Sabatia quadrangula
Sabatia foliosa
branching sabatia, four-angle sabatia, fourangle rose gentian
leafy marsh-pink or 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.
several–many, scattered or loosely clustered, terete or distally 4-ridged but not angled or winged, 0.8–7(–10) dm, branching generally all or mostly alternate, rarely all opposite.
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 absent at flowering time, internodes between cauline leaves generally less than 1.25 times as long as subtending leaves;
blade ovate-lanceolate to elliptic or linear, 1.5–6 cm × 4–14(–20) mm.
cymes of compact cymules;
pedicels 1–2(–4) mm.
open, few-flowered monochasial cymes or solitary flowers at ends of branches;
pedicels 10–70(–100) 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.
7–12(–14)-merous;
calyx tube shallowly campanulate, 1.5–4 mm, mid- and commissural veins about equally prominent, 4-ridged;
lobes linear to narrowly spatulate or ± foliaceous, 10–20 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, 12–30 × 3–10 mm, apex rounded to subacute;
anthers coiling circinately.
= 32, 34.
= 38.
Sabatia quadrangula
Sabatia foliosa
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 foliosa has often been treated as a variety of S. dodecandra. Its recognition at specific status follows R. L. Wilbur (1970b) and J. D. Perry (1971). As the internodes of S. foliosa are generally less than 1.25 times as long as, and often shorter than, the subtending leaves, whereas those of S. dodecandra are mostly 1.25–3.5 times as long, this species has a more leafy appearance than S. dodecandra. The leaves of S. foliosa are thinner in texture than those of S. dodecandra; the apices of the mid-stem leaves of S. foliosa are usually obtuse and those of the distal leaves merely subacute, whereas the apices of the mid-stem and distal leaves of S. dodecandra are usually acute; and the corolla lobes of S. foliosa are proportionately narrower than those of S. dodecandra (M. L. Fernald 1902; Wilbur 1955). Because of its stoloniferous habit, S. foliosa often forms dense colonies, which S. dodecandra does not. Natural hybrids between these taxa are unknown, and artificial hybrids are sterile (Wilbur 1970b; Perry).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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