Southwestern Cosmos Flower Click image below for high resolution macro image. Then click 'Close' in lower right corner to return. Southwestern Cosmos Flower Southwestern Cosmos Leaves Southwestern Cosmos Plant


Wildflowers of Southern Arizona


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Southwestern Cosmos.
Cosmos parviflorus
Aster (Asteraceae) family.

Plants 30-90 cm, glabrous or sparsely pubescent. Leaves: petioles ca. 0.5 cm; blades 2.5-6.5 cm, ultimate lobes to 1 mm wide, margins usually spinulose-ciliate, apices acute to obtuse. Peduncles 10-30 cm. Calyculi of spreading to reflexed, linear-oblong to narrowly lanceolate bractlets 6-9 mm, apices acute. Involucres (3-)5-10(-15) mm diam. Phyllaries erect, oblong, 5-8 mm, apices acute. Ray corollas white to rose-pink or violet, laminae cuneate-obovate, 5-9 mm, apices dentate. Disc corollas 4-5 mm. Cypselae 9-16 mm, setulose; pappi of 2-4 erect awns 2-3 mm.

Santa Catalina Mountains
Top of Ski Valley
Location: On Aspen Trail just south of top of Ski Valley.
Elevation: 9030 ft.
GPS: 32.44105, -110.77908
8/19/15

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