Flora of North America species comparison

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Convolvulus crenatifolius

Convolvulus equitans

dagger bindweed, Texas bindweed
Habit Perennials.
Stems

usually decumbent to procumbent or trailing, rarely twining-climbing, to 10+ dm, densely to sparsely hairy.
Leaf

blades ± elliptic to triangular-lanceolate or linear and proximally lobed, 10–70 × 2–40 mm, length 1.7–5+ times width, base simple or palmately 2–6-lobed, margins entire or toothed, surfaces densely to sparsely hairy.
Inflorescences

flowers 1(–3) per peduncle;

bracts lance-linear to lanceolate, 1–3 mm.
Flowers

sepals elliptic, oblong, or ovate, 6–12 mm;

corolla pink or white, center sometimes purplish to reddish, campanulate to ± rotate, (15–)25–30 mm, limb 5-angled.
Seeds

granulate or smooth.
2n

= 24.

Convolvulus crenatifolius

Convolvulus equitans
Phenology Flowering year-round.
Habitat Grasslands, hills, plains.
Elevation 0–2000 m. [0–6600 ft.]
Distribution
South America; Texas
from FNA
AL; AR; AZ; CO; KS; NE; NM; OK; TX; UT; Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (1 in the flora).

Subspecies montevidensis (Sprengel) J. R. I. Wood & Scotland is known from Argentina, Bolivia, Brazil, Paraguay, and Uruguay.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

In the flora area, Convolvulus hermanniae L’Héritier and C. incanus Vahl were long misapplied to C. equitans, and plants of C. crenatifolius were formerly identified as C. equitans.

B. L. Turner (2009) indicated that Convolvulus carrii differs from C. equitans by having herbage more densely silvery-hairy, leaf blades thicker and with veins more pronounced, peduncles longer, seeds smoother, and habitat restricted to fine sands in southern Texas, but these differences are not regarded here as significant.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Parent taxa Convolvulaceae > Convolvulus Convolvulaceae > Convolvulus
Sibling taxa
C. arvensis, C. equitans, C. simulans
C. arvensis, C. crenatifolius, C. simulans
Subordinate taxa
C. crenatifolius subsp. crenatifolius
Synonyms C. carrii, C. equitans var. lindheimeri, C. hermannioides
Name authority Ruiz & Pavon: Fl. Peruv. 2: 10, plate 118, fig. a. (1799) Bentham: Pl. Hartw., 16. (1839)
Source FNA vol. 14. Treatment author: Daniel F. Austin†. FNA vol. 14. Treatment author: Daniel F. Austin†.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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