thorns, sometimes unarmed; bud-scales absent. Leaves deciduous, alternate, mostly borne on short-shoots and usually fascicled; blade not gland-dotted; pinnately
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cauline; opposite; petiolate (petioles usually winged) or sessile; blades deltate, lance-elliptic, lanceolate, lance-linear, linear, linear-oblong, ovate
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few scales at base, with single vascular-bundle. Blade linear to ovate-deltate, 1–4-pinnate proximally, leathery or rarely somewhat herbaceous, abaxially
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and sterile, sometimes neuter (sometimes with 4–5 staminodes); corollas mostly white, yellow, orange, blue, red, or purple (rarely with 2 teeth opposite
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subtended by persistent bracts. Bracts ovate, lanceolate, linear, subulate, deltate, or broadly triangular (in A. acanthochiton), or proximal bracts modified
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Leaves basal, basal and cauline, or cauline; petiolate or sessile; blades mostly elliptic, lanceolate, oblanceolate, oblong, or spatulate, margins entire
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papposa, sometimes on outer in A. rothrockii). x = 9. Mostly Northern Hemisphere (North America), Mostly Northern Hemisphere (Eurasia), some in South America
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erect, branched distally or ± throughout. Leaves mostly basal, basal and cauline, or mostly cauline; mostly opposite (distal rarely alternate); blades usually
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to petiole, lanceolate, margins entire; petiole present; blade shallowly deltate to widely ovate or widely depressed ovate, 1–6 cm, thin to thick, sometimes
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cylindric throats, lobes 5, ± deltate (anther appendages deltate, widest at bases, glandular; style-branch appendages deltate). Cypselae ± obcompressed, 3–4-angled
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in the flora). In the key and descriptions that follow, for species with mostly prostrate stems, the side of the stem toward the ground is called the lower
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cauline (gradually or abruptly reduced distally); alternate; petiolate (mostly basal) or sessile; blades pinnately nerved, elliptic, lanceolate, linear
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sometimes stipitate-glandular, rarely eglandular, often resinous. Leaves mostly cauline; alternate; sessile; blades 1-nerved, linear to oblanceolate or
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perennials, mostly 20–120 cm. Stems often decumbent (rooting at proximal nodes), sparsely to densely branched. Leaves cauline; all or mostly opposite; petiolate;
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257, 295, 296, 298, 300, 302, 304. Annuals, 5–250 cm. Stems erect. Leaves mostly cauline (at flowering) proximal opposite (often in rosettes), distal alternate;
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page 178. Mentioned on page 176. Perennials, mostly 30–120 cm. Stems erect. Leaves basal and/or cauline; mostly opposite; petiolate, subpetiolate, or sessile
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hemispheric or broader, 6–20 mm diam. Phyllaries persistent, mostly 8–16 in 2–3 series (mostly ovate to lanceolate, subequal to unequal, bases pallid, with
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256, 277, 280, 291. Annuals, 10–120 cm. Stems ± erect to prostrate. Leaves mostly cauline (at flowering); proximal opposite (often in winter–spring rosettes)
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Stems ± erect. Leaves mostly cauline; proximal opposite (forming winter–spring rosettes, sometimes present at flowering), mostly alternate; sessile; blades
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cupulate, campanulate, salverform, or funnelform; stamens (2–) 3–5, with 4 mostly connate in pairs, appearing as only (1–) 3 stamens; anthers connate or distinct
19 KB (877 words) - 11:15, 30 July 2020