5.
Gaillardia aristata
Pursh, Fl. Amer. Sept. 2: 573. 1813.
Perennials
(sometimes flowering first year), 20—80 cm.
Leaves
basal and cauline or cauline; petiolar bases 5—15 cm; blades oblanceolate to lanceolate, 5—15 cm × 5—30(—40) mm, margins raggedly pinnately lobed to toothed or entire, faces scabrellous and/or sparsely to densely villous (hairs jointed).
Peduncles
(5—)20—35+ cm.
Phyllaries
24—40+ ovate to lance-attenuate, 10—15+ mm, ciliate with jointed hairs (also strigose and gland-dotted).
Receptacular setae
2—6 mm.
Ray florets
(6—)12—18+; corollas yellow or yellow/purple, rarely tubular and 5-lobed, usually distally laminate and 3-lobed, 15—35+ mm.
Disc florets
60—120+; corollas usually purple or purple-tipped, sometimes yellow, tubes 0.5—1.5 mm, throats cylindric to urceolate, 4.5—5.5 mm, lobes lance-ovate to triangular-attenuate, 1—2 mm, jointed hairs 0.3+ mm.
Cypselae
clavate (outer) to obpyramidal (inner), 2.5—6 mm, hairs 1.5—2.5 mm, inserted at bases;
pappi
of 8 ovate to lanceolate, aristate scales 5—6 mm (scarious bases 1.5—3 × 0.4—1.5 mm).
2
n
= 34, 68.
Flowering May—Sep. Open places, usually among aspens or pines, or with sagebrush, often dry, sandy benches or bars; 200—2900 m; Alta., B.C., Man., N.W.T., Sask., Yukon; Colo., Conn., Idaho, Mass., Minn., Mont., N.H., N.Dak., Oreg., S.Dak., Utah, Wash., Wyo.
