Glebionis Cass. in G,-F. Cuvier, Dict. Sci. Nat., ed. 2.: 41. 1826; Shi et al., Fl. China @ eFloras.org 20-21: 771; Strother, Fl. North Amer. @ eFloras.org 19-21: 554.

Herbs, annual; stem usually 1, erect, usually branched distally, indumentum absent or of simple basifixed hairs. Leaves cauline, alternate, 1-3 pinnatifid or margin dentate, glabrous. Synflorescence cymose, lax +/- flat-topped or reduced to solitary terminal capitulum. Capitula pedunculate, heterogamous, radiate. Involucre cup-shaped, 15-25+ mm diameter. Phyllaries 25-60+, in 3-4 series, rigidly herbaceous, margins and apices scarious. Receptacle convex, epaleate. Ray florets: 10-21+, in one series, female, fertile. Corolla limb yellow or yellow and white, linear, oblong or ovate. Disc florets: Many, 60-150+, yellow, bisexual, fertile. Corolla funnelform or tubular, apex 5-lobed, tube gland-dotted. Anther bases obtuse; apical appendage ovate-elliptic. Style branches linear, apex truncate. Cypselae dimorphic: Ray achenes 3-angled, each angle +/- winged; corona absent; Disc achenes compressed-prismatic to columnar, adaxial, rarely abaxial angles +/- winged, faces ribbed, glabrous, sometimes gland-dotted between ribs; corona absent. Pappi absent in both ray and disc florets.

2 species

Glebionis coronaria (L.) Cass. ex Spach, Hist. Nat. Veg. 10: 181. 1841; Shi et al., Fl. China @ eFloras.org 20-21: 772; Strother, Fl. North Amer. @ eFloras.org 19-21: 555; Chrysanthemum coronarium L., Sp. Pl. 2: 890. 1753; C. roxburghii Desf., Tabl. Ecole Bot., ed. 2: 119. 1815; Glebionis roxburghii (Desf.) Tzvelev, Bot. Zhurn. (Moscow and Leningrad) 84(7): 117. 1999.

Herbs, annual, glabrous or so. Stems erect, up to 120 cm tall, unbranched or few branched above middle. Leaves alternate, sessile; leaf blade glabrous, narrowly elliptic or elliptic- lanceolate in outline, 8-10 cm x 3-5.5 cm, 1 or 2 (or 3)-pinnatisect or pinnatifid, primary segments 2-4 paired (occasionally lower primary segments undivided), ultimate lobes ovate or linear, margin dentate; upper stem leaves gradually smaller. Capitula ca. 5.5 cm across, radiate, terminal, solitary (or few, not forming conspicuous panicle); peduncle 15-20 cm long. Involucres cup-shaped, 1.5-3.0 cm diameter. Phyllaries in 4 series: inner ca. 1 cm long, apex widened, margin and apex scarious; outer 3 series have small phyllaries, ca. 4 mm. Receptacle convex and epaleate. Ray florets: 20-22+ in 1-2 series, female, fertile. Corolla tube 4 mm long; limb 1.5 cm long, apex 4-lobed, basal region yellow, distally pale cream. Ovary 2-3 mm long, triangular with hyaline wings at angles, style 3 mm long, bifid, branches slender, apex truncate. Pappus absent. Disc florets: Many, 60-150+, bisexual, fertile, ca. 6 mm long. Corolla with lower cylindric, ca. 3 mm long tube and upper funnelform throat, ca. 3 mm long, apex 5-lobed, lobes 1 mm long, triangular, bright yellow, recurved; tube gland- dotted. Anther bases obtuse, apical appendages ovate-elliptic. Ovary compressed-prismatic, 2-3 mm long, generally 1-ribbed; style ca. 3 mm long, bifid, branches slender, apex truncate. Ray cypselae triquetrous, 2.5-3 mm, angles +/- winged, faces obscurely nerved or ribbed. Disc cypselae +/- prismatic, +/- compressed, 2.5-3 mm, obscurely ribbed, sometimes with adaxial (rarely the abaxial) angles +/- winged. Pappus absent in all cypselae.

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