Sabatia quadrangula
Sabatia formosa
branching sabatia, four-angle sabatia, fourangle rose gentian
Buckley's sabatia, stately rose gentian
usually single, occasionally 2–several, 4-angled with wings 0.1–0.5 mm wide, 1.5–5(–7.5) dm, branching all opposite or secondary and/or tertiary occasionally alternate.
4-angled, sometimes with wings to 0.2 mm wide, 0.6–3 dm, branching all or mostly alternate.
basal and cauline or only cauline present at flowering time;
basal blades spatulate-obovate;
cauline blades linear-oblong to ovate-lanceolate, 0.8–2.5(–6) cm × 3–8(–18) 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.
cymes of compact cymules;
pedicels 1–2(–4) mm.
open cymes;
pedicels 20–70 mm.
5-merous;
calyx tube widely obconic to campanulate, 1.5–3(–3.5) mm, mid- and commissural veins about equally prominent, low-ridged, lobes linear-subulate or rarely wider, 2–8(–11) mm;
corolla white throughout (sometimes drying yellow or salmon) or occasionally with a yellow eye, projections of eye into corolla lobes, when present, triangular, without a contrasting border, tube 2.5–7 mm, lobes oblanceolate to narrowly spatulate-obovate, 4.5–15 × 1.5–6 mm, apex rounded to obtuse;
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.
= 32, 34.
Sabatia quadrangula
Sabatia formosa
The name Sabatia paniculata (Michaux) Pursh was misapplied to this species for many years but is typified by a specimen of S. difformis (R. L. Wilbur 1955).
(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.)
WildflowerSearch
iNaturalist
USDA Plants Database
LA Plants
