparsely to densely branched, 1–10 dm tall, 2–10 (12) dm across; leaf blades linear to linear-lanceolate or oblanceolate to elliptic or oblong, 0.5–1.2 (1.5) cm long, 0.1–0.6 cm wide, tomentose or glabrous abaxially; inflorescences (1) 3–20 cm long, (1) 3–25 cm wide, the branches diffuse with racemosely arranged involucres at tips, slender to stout, round, smooth, glabrous, scabrellous, or infrequently papillate-scabrous, infrequently somewhat spinose; involucres narrowly turbinate to campanulate, 0.9–1.8 mm long, 0.7–1.3 mm wide; flowers 1.5–4 mm long, the perianth white to yellowish-white or reddish, the tepals glabrous. Continue reading →

Plants shrubs, rounded, usually sparsely branched, 3–6 dm tall, 4–8 dm across; leaf blades oblanceolate, (0.5) 0.8–1.5 cm long, 0.2–0.5 cm wide, tomentose to floccose abaxially; inflorescences rather dense 5–12 cm long, 5–20 cm wide, the branches rather diffuse, with racemosely arranged involucres at tips, slender, round, smooth, floccose to thinly tomentose, not spinose; involucres campanulate, 1–1.5 (2) mm long, 1–1.5 mm wide; flowers 2–3 mm long, the perianth yellowish-white, the tepals glabrous.

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Plants shrubs, spreading to erect, sparsely branched, 4–8 dm tall, 6–10 dm across; leaf blades oblanceolate to spatulate, 0.5–1.5 cm long, 0.2–0.6 cm wide, mostly glabrous; inflorescences (5) 10–20 cm long, 5–8 cm wide, the branches open, with numerous racemosely arranged involucres, slender and whiplike, round, smooth, glabrous, not spinose; involucres campanulate, 1–1.5 mm long, 1.5–3 mm wide; flowers 2.5–3 mm long, the perianth white, the tepals glabrous.

Plants shrubs or subshrubs, spreading to rounded, usually sparsely branched, 3–7 dm tall, 5–12 (15) dm across; leaf blades oblanceolate to spatulate, 0.8–1.5 cm long, 0.4–0.8 cm wide, floccose or glabrous abaxially; inflorescences 3–15 (23) cm long, 5–20 cm wide, the branches usually diffuse with dichotomously arranged involucres, slender, round, smooth, glabrous, not spinose; involucres campanulate, 1–1.5 mm long, 1.5–3 mm wide; flowers 2.5–3 mm long, the perianth white, the tepals glabrous or rarely sparsely glandular (at least those of the inner whorl). Continue reading →