Fruct. Sem. Pl. 2: 456, plate 171, fig. 7. 1791

Etymology: Etymology not clear perhaps alluding to clustering of heads
Treatment appears in FNA Volume 21. Treatment on page 127. Mentioned on page 65, 67.
Annuals, 10–80+ cm. Stems erect or ascending, branched from bases or ± throughout. Leaves cauline; opposite; petiolate; blades (usually 3-nerved) ovate to elliptic, bases cuneate to rounded, margins toothed, faces ± scabrous. Heads radiate, (sessile or subsessile) in axillary glomerules or borne singly. Involucres cylindric to campanulate, 3–6 mm diam. Phyllaries persistent, 2–5+ in 1(–2) series (lanceolate, herbaceous to chartaceous). Receptacles convex, paleate (paleae lance-linear, scarious, flat or weakly cupped at bases). Ray florets 2–9+ (in 1–2 series), pistillate, fertile; corollas yellowish. Disc florets 4–12+, bisexual, fertile; corollas yellowish, tubes about equaling slightly ampliate, cylindric throats, lobes 4, rounded-deltate. Cypselae dimorphic, strongly obcompressed or flattened, narrowly oval and winged (ray, wings laciniate) or linear-cuneate and not winged (disc); pappi persistent, of 2 triangular scales (ray) or 2–3 subulate scales or awns (disc). x = 20?


Mexico, West Indies, Central America, South America, also introduced in Asia, Africa, Pacific Islands, Australia.


Species 1.

Selected References


Facts about "Synedrella"
AuthorJohn L. Strother +
AuthorityGaertner +
DistributionMexico +, West Indies +, Central America +, South America +, also introduced in Asia +, Africa +, Pacific Islands + and Australia. +
EtymologyEtymology not clear + and perhaps alluding to clustering of heads +
Illustration copyrightFlora of North America Association +
IllustratorBee F. Gunn +
Introducedtrue +
Publication titleFruct. Sem. Pl. +
Publication year1791 +
ReferenceNone +
Source xml grained fna xml/V19-20-21/V21 310.xml +
SynonymsUndefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae + and Undefined (tribe Undefined) subtribe Zinniinae +
Taxon familyAsteraceae +
Taxon nameSynedrella +
Taxon parentAsteraceae (tribe Heliantheae) subtribe Ecliptinae +
Taxon rankgenus +
VolumeVolume 21 +