Tradescantia ernestiana |
Tradescantia crassula |
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Ernest's spiderwort |
succulent spiderwort |
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Habit | Herbs, erect or ascending, rarely rooting at nodes. | Herbs, decumbent, rooting at nodes. |
Roots | (1–)1.5–5 mm thick, fleshy. |
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Stems | not flexuous, 5–40 cm; internodes usually glabrous. |
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Leaves | spirally arranged, sessile; blade dull green, linear-lanceolate to lanceolate-oblong, 9–27 × 1–4 cm (distal leaf blades wider than sheaths when sheaths opened, flattened), base cuneate to rounded, apex acuminate, not glaucous, glabrous or sparsely puberulent. |
2-ranked; blade lanceolate-oblong to ovate-elliptic, 5–10 × 2–3.5 cm (distal leaf blades wider or narrower than sheaths when sheaths opened, flattened), margins ciliolate, apex acute, glabrous. |
Inflorescences | terminal; bracts foliaceous. |
terminal and axillary from distal leaf axils, 2–4 cyme pairs per stem; bracts foliaceous or more commonly reduced (especially in axillary inflorescences). |
Flowers | distinctly pedicillate; pedicels 2–3.2 cm, minutely pilose; sepals somewhat inflated, 9–16 mm, uniformly eglandular-pilose; petals distinct, deep blue, purple, or rose-red, broadly ovate, not clawed, 1.2–1.5 cm; stamens free; filaments bearded. |
distinctly pedicillate; pedicels 1–2 cm, glandular-pilose especially toward apex; sepals 5–7 mm, midrib pilose with glandular and eglandular hairs; petals distinct, white, not clawed, 9 mm; stamens free; filaments white, densely bearded with white hairs. |
Capsules | 5–7 mm. |
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Seeds | 2–3 mm. |
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2n | = 12. |
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Tradescantia ernestiana |
Tradescantia crassula |
|
Phenology | Flowering spring (Mar–May). | Flowering spring (May). |
Habitat | Wooded hillsides, ledges and bluffs, occasionally along streams or in pastures | Under live oaks |
Distribution |
AL; AR; GA; MO; OK; TX
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FL; South America [Introduced in North America] |
Discussion | Tradescantia ernestiana is sympatric with, and easily confused with, T. virginiana in northern Alabama and perhaps northern Georgia [reported from Georgia by C. Sinclair (1967, p. 87), but no specimens are cited and I have seen none]. At present, the two species can be separated only by the relative width of the blade and sheath of the distal leaves. They are obviously closely related and should be studied in the field in the southern Appalachians where their ranges overlap. The Texas record is taken from C. Sinclair (1967). The hybrid Tradescantia ernestinana × T. ozarkana is known from Arkansas and Missouri. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Commelinaceae > Tradescantia | Commelinaceae > Tradescantia |
Sibling taxa | ||
Name authority | E. S. Anderson & Woodson: Contr. Arnold Arbor. 9: 58, plate 8, map 4. (1935) | Link & Otto: Icon. Pl. Rar. 2: 13, plate 7. (1828) |
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