Vreeland's Erigeron

Erigeron vreelandii is similar to E. speciosus in its perennial duration, tall stature, subclasping, spreading leaves nearly even-sized up the stems, corymbiform arrays, and blue rays; it is distinguished by the prominent vestiture of relatively long stipitate-glandular hairs. Intermediates apparently are formed between the two.

Perennials 30–80 cm; rhizomatous to subrhizomatous, fibrous-rooted, caudices usually relatively short and few branched, thick, woody. Stems erect, sometimes sparsely pilose (hairs 1–2 mm), densely stipitate-glandular. Leaves basal (usually withering by flowering) and cauline; basal blades oblanceolate-spatulate, 30–80 × 5–20(–25) mm (bases usually clasping to subclasping), margins entire, faces glabrous, densely stipitate-glandular; cauline blades narrowly lanceolate to oblong-, ovate-, or elliptic-lanceolate, nearly even-sized distally or sometimes mid largest (continuing to immediately proximal to heads). Heads 1–15(–22) in corymbiform arrays. Involucres 6–9 × 10–15(–18) mm. Phyllaries in 2–3(–4) series, densely stipitate-glandular. Ray florets 75–150; corollas blue to lavender, 9–17 mm (ca. 1 mm wide), laminae coiling. Disc corollas 3–4 mm. Cypselae 1.7–2 mm, 2-nerved, faces sparsely strigose; pappi: outer of (conspicuous) scales, inner of 14–22 bristles. 2n = 18.

Erigeron patens Greene; E. platyphyllus Greene; E. rudis Wooton & Standley

Erigeron vreelandii is a North American species of flowering plant in the family Asteraceae known by the common names sticky tall fleabane and Vreeland's erigeron. It grows in northwestern Mexico (state of Sonora) and in the southwestern United States (Arizona, New Mexico, Colorado).

Erigeron vreelandii grows on rocky slopes in open areas in forests or woodlands dominated by pine, oak, or fir. It is a perennial herb up to 80 centimeters (32 inches) tall, producing a rhizomes and a branching woody caudex. It generally produces 1-22 flower heads per stem. Each head contains 75–150 blue or lavender ray florets, surrounding numerous yellow disc florets.