Synonyms:
Franseria confertiflora (A.P. de Candolle) Rydberg
Gaertneria tenuifolia (Gray) Kuntze
Ambrosia confertiflora is a perennial from a deep rhizomatous rootstock. The pubescent leaves are 2-3 times pinnately divided. The carpellate involucres have several curved spines. This plant is found in disturbed packed soil in Silver City.
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Ambrosia confertiflora, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
Ambrosia confertiflora, habit, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
Ambrosia confertiflora, rhizome, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
Ambrosia confertiflora, macro of carpellate flowers, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
Ambrosia confertiflora, macro of carpellate, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
Ambrosia confertiflora, pedicellate staminate flowers, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
Ambrosia confertiflora, leaf, photo Russ Kleinman and the Silver City Flora Group (Bill Norris, Wendy Graves, Jim & Jane Spinti, Angela Flanders, Betsy Kaido, & Jon Titus), Silver City, WNMU campus, 10th and West, September 4, 2025
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