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.
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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