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clones. Stems 1–25 (–50+), erect, proximally glabrous or sparsely to moderately canescent-villous, distally densely so. Leaves: basal 0; proximal cauline

sense) would be glabrous and eglandular. Petiole margins are eciliate or sparsely ciliate unless otherwise indicated. Leaf bases of most erigerons are broadened

on page 82, 93, 94, 145, 150. Herbs. Stems glabrous, retrorsely hairy, canescent, glandular, or glandular-pubescent, rarely glutinous, glaucous or not.

sometimes dark-translucent), faces glabrous or strigillose, eglandular (sparsely stipitate-glandular in S. novae-angliae); pappi persistent, of (20–) 25–40

distinct, brown, linear-subulate, thin, 0.3–0.8 mm, canescent; petiole 0.4–1.2 mm, moderately to densely canescent; blade ovate to lanceolate, 6–20 × 3–8 mm, base

abaxial surface sericeous, pilose, villous, or with curled hairs on veins, areoles canescent or glabrous, adaxial sparsely hairy, sometimes glabrate. Flowers

County, Nevada) Tonestus 13 Leaf faces glabrous or canescent, ± puberulent, hispidulous, tomentose, or villous, and/or sometimes ± stipitate-glandular or gland-dotted;

inconspicuously pitted-reticulate. Euphorbia hyssopifolia 53 Stems sparsely to moderately pilose to villous or with short, incurved hairs, pubescence often concentrated

faces glabrous or sparsely hairy, especially along veins abaxially, or densely hairy. Heads (3–) 20–100 (–300+). Peduncles 1–10 mm, moderately to densely canescent;

hairs/mm2), abaxially moderately to densely canescent (indument often dense over entire plant). Phyllaries sparsely piloso-villous, sometimes more densely

Helianthus exilis 12 Phyllaries densely white-canescent Helianthus niveus 12 Phyllaries glabrous or sparsely hispid to hispidulous > 13 13 Leaf blades (at

teeth and lobes bristly-tipped, faces green and glabrous or densely gray-canescent, usually eglandular. Heads discoid, borne singly, terminal and in distal

erect (often stout, light to dark-brown), sparsely to densely scabroso-hirsute to cinereo-puberulent, or villous distally. Leaves (light to dark green) thick

surface sericeous, villous, or hirsute on veins, areoles canescent, rarely glabrous, adaxial moderately sericeous, hirsute, or villous. Flowers 1–3 (–7)

cm; caudices thick, woody, roots thick. Stems 1–5+, sparsely to moderately short strigose or villous. Leaves: basal withering by flowering, petiolate, smaller

× 15–50 mm, margins serrate or crenate, apices acute, sparsely to moderately soft hispido-villous, more densely so on abaxial nerves; rosettes on rhizome

caudices branching. Stems 1 (–5), erect, simple, glabrous or moderately to densely hispido-villous, sometimes hairs appressed. Leaves: basal and proximal cauline

0.4–1 m, branches slender, indument white or grayish, sparse to dense, shaggy-tomentose, canescent, hairs mostly stellate, stalked, 10–30-armed. Leaf-blades

stamens and carpels, and petals 7–12 mm) > 63 51 Ovaries sparsely hairy or glabrous proximally, villous distally > 52 51 Ovaries usually densely hairy > 53

corymbiform arrays, sometimes borne singly. Phyllaries to 1.5 cm (faces sparsely to moderately hairy and glanddotted). Receptacles hemispheric to ovoid; paleae