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Machaeranthera tagetina Greene  

No occurrences found

Family: Asteraceae
mesa tansyaster
[Aster tagetinus (Greene) Blake]
Machaeranthera tagetina image
Max Licher
  • FNA
  • Field Guide
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David R. Morgan, Ronald L. Hartman in Flora of North America (vol. 20)
Annuals, 5-50 cm. Leaves 5-40 × 3-17 mm. Involucres broadly turbinate, 5-10 mm. Phyllaries 24-44 in 3-5 series, lanceolate to linear-lanceolate, 4-9 × 0.7-1.5 mm, apices usually appressed, sometimes spreading, acute to acuminate. Receptacles convex, 2-3.5 mm diam. Ray florets 8-16; laminae 6-15 × 1-3 mm. Disc florets 14-40(-45); corollas 4-7 mm, glabrous or glabrate; lobes 0.7-1 mm, hairy (hairs multicellular), 0.2-0.5 mm. Cypselae 2-3.5(-4) mm; pappi 2-8 mm. 2n = 8. Flowering Jul-Oct(-Dec). Grasslands, Larrea-dominated desert scrub, pine-oak woodlands, roadsides, streambeds; 700-1700(-2200) m; Ariz., N.Mex.; Mexico (Chihuahua, Sonora). In the flora area, Machaeranthera tagetina occurs in southern and central Arizona and southwestern New Mexico, in the Chihuahuan and Sonoran desert regions. Much of its range in those states overlaps with that of M. tanacetifolia. In southern and central Arizona, the two species occasionally hybridize.

FNA 2006, Wiggins 1964, Kearney and Peebles 1969
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Annual, or possibly biennial under favorable conditions, stems slender, moderately branched, 10-40 cm long, puberulent with both eglandular and gland-tipped hairs, slightly cinereous. Leaves: Lower leaves pinnatifid, 1.5-2.5 cm long, 3-7 lobes acute, spinulose-tipped, .5-3 mm broad, 2-6 mm long, upper leaves reduced and denticulate, all hirsutulous and glandular-puberulent. Flowers: Stems leafy to heads, these 10-15 mm wide, bracts lance-linear, 3-8 mm long, green herbaceous part triangular to lance-triangular, nearly as wide as papery part, densely glandular; rays 10-20, ligules 2-2.5 mm wide, 6-7 mm long, purplish; disk corollas 6-6.5 mm long, slender, slightly and gradually ampliate, glabrous. Fruits: Cypselae about 4 mm long, silky-villous; pappus bristles slender, 5-6 mm long, whitish. Ecology: Found on arid mesas, plains, and roadsides from 1,500-4,500 ft (457-1372 m); flowers from April-October. Ethnobotany: Unknown for this species, other species in this genus have limited use. Etymology: Machaeranthera comes from the Greek machaira, meaning sword and anthera or anthers, referring to the shape of the anther-tips, while tagetina refers to the genus Tagetes. Synonyms: Aster tagetinus Editor: SBuckley, 2010
Machaeranthera tagetina
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Machaeranthera tagetina image
Max Licher
Machaeranthera tagetina image
Max Licher
Machaeranthera tagetina image
Max Licher
Machaeranthera tagetina image
Max Licher
Machaeranthera tagetina image
Max Licher
Machaeranthera tagetina image
Max Licher
Machaeranthera tagetina image
Liz Makings
Machaeranthera tagetina image
Anthony Mendoza
Machaeranthera tagetina image
Liz Makings
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NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.