Slideshow image
Zinnia grandiflora Nutt.
Family: Asteraceae
Rocky Mountain zinnia,  more...
[Crassina grandiflora (Nutt.) Kuntze]
Zinnia grandiflora image
Max Licher  
Subshrubs, 8-22 cm (rounded or flat-topped). Stems greenish, much branched, strigillose. Leaf blades 1- or 3-nerved (some larger leaves), linear, 10-30 × 2-3 mm, strigose to scabrous. Peduncles to 11 mm. Involucres narrowly campanulate to cylindric, 5-8 × 5-8 mm. Phyllaries oblong, often becoming scarious, glabrous or appressed-hairy distally, apices obtuse, erose-ciliate (red-tipped). Paleae yellowish (often red-tipped), apices obtuse, erose. Ray florets 3-6; corollas bright yellow, laminae ovate to orbiculate, mostly 10-18 mm. Disc florets 18-24; corollas red or green, to 10 mm, lobes 1 mm. Cypselae 4-5 mm, 3-angled (ray) or angular or compressed (disc), ribbed, scabrellous; pappi 0 or of (1-)2(-4) unequal awns. 2n = 42. Flowering spring-fall. Dry, often slopes, mesas, shortgrass prairies, calcareous soils; 600-2200 m; Ariz., Colo., Kans., N.Mex., Okla., Tex.; Mexico (Chihuahua, Coahuila, Sonora, Zacatecas).
FNA 2006, Martin and Hutchins 1980, Heil et al. 2013
Duration: Perennial Nativity: Native Lifeform: Subshrub General: Rounded or flat-topped perennial herbs, sometimes slightly woody, 8-22 cm tall, from a branched woody caudex; stems diffusely branched and roughly short-hairy. Leaves: Opposite, sessile, and crowded along the stems; blades linear, 1-3 cm long by 2-3 mm wide, usually 3-nerved, at least near the leaf base, rarely 1-nerved; surfaces covered with rough, short stiff hairs. Flowers: Flower heads showy and radiate, yellow with red-orange centers, on the tips of leafy branches; involucres campanulate to cylindric, 5-8 mm high; the bracts (phyllaries) oblong, thin and papery (scarious), in 3-4 graduated series, straw colored to yellow, often with red-tinted tips; ray florets 3-6 per flower head, the laminae (ray petals) bright yellow, ovate to orbiculate, 1-2 cm long; disc florets 18-24 per flower head, red to orange or occasionally green. Fruits: Achenes 4-5 mm long, ribbed and scabrellous; topped with pappus of 2 unequal awns (sometimes absent). Ecology: Found on dry slopes and flats, sometimes on calcareous soils, from 3,000-7,500 ft (914-2286 m); flowers June-September. Distribution: AZ, NM, CO, OK, s KA, TX; south to c MEX. Notes: An attractive, low-growing, mound-forming, perennial herb to subshrub; distinguished by its stiff-hairy linear leaves with 3 veins (1-veined in Z. acerosa); the few (3-6) showy, yellow ray flowers (white in Z. acerosa); and few deep-orange disc flowers. The ray petals droop a bit, are persistent, and become papery with age, making this species strongly resemble a paperflower (Psilostrophe spp). However Psilostrophe spp have yellow disc flowers and this species has red-orange disc flowers. Ethnobotany: Taken to treat kidney trouble, nose and throat trouble, and stomachaches; also used as a ceremonial emetic, applied to bruises, used as an eyewash, and made into both yellow and red dye. Etymology: Zinnia is named for Johan G. Zinn (1729-1759) a German botanist; grandiflora mean large-flowered. Synonyms: Crassina grandiflora Editor: SBuckley 2010, FSCoburn 2015, AHazelton 2017
Zinnia grandiflora image
Max Licher  
Zinnia grandiflora image
Max Licher  
Zinnia grandiflora image
Max Licher  
Zinnia grandiflora image
Liz Makings  
Zinnia grandiflora image
Max Licher  
Zinnia grandiflora image
Sue Carnahan  
Zinnia grandiflora image
Sue Carnahan  
Zinnia grandiflora image
Patrick Alexander  
Zinnia grandiflora image
Thomas Van Devender  
Zinnia grandiflora image
Thomas Van Devender  
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image
Zinnia grandiflora image