Keckiella antirrhinoides

(Bentham e× A. de Candolle) Straw
Brittonia 19: 203. 1967.
Common names: Snapdragon penstemon
Illustrated
Basionym: Penstemon antirrhinoides Bentham e× A. de Candolle in A. P. de Candolle and A. L. P. P. de Candolle Prodr. 10: 594. 1846
Treatment appears in FNA Volume 17. Treatment on page 77. Mentioned on page 68, 76.

Stems spreading to erect, 6–25 dm, canescent, rarely glabrous when young. Leaves opposite, on short shoots as axillary clusters on older stems; blade oblanceolate or lanceolate to narrowly obovate or ovate, 5–20 mm, margins entire or 2-toothed, sometimes relatively small. Inflorescences panicles, finely short-hairy and sparsely glandular. Flowers: caly× 3–9 mm, lobes lanceolate to ovate; corolla yellow drying blackish, 15–23 mm, tube plus distinct throat 6–10 mm, shorter than adaxial lip, adaxial lip 8–15 mm; pollen sacs 1.1–1.8 mm; staminode densely yellow-hairy, exserted.

Distribution

Ariz., Calif., Nev., nw Mexico.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Calyces 3–6 mm, lobes widely ovate, apices obtuse to acute; plants finely hairy; pollen sacs 1.4–1.8 mm. Keckiella antirrhinoides var. antirrhinoides
1 Calyces 5.5–9 mm, lobes lanceolate, apices acute to acuminate; plants canescent; pollen sacs 1.1–1.5 mm. Keckiella antirrhinoides var. microphylla