Flora of North America species comparison

unbranched to many-branched, and then sometimes producing dense clumps 5–50 cm diam., 2–14 cm.

usually unbranched, rarely with 1–several branches from near base, 10–40 cm.

1.7–10(–18) × (0.3–)0.5–2.5(–3.4) cm;

petiole (0.2–)3–5(–8) cm;

blade usually oblanceolate to linear-oblanceolate, rarely obovate, margins subentire, sinuate, or dentate to pinnatifid.

(2.8–)10–26(–36) × (0.6–)1–3(–4.5) cm;

petiole (3–)4–11(–14) cm;

blade usually oblanceolate to narrowly elliptic, rarely lanceolate, margins coarsely and irregularly pinnately lobed to dentate or, rarely, serrate.

floral tube (28–)35–75(–85) mm;

sepals (15–)18–25(–27) mm;

petals fading rose or sometimes deep rose purple, (16–)20–30(–35) mm;

filaments (6–)10–17(–20) mm, anthers 6–8(–10) mm;

style (45–)60–90(–105) mm.

floral tube (41–)80–140(–165) mm;

sepals (22–)34–45(–54) mm;

petals fading pink to lavender, (24–)35–50(–60) mm;

filaments (16–)20–30(–35) mm, anthers (10–)12–17(–20) mm;

style (78–)100–150(–185) mm.

usually falcate or sigmoid, especially when young, also somewhat flattened, ellipsoid-ovoid to lanceoloid, 10–31(–34) × 4–9 mm, valve margins with 8–15 tubercles or these coalesced into a sinuate ridge;

pedicel 0.5–1 mm.

straight, cylindrical to, sometimes, lanceoloid-cylindrical, slightly asymmetrical, (21–)25–50(–68) × 6–8 mm, valve margins with minute to conspicuous tubercles, these sometimes coalesced into a sinuate ridge;

pedicel (0–)1–40(–55) mm.

obovoid, oblong, or ± triangular, 2.9–3.5 × 1.1–2 mm, embryo 1/2–2/3 of seed volume, surface papillose, reticulate or very minutely roughened;

seed collar membrane depressed and often splitting, becoming separated from collar at maturity, margin conspicuously sinuate throughout, surface often ribbed, ribs forming partial or complete vertical partitions in collar.

usually narrowly to broadly obovoid, rarely suborbicular, 2.2–3.4 × 1.1–2.6 mm, embryo 1/5–1/2 of seed volume, surface appearing longitudinally striate, reticulate under magnification;

seed collar large, usually appearing inflated, sealed by a flat membrane which is often slightly depressed into seed collar cavity, margin entire or obscurely sinuate distally.

= 14, 28.

= 14.