Sabatia quadrangula
branching sabatia, four-angle sabatia, fourangle 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.
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.
cymes of compact cymules;
pedicels 1–2(–4) 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.
= 32, 34.
Sabatia quadrangula
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.)
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