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Species
Galinsoga quadriradiata Ruiz & Pav.
IUCN
NCBI
EOL Text
Isotype for Ageratum perplexans M.F. Johnson
Catalog Number: US 76498
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Card file verified by examination of original publication
Preparation: Pressed specimen
Collector(s): M. Bang
Year Collected: 1890
Locality: Yungas., La Paz, Bolivia, South America
- Isotype: Johnson, M. F. 1971. Ann. Missouri Bot. Gard. 58: 80.
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Rights holder/Author | This image was obtained from the Smithsonian Institution. Unless otherwise noted, this image or its contents may be protected by international copyright laws. |
Source | http://collections.mnh.si.edu/search/botany/?irn=2148394 |
Type fragment for Galinsoga humboldtii Hieron.
Catalog Number: US 1059392
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): F. W. Humboldt & A. J. A. Bonpland
Locality: Colombia / Ecuador, South America
- Type fragment: Hieronymus, G. H. 1901. Bot. Jahrb. Syst. 28: 618.
License | http://creativecommons.org/licenses/by/3.0/ |
Rights holder/Author | This image was obtained from the Smithsonian Institution. Unless otherwise noted, this image or its contents may be protected by international copyright laws. |
Source | http://collections.mnh.si.edu/search/botany/?irn=2121042 |
This little weed can be identified by the tiny ray florets of the flowerheads there are only about 5 of these, far fewer in number than the tiny disk florets in the center of the flowerhead. Aside from 'Peruvian Daisy,' other common names for this species include 'Shaggy Soldiers' and 'Common Quickweed,' and Galinsoga ciliata is a scientific synonym by which this species is occasionally referred. There is another weedy species in this genus that is less common in Illinois this is Galinsoga parviflora (Lesser Peruvian Daisy), which is also native to Central and South America. These two species are very similar to each other in appearance and they prefer similar disturbed habitats. To distinguish them, the achenes of their ray florets should be examined
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
Source | http://www.illinoiswildflowers.info/weeds/plants/peru_daisy.htm |
Isotype for Galinsoga bicolorata H. St. John & D. White
Catalog Number: US 233169
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): E. W. Nelson
Year Collected: 1895
Locality: Tumbala., Chiapas, Mexico, North America
Elevation (m): 1219 to 1676
- Isotype: St. John, H. & White, D. 1920. Rhodora. 22: 99.
License | http://creativecommons.org/licenses/by/3.0/ |
Rights holder/Author | This image was obtained from the Smithsonian Institution. Unless otherwise noted, this image or its contents may be protected by international copyright laws. |
Source | http://collections.mnh.si.edu/search/botany/?irn=2125914 |
Slender annual herb, up to 30 cm. Stems densely covered in long, spreading, often glandular hairs. Leaves opposite with long glandular hairs, particularly on the underside; margin crenate-dentate to subentire. Capitula on slender peduncles, disk florets greenish to yellow; ray florets white, three-lobed.
Peruvian Daisy is occasional to locally common throughout Illinois; it is especially common in and around cities in the northern two-thirds of the state. Peruvian Daisy is native to both Central and South America; it has spread to North America, Eurasia, Africa, and some Pacific Islands (including Hawaii). Habitats include abandoned fields, roadsides, gardens, edges of yards, vacant lots, areas along buildings, and waste areas (especially urban). Disturbed areas that are left unmowed or are sparingly mowed provide ideal habitat.
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
Source | http://www.illinoiswildflowers.info/weeds/plants/peru_daisy.htm |
This introduced wildflower is a summer annual about ½2' tall that is sparingly to abundantly branched. The stems have spreading hairs; pairs of opposite leaves occur along these stems. The blades of the leaves are up to 3" long and 2" across; they are medium to dark green, dentate along their margins, and lanceolate to oval-ovate in shape. The upper surfaces of the blades are sparsely to moderately covered with appressed hairs. The slender petioles are up to 1½" long and hairy. Both terminal and axillary cymes of flowerheads are produced from the stems. These small cymes are sparingly branched. Individual flowerheads are about ¼" in across; each flowerhead has 4-6 white ray florets along its margins and numerous yellow disk florets in its center. The ray florets are very short and 3-toothed at their tips. The base of each flowerhead is surrounded by scale-like bracts that are green and oval-ovate in shape; there are approximately 2 outer bracts and several inner bracts per flowerhead. The blooming period occurs during the summer and fall and up to 3 generations of plants can be produced before winter. Both the disk and ray florets are fertile, producing oblanceoloid achenes. At the apex of each achene (whether from a disk or ray floret), there is a pappus of several membranous scales that are usually shorter than the achene. These scales spread outward as the achenes mature and assist in their distribution by wind and water. The scales of the ray florets are a little smaller than those of the disk florets, but nonetheless well-developed. The root system is very fibrous. Peruvian Daisy spreads by reseeding itself. It often forms colonies.
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
Source | http://www.illinoiswildflowers.info/weeds/plants/peru_daisy.htm |
Little information is available about floral-faunal relationships. The florets can be cross-pollinated by insects, otherwise they are self-fertile.
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
Source | http://www.illinoiswildflowers.info/weeds/plants/peru_daisy.htm |
"Notes: Western Ghats & Eastern Ghats, High Altitude, Naturalized, Native of Tropical America"