No key was found for the requested taxon, but it has only one child: Cicerbita muralis. Showing where it is keyed below.

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Key to Asteraceae, Key E: herbaceous composites with leaves alternate or basal,
liguliflorous heads (composed of ligulate florets), and sap usually milky

Asteraceae

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1 Cypselae (at least of the inner florets of the head) beaked, the beak usually > ½ the length of the cypselae body.
  2 Heads solitary and terminal at the end of a stem unbranched to its base.
    3 Flower color pink to purple or white
    3 Flower color yellow to yellowish-white.
      4 Leaves basal and cauline, grasslike (untoothed and unlobed); stem leafy
      4 Leaves basal only, variously toothed to pinnately lobed; stem scapiform (leafless).
        5 Pappus either of outer scales and inner bristles or entirely of aristate scales.
          6 Pappus of outer scales and inner plumose bristles; leaves oblanceolate to oblong; plants annual or perennial
  2 Heads several per stem, in various corymbiform, umbelliform, spiciform, or paniculiform arrays (rarely solitary and terminal in the smallest and most depauperate individuals in a population.
                 9 Plants taprooted annuals or biennials, without rhizomes
                 9 Plants rhizomatous perennials, the rhizomes deeply rooted in the substrate
                   10 Pappus of plumose bristles, at least the inner series; plant an annual or biennial.
                   10 Pappus of simple capillary bristles; plant an annual, biennial, or perennial.
                       12 Beak of the cypsela with a ring of soft white reflexed hairs at the summit (just below the pappus); phyllary apices usually with keel-like flap
                       12 Beak of the cypsela lacking a ring of hairs as described; phyllary apices lacking keel (phyllary bases can be keeled in Crepis)
                          13 Pappus either of 40-50 (or more) smooth bristles or of 20-30 barbellulate bristles; plant a perennial.
1 Cypselae beakless, the apex typically rounded or truncate (sometimes tapered but lacking a distinct beak and conspicuously < ½ the length of cypselae body).
                              15 Leaves basally disposed (stem leaves few or none, if present generally smaller in size than the basal leaves, which are persistent into flowering and fruiting); corollas yellow, orange, or red.
                                  17 Heads solitary or 2-3; pappus absent, the cypselae never bearing scales or bristles; cypselae with 8-10 ribs (3-5 prominent); [waif, ne. US]
                                  17 Heads solitary; pappus present (occasionally absent in Krigia); cypselae with 10-20 ribs; [widespread natives]
                                    18 Pappus of 40-80 smooth to barbellulate bristles and sometimes a few subulate to setiform scales (but pappus never absent); [Great Plains, midwest US]
                                             22 Flowers usually yellow to orange; [widespread, including TX; tribe Cichorieae].
                                               23 Involucre 3-5 mm high; achenes 1.5-2.5 mm long; pappus bristles basally connate (unified basally into a ring-like structure at the junction of achene summit), 2.5-3.5 mm long
                              15 Leaves basal and cauline (plant often beginning with a basal rosette, but by flowering bearing well-developed stem leaves about as large as the basal leaves, the basal rosette often withering prior to flowering and fruiting); corollas yellow, orange, red, blue, pink, white, or lavender.
                                                          28 Cypselae 1.2-2.8 mm long; heads borne single at the ends of scapiform stems that are unbranched (rarely few-branched near the base); plants to 7 dm tall
                                                                   32 Leaves linear, entire, < 3 mm wide, or reduced to scales; cypselae 11-14 mm long; [of the Coastal Plain of GA and se. AL south to s. FL]
                                                                   32 Leaves broader, of various shapes, usually hastate, irregularly lobed, and/or serrate; cypselae 3.5-10 mm long; [collectively widespread in our area, south to n. FL]