Wislizenus’s or Chiricahua Mountain gentian

Gentiana wislizeni Engelmann, Trans. Acad. Sci. St. Louis 2: 215, plate 7. 1863

Herbs annual, 10–50 cm. Stems erect, branched above base. Leaves: basal often withered by flowering, blades ovate to elliptic or spatulate, 5–20 × 3–6 mm; cauline blades ovate to lanceolate, 15–40 × 4–15 mm. Inflorescences terminal and axillary, dichasial or partly monochasial cymes; pedicels 3–20 mm. Flowers (4- or)5-merous; calyx 3–6 mm, tube deeply cleft, spathaceous, lobes minute, linear, 0.5–1.5 mm; corolla pale violet to pinkish white (often drying yellowish), tubular to narrowly funnelform, 6–14 mm, lobes spreading, narrowly ovate-elliptic, 3–4 mm, apex mucronate, with fringe of trichomes at base of each lobe (occasionally absent, especially in small flowers); ovary subsessile.

Flowering fall. Rocky sites in open pine and pine-oak woods; of conservation concern; 2000–2600 m; Ariz.; Mexico (Chihuahua, Durango).

In the flora area, Gentianella wislizeni is known only from a few localities in southeastern Arizona, the north­ernmost being in southern Apache County.

The corolla trichomes of Gentianella wislizeni are relatively short and in the undissected flowers of herbar­ium specimens are often concealed.