Epixiphium wislizeni

(Engelmann ex A. Gray) Munz

Proc. Calif. Acad. Sci., ser. 4, 15: 380. 1926.

Common names: Sand snapdragon
Illustrated
Basionyms: Maurandya wislizeni Engelmann ex A. Gray in W. H. Emory Rep. U.S. Mex. Bound. 2(1): 111. 1859
Synonyms: Asarina wislizeni (Engelmann ex A. Gray) Pennell
Treatment appears in FNA Volume 17. Treatment on page 21. Mentioned on page 19.

Annuals 30–120 cm, vines. Leaves: petiole 14–54 mm; blade hastate to broadly sagittate, 21–75 × 8–48 mm, surfaces glabrous. Pedicels ascending, 3–9 mm, thickened in fruit. Flowers: sepals 13–18 × 2–4 mm, basally keeled, membranous in flower, 20–32 × 8–12 mm, indurate in fruit; corolla-tube 17–22 mm, glabrous or sparsely hairy, throat open, palate not inflated, abaxial plicae white spotted with blue or violet, lobes: abaxial reflexed, adaxial erect, equal, 7–12 mm; stamens included, filaments incurved, hairy at base, abaxial 11–13 mm, adaxial 13–15 mm, pollen-sacs oblong; ovary glabrous, locules subequal; style included, 13–15 mm, indurate in fruit, stigma recurved. Capsules ovoid, compressed apically, 11–15 mm, indurate. Seeds 3–4 mm, surface tuberculate, circumalate. 2n = 24.


Phenology: Flowering Apr–Nov.
Habitat: Active and stabilized siliceous and gypseous dunes and sandy soils.
Elevation: 1100–2100 m.

Distribution

Ariz., Calif., N.Mex., Tex., Mexico (Chihuahua)

Discussion

Epixiphium wislizeni is easily identified in fruit and by its occurrence on unconsolidated, sandy soils. When vegetative or in flower, it resembles Maurandella antirrhiniflora. In Texas, E. wislizeni is known from the trans-Pecos region.

Selected References

None.

Lower Taxa

None.

... more about "Epixiphium wislizeni"
, +  and white spotted with blue or white spotted with violet +
1.1 cm11 mm <br />0.011 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Wayne J. Elisens +
(Engelmann ex A. Gray) Munz +
alternate +, opposite +, whorled +, helical +  and subopposite +
Maurandya wislizeni +
2.1 cm21 mm <br />0.021 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
hastate;broadly sagittate +
not leathery +  and fleshy +
8mm;48mm +
campanulate +
compressed +  and ovoid +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Sand snapdragon +
1.7 cm17 mm <br />0.017 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
hairy +  and glabrous +
blue +  and violet +
Ariz. +, Calif. +, N.Mex. +, Tex. +  and Mexico (Chihuahua) +
drupe-like +
1100–2100 m. +
curved +  and straight +
2 cm20 mm <br />0.02 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
1 +  and 4 +
8mm;12mm +
Active and stabilized siliceous and gypseous dunes and sandy soils. +
persistent +  and deciduous +
subequal +
entire +  and subentire toothed or lobed +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
not inflated +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
5 +  and 4 +
1.4 cm14 mm <br />0.014 m <br /> (5.4 cm54 mm <br />0.054 m <br />) +
Flowering Apr–Nov. +
Proc. Calif. Acad. Sci., ser. +
minute +
ovoid-ellipsoid +
distinct +
indurate +  and membranous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Illustrated +
filamentous +
scrambling +  and climbing +
sprawling +, creeping +  and prostrate +
reclining;pendent;spreading;arching;erect;ascending;erect;ascending;decumbent +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
tuberculate +
Asarina wislizeni +
Epixiphium wislizeni +
Epixiphium +
species +
gibbous +  and not spurred +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +