Sabatia dodecandra
Sabatia formosa
giant rose-gentian, marsh rose-gentian, perennial rose-gentian
Buckley's sabatia, stately rose gentian
1–several, clustered, terete or distally 4-ridged but not angled or winged, 0.8–6 dm, branching all or mostly alternate.
4-angled, sometimes with wings to 0.2 mm wide, 0.6–3 dm, branching all or mostly alternate.
basal absent at flowering time, internodes between cauline leaves mostly 1.25+ times as long as subtending leaves;
blade elliptic- or oblong-lanceolate, 1.5–7 cm × 4–12(–16) mm.
basal and cauline present at flowering time;
blade lanceolate to ovate, that is, widest proximal to middle, 0.8–2.5 cm × 3–13 mm.
open, few-flowered monochasia or solitary flowers at ends of branches;
pedicels 10–90(–110) mm.
open cymes;
pedicels 20–70 mm.
7–12(–14)-merous;
calyx tube obconic to campanulate, 1.5–4 mm, mid- and commissural veins about equally prominent, 4-ridged;
lobes linear to oblong-lanceolate or occasionally narrowly spatulate or ± foliaceous, 4–20 mm;
corolla purplish pink or rarely white, eye yellow, projections of eye into corolla lobes oblong, sometimes shallowly 3-lobed, usually with a red border, tube (3–)4–8 mm, lobes oblanceolate to narrowly spatulate-obovate, (10–)12–25 × 3–11 mm, apex rounded to subacute;
anthers coiling circinately.
5-merous;
calyx tube campanulate, 2–8 mm, commissural veins more prominent than midveins, strongly ridged, lobes linear, (4–)8–22 mm;
corolla purplish pink, eye greenish yellow, projections of eye into corolla lobes with a red border alternating with shorter white or paler yellow zones, tube 3–8 mm, lobes elliptic-rhombic, that is, widest near middle, 9–20 × 4–19 mm, apex ± acute;
anthers coiling circinately.
= 34 + 8B.
Sabatia dodecandra
Sabatia formosa
There are historical records of Sabatia dodecandra from Connecticut and New York. Reports from west of the range given here have been based on a concept of the species that included S. foliosa.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Sabatia formosa closely resembles S. campestris, within which it often has been included. By its earlier flowering, however, S. formosa is to some degree reproductively isolated from S. campestris where the two species are sympatric. N. B. Bell and L. J. Lester (1980) provided molecular as well as morphological evidence supporting the recognition of S. formosa as a species, and further morphological support has been found in studies for this flora. In S. formosa, the largest leaves are generally at and near the base of the stem, with the basal rosette usually persisting at flowering time. In S. campestris, the proximal leaves are generally smaller than those at mid stem, and the basal rosette is absent. The corollas of S. formosa are more deeply pigmented than those of S. campestris. The corolla lobes of S. formosa tend to be elliptic-rhombic, widest near the middle, whereas those of S. campestris are obovate, widest distally.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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