Galinsoga

Ruiz & Pavón

Fl. Peruv. Prodr., 110, plate 24. 1794.

Common names: Quickweed
Etymology: For Mariano Martínez de Galinsoga, 1766–1797, court physician and director of the Botanic Garden, Madrid
Treatment appears in FNA Volume 21. Treatment on page 180. Mentioned on page 6, 177, 181.
 TaxonIllustrator 
FNA21 P28 Tetragonotheca helian.jpegTetragonotheca helianthoides
Tridax procumbens
Galinsoga quadriradiata
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Annuals, 2–62 cm. Stems erect. Leaves cauline; opposite; petiolate; blades (3-nerved) lanceolate to broadly ovate, margins entire or serrulate to serrate, faces glabrate to densely pilose. Heads radiate or discoid, in ± cymiform arrays. Involucres hemispheric to campanulate, 2.5–6 mm diam. Phyllaries persistent or falling, 6–9 [–16] in 2 [–3] series (elliptic, lanceovate, oblong, or ovate, outer shorter, herbaceous or scarious, margins entire or minutely laciniate). Receptacles conic, paleate (paleae persistent or falling, scarious, proximal broadly elliptic to obovate, often connate at bases or nearly to apices, united in groups of 2–3 to adjacent proximal phyllary, each complex often enclosing and shed with a ray cypsela; distal persistent or falling, lanceolate to obovate, entire or 2-lobed or 3-lobed, convex to conduplicate). Ray-florets [0–] (3–) 5 (–8) [–15], pistillate, fertile; corollas white or dull white to pinkish [purplish] (tubes pilose, laminae quadrate-obovate to oblong, lobes 0–3). Disc-florets 5–50 [–150], bisexual, fertile; corollas yellow, tubes (pilose) shorter than cylindric throats, lobes 5, deltate (anthers yellow; style-branch apices acute). Cypselae obconic to obpyramidal, glabrous or strigose (rays often shed with subtending phyllary plus 2–3 adjacent paleae); pappi 0, or persistent, of 5–20, white or gray, fimbriate, sometimes aristate scales. x = 8.

Distribution

North America, Mexico, West Indies, Bermuda, Central America, South America, in Europe, Asia, Africa, Atlantic Islands, Pacific Islands, Australia

Discussion

Species 15–33+ (2 in the flora).

Galinsoga is closely related to Sabazia Cassini of Mexico and South America and to at least some members of Alloispermum Willdenow, primarily from South America. Galinsoga might best be treated as a single larger genus including Alloispermum and Sabazia (J. M. Canne 1978; J. L. Panero et al. 1999).

Key

1 Phyllaries persistent; inner paleae 3-lobed, lobes 1/3+ total lengths, acute; disc pappi 0, or of 15–20 often gray, sometimes white, linear, fimbriate, obtuse scales 0.5–2 mm Galinsoga parviflora
1 Phyllaries falling; inner paleae entire or 2- or 3-lobed, lobes to 1/3 total lengths, blunt; disc pappi 0, or of 1–5 or 14–20 white, lanceolate to oblanceolate, fimbriate, sometimes aristate, scales Galinsoga quadriradiata
... more about "Galinsoga"
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Judith M. Canne-Hilliker +
Ruiz & Pavón +
decurrent +
compound +  and simple +
lanceolate;broadly ovate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Quickweed +
yellow +, dull white +  and pinkish +
strigose +  and glabrous +
obconic +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
North America +, Mexico +, West Indies +, Bermuda +, Central America +, South America +, in Europe +, Asia +, Africa +, Atlantic Islands +, Pacific Islands +  and Australia +
For Mariano Martínez de Galinsoga, 1766–1797, court physician and director of the Botanic Garden, Madrid +
glabrate +  and densely pilose +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
in loose to tight +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
hemispheric;campanulate +
deltate +
serrate +, serrulate +  and entire +
2-carpellate +
entire +  and erose +
gray +  and white +
persistent +
fimbriate +
unequal +  and subequal +
Fl. Peruv. Prodr., +
bearing subulate enations +, hairy +  and bristly +
canne1977a +  and canne1978a +
5 +  and 20 +
aristate +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Galinsoga +
Asteraceae (tribe Heliantheae) subtribe Galinsoginae +
cylindric +
toothed +  and entire +
2 cm20 mm <br />0.02 m <br /> (62 cm620 mm <br />0.62 m <br />) +
150 cm1,500 mm <br />1.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +
shrub +  and subshrub +