Flora of North America species comparison

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

(if present) usually unbranched, rarely with 1–several short laterals, 0–6(–21) 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–)7–16(–21) × (0.3–)1–3(–5) cm;

petiole (1–)3–7(–10) cm;

blade obovate to linear-oblanceolate, margins coarsely and irregularly serrate or dentate, sometimes pinnately lobed or subentire.

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 (20–)40–60(–85) mm;

sepals (15–)24–35(–40) mm;

petals fading rose pink to dark rose purple, (16–)25–40(–48) mm;

filaments (12–)15–24(–26) mm, anthers 9–12 mm;

style (45–)60–120 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.

falcate or sigmoid, becoming nearly straight at maturity, asymmetrical and often somewhat flattened, lanceoloid to ovoid, (10–)20–40(–50) × 4–6 mm, valve margins with prominent, sinuate ridge with 5–10 peaks, or nearly distinct tubercles;

pedicel 0.5–3 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.

narrowly obovoid, 2.5–3.9 × 1.2–1.7 mm embryo 1/2–2/3 of seed volume, surface papillose;

seed collar oblong, membrane depressed deeply into raphial cavity, margin usually sinuate only distally, sometimes sinuate throughout.

= 14, 28.

= 14.