Cordylanthus laxiflorus

A. Gray in W. H. Emory

Rep. U.S. Mex. Bound. 2(1): 120. 1859.

Common names: Nodding bird’s-beak
Treatment appears in FNA Volume 17. Treatment on page 672. Mentioned on page 670, 673, 674.

Stems erect, 30–90 cm, hirsute to pilose, hairs glandular and eglandular. Leaves densely pilose; proximal 5–20 mm, margins 3-lobed, lobes 1 mm wide; distal 5–15 × 1 mm, margins entire. Inflorescences spikes, 1 (–4) -flowered; bract 1, 5–7 mm, 3-lobed, lobes green or purple, narrowly lanceolate. Pedicels: bracteoles 10–20 mm, margins entire. Flowers: calyx 10–17 mm, tube 2 mm, apex 2-fid, cleft 0.5–1 mm; corolla bright-yellow, 15–20 mm, throat 3–5 mm diam., abaxial lip 7–10 mm, shorter than adaxial and slightly spreading; stamens 4, filaments hairy, fertile pollen-sacs 1 per filament, vestigial pollen-sacs present. Capsules oblong-lanceoloid, 7–8 mm. Seeds 15–20, light-brown, reniform, 1.5–2 mm, reticulate and papillate. 2n = 26.


Phenology: Flowering Jul–Oct.
Habitat: Rocky slopes, mesas, often limestone.
Elevation: 1000–1900 m.

Distribution

Ariz., N.Mex., Mexico (Sonora)

Discussion

Cordylanthus laxiflorus is recognized by its bright yellow corollas with adaxial lip shorter than the galea. Cordylanthus parviflorus also has the abaxial lip shorter than the adaxial; it has pink to purple corollas.

Selected References

None.

Lower Taxa

None.
... more about "Cordylanthus laxiflorus"
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
rounded +  and galeate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Kerry A. Barringer +
A. Gray in W. H. Emory +
? (?) +  and ? (?) +
3-lobed +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
spathe-like +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
oblong-lanceoloid +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Nodding bird’s-beak +
bright-yellow +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Ariz. +, N.Mex. +  and Mexico (Sonora) +
1000–1900 m. +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Rocky slopes, mesas, often limestone. +
axillary +  and terminal +
deciduous +
purple +  and green +
lanceolate +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering Jul–Oct. +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Rep. U.S. Mex. Bound. +
15 +  and 20 +
papillate +
reniform +
subequal +
aerial +  and subterranean +
30 cm300 mm <br />0.3 m <br /> (90 cm900 mm <br />0.9 m <br />) +
not fleshy +
expanded +
Adenostegia +
Cordylanthus laxiflorus +
Cordylanthus +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +