Melampodium longicorne A. Gray
Family: Asteraceae
(english: Arizona blackfoot)
Melampodium longicorne image
Ries Lindley  
Annuals, 10-60+ cm. Leaf blades lance-elliptic or oblanceolate to lance-linear, 25-50+ × 3-12+ mm, lengths 3-4(-6+) times widths, margins ± dentate or entire. Peduncles 4-30+ mm. Outer phyllaries 5, connate 0-1/6 their lengths, ovate to elliptic, 4-6+ mm. Ray florets 7-12; corollas yellow, laminae oblong-elliptic, 1.2-1.5+ × 0.7-1+ mm. Disc florets 8-10+. Fruits 3-3.5+ mm. 2n = 60. Flowering Aug-Oct. Sandy, gravelly, or loamy soils; 1200-1500 m; Ariz., N.Mex.; Mexico (Chihuahua, Sonora).
FNA 2006, Wiggins 1964, Kearney and Peebles 1969
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Erect annual 10-40 cm tall moderately branched from near base, stems and branches spreading-hispidulous. Leaves: Oblanceolate to oblong-spatulate, 5-15 mm wide (without projecting lobes), 1.5-5 cm long, entire with 1-2 pairs of abruptly spreading lobes 3-9 mm long, cuneate toward sessile base, acute at apex, blade sparsely scabro-hispidulous. Flowers: Heads sessile or subsessile at tips of branchlets, subtended by leaves 3-6 times as long as heads, outer involucral bracts distinct, obovate, abruptly short-acuminate, sparsely hispid on midrib and along margins, 3.5-4 mm long; ray flowers inconspicuous, ligules 1-2 mm long or less, barely equaling or usually shorter than outer involucral bracts; disk flowers few, often only 3-5, inconspicuous. Fruits: Cypselae about 4 mm long, lightly but distinctly ridged, 3 low ridges on each lateral face and one fainter dorsal one, outer angles each bearing 1-3 low conical tuber-like swelling or projection, oblique cup, outer margin drawn into a recurvingly coiled, Ecology: Found in canyons, on hillsides, along streams, and often on limestone from 4,000-5,500 ft (1219-1676 m); flowers March-October. Notes: Yellow ray flowers and the larger hooded fruit enveloping the achene set this plant apart from M. leucanthum. Also, pay attention to the curling involucral bracts. Ethnobotany: Unknown Etymology: Melampodium comes from Melampus, a soothsayer of renown in Greek mythology, while longicorne refers to the long spur, or hook on the fruit. Synonyms: None Editor: SBuckley, 2010
Melampodium longicorne image
Ries Lindley  
Melampodium longicorne image
Arizona State University Herbarium  
Melampodium longicorne image
Melampodium longicorne image
Sue Carnahan  
Melampodium longicorne image
David J. Bygott  
Melampodium longicorne image
Sue Carnahan  
Melampodium longicorne image
Sue Carnahan  
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Liz Makings  
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Liz Makings  
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image
Melampodium longicorne image