Tradescantia ernestiana |
Tradescantia spathacea |
|
---|---|---|
Ernest's spiderwort |
boat-lily, moses-in-the-cradle, oyster-plant |
|
Habit | Herbs, erect or ascending, rarely rooting at nodes. | Herbs, erect or ascending, rarely rooting at nodes. |
Roots | (1–)1.5–5 mm thick, fleshy. |
|
Stems | not flexuous, 5–40 cm; internodes usually glabrous. |
unbranched, short. |
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. |
spirally arranged; blade usually abaxially purple, adaxially green, strap-shaped, to 35 × 5 cm (distal leaf blades wider or narrower than sheaths when sheaths opened, flattened), leathery, succulent, glabrous. |
Inflorescences | terminal; bracts foliaceous. |
axillary, sessile, or pedunculate in axils well below shoot apex, cymes enclosed in pairs of boat-shaped spathes. |
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 glabrous; sepals distinct, white, 3–6 mm, glabrous; petals distinct, white, ovate, not clawed; stamens free; filaments bearded. |
Capsules | 5–7 mm. |
3- or (by abortion) 2-locular, 3–4 mm. |
Seeds | 2–3 mm. |
1 per locule, 3–4 mm. |
2n | = 12. |
= 12 (Belize). |
Tradescantia ernestiana |
Tradescantia spathacea |
|
Phenology | Flowering spring (Mar–May). | Flowering winter (Jan). |
Habitat | Wooded hillsides, ledges and bluffs, occasionally along streams or in pastures | Occasionally escaped to hammocks and weedy places |
Distribution |
AL; AR; GA; MO; OK; TX
|
FL; Mexico; Central America; West Indies [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.) |
Tradescantia spathacea is native to southern Mexico, Central America, and the West Indies. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Commelinaceae > Tradescantia | Commelinaceae > Tradescantia |
Sibling taxa | ||
Synonyms | Rhoeo discolor, Rhoeo spathacea | |
Name authority | E. S. Anderson & Woodson: Contr. Arnold Arbor. 9: 58, plate 8, map 4. (1935) | Swartz: Prodr. 57. (1788) |
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