cylindric to obconic or campanulate, 5–12 mm diam. Phyllaries persistent, (10–) 14–45 (–60) in 3–7 (–9) series, usually (4–) 5–6 (–16) -striate or nerved, linear
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slightly greenish; lodicules 2, broadly lanceolate, glabrous, lobed; functional anthers (1-2) 3, 0.1-5 mm; ovaries glabrous. Caryopses 1-4 mm, ellipsoidal, often
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beyond) anther sacs; ovary superior, proximal portion 3-locular, 3-lobed or 6-lobed, some axile, some parietal or a combination of both, distal portion
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Velascoa)]; sepals (3–) 4–5 (–6), distinct; petals (3–) 4–5 (–6), distinct, base often short-clawed; nectar disc absent or crenately lobed, fleshy or thin; stamens
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diam.; epicalyx bractlets (0–) 5; hypanthium patelliform to campanulate or cupulate to turbinate, 0.5–3 (–4) mm; sepals 5 (usually 4 in I. campestris),
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stipulate [estipulate], petiolate or sessile; blade unlobed or lobed. Inflorescences 1 (–4) [–5] -flowered, axillary from leaf-axils or scapose from rhizomes
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the Isoëtaceae. Ann. Missouri Bot. Gard. 9: 79--233. Reed, C. F. 1953. Index Isoëtales. Bol. Soc. Brot. 27: 5--72. Tryon, R. M. and A. F. Tryon. 1982.
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Thalictrum sect. Thalictrum Linnaeus Sp. Pl. 1: 545. 175. , Gen. Pl. ed. 5, 242. 1754. Marilyn M. Park, Dennis Festerling Jr. Common names: Meadow-rue pigamon
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simple; stipules absent; petiole present or absent; blade sometimes palmately lobed, margins entire, serrate, serrulate, dentate, denticulate, or crenate; venation
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to pink, light-brown, or white. Corollas: staminate 3–4.5 mm; pistillate 5–6 mm. Cypselae 2–2.5 mm, pubescent and papillate; pappi: staminate 6–7 mm (capillary);
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symmetric; stipitate-glands absent (except in Vancouveria); sepaloid bracteoles 0-9; perianth sometimes absent (Achlys), more frequently present, 2-merous or 3-merous
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Disc-florets (5–) 12–60 (–150+), bisexual, fertile; corollas usually yellow to orange, sometimes whitish [purplish], tubes shorter than throats, lobes (3–) 5, ± deltate
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×arizonica, Agave ×glomeruliflora Linnaeus Sp. Pl. 1: 323. 1753. , Gen. Pl. ed. 5, 150. 1754. James L. Reveal, Wendy C. Hodgson Common names: Century plant Etymology:
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on page 254. Mentioned on page 3, 5, 6, 76, 255, 257, 300, 301, 306. Annuals, perennials, subshrubs, or shrubs, (0.5–) 1–250 cm. Leaves mostly basal, or
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ciliolate; wings persistent, 1–9 mm, glabrous (pubescent in P. alba), margins entire, sometimes ciliolate; keel crested, crest 2-lobed, often fimbriate (lobes
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Symposium on the Biology of Artemisia and Chrysothamnus, Provo, Utah, July 9–13, 1984. Ogden. Pp. 253–264. Shultz, L. M. 1986. Taxonomic and geographic
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oblong or lanceolate to obovate, oblanceolate, or spatulate (often pinnately lobed), ultimate margins entire or ± dentate (faces usually glabrous, sometimes
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fruit; sepals 5, calyx symmetric, tubular, lobes triangular to deltate, rarely reduced or barely evident, midvein angled or wing-angled; petals 5, corolla marcescent
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heteromorphic, 5 outermost dorsiventrally flattened, linear or elliptic, not petaloid, inner filiform, usually unlobed, rarely distally 2-lobed; ovules (and
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diam.; epicalyx bractlets, if present, 5 (10 in G. glaciale); hypanthium saucer-shaped to cupshaped, 2–6 mm; sepals 5 (–10 in G. glaciale), erect to erect-spreading
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