Argyranthemum

Webb ex Schultz-Bipontinus in P. B. Webb and S. Berthelot

in P. B. Webb and S. Berthelot, Hist. Nat. Îles Canaries 3(2,75): 245, 258. 1844

Common names: Marguerite
Etymology: Greek argyros, silver, and anthemon, flower allusion unclear
Treatment appears in FNA Volume 19. Treatment on page 552. Mentioned on page 30, 485, 487.
Subshrubs or shrubs, 10–80+[–150] cm. Stems usually 1, procumbent to erect, usually branched, glabrous [hairy]. Leaves mostly cauline; alternate; petiolate or sessile; blades ± obovate [oblong to lanceolate or linear] (bases sometimes ± clasping), [0](1–)2–3-pinnately lobed (lobes cuneate to linear), ultimate margins dentate [entire], faces glabrous [hairy]. Heads radiate [discoid], borne singly or in open, corymbiform arrays. Involucres hemispheric or broader, [6–]10–18[–22+] mm diam. Phyllaries persistent, 28–45+ in 3–4 series, distinct, oblanceolate or ovate to lance-deltate or lanceolate (not keeled abaxially), unequal, margins and apices (stramineous to brown) scarious (tips of inner often ± dilated). Receptacles convex to conic, epaleate. Ray florets 12–35+, pistillate, fertile; corollas usually white, sometimes yellow or pink, laminae ± ovate to linear. Disc florets [50–]80–150+, bisexual, fertile; corollas yellow [red, purple], tubes ± cylindric (not basally dilated, ± gland-dotted), throats campanulate, lobes 5, deltate (without resin sacs). Cypselae dimorphic: outer (ray) 3-angled, each angle usually ± winged (wings not spine-tipped); inner (disc) compressed-prismatic (± quadrate, sometimes 2 angles winged, wings not spine-tipped); all ± ribbed or nerved, faces usually glabrous, sometimes gland-dotted between ribs (pericarps without myxogenic cells or resin sacs; embryo sac development bisporic); pappi 0 (cypselar wall tissue sometimes produced as teeth, crowns, or oblique tubes similar in texture to cypselar wings). x = 9.

Distribution

Atlantic Ocean Islands (Macaronesia).

Discussion

Species 24 (1 in the flora).

Facts about "Argyranthemum"
AuthorJohn L. Strother +
AuthorityWebb ex Schultz-Bipontinus in P. B. Webb and S. Berthelot +
Common nameMarguerite +
DistributionAtlantic Ocean Islands (Macaronesia). +
EtymologyGreek argyros, silver, and anthemon, flower + and allusion unclear +
Illustration copyrightFlora of North America Association +
IllustratorYevonn Wilson-Ramsey +
Introducedtrue +
Publication titlein P. B. Webb and S. Berthelot, Hist. Nat. Îles Canaries +
Publication year1844 +
Referencehumphries1976a +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V19-20-21/V19 962.xml +
SynonymsCompositae +
Taxon familyAsteraceae +
Taxon nameArgyranthemum +
Taxon parentAsteraceae tribe Anthemideae +
Taxon rankgenus +
VolumeVolume 19 +