Flora of North America species comparison

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

(when present), usually ascending or decumbent, unbranched or branched from near base, 0–40 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.

1.7–26(–36) × (0.3–)0.5–4.5(–6.5) cm;

petiole (0.2–)1.7–11(–14) cm;

blade usually oblanceolate to rhombic or spatulate, rarely elliptic, obovate, lanceolate, or linear-oblanceolate, margins irregularly sinuate-dentate, serrate, pinnatifid, lobed, or subentire, apex usually acute to rounded, rarely acuminate.

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.

1–4(–6) per stem opening per day near sunset, with moderate to strong sweet scent with a rubbery background scent;

buds usually erect, rarely recurved (during early development);

floral tube (20–)40–140(–165) mm;

sepals (15–)18–45(–54) mm;

petals white, fading rose or rose pink to dark or deep rose purple, or pink to pale or light rose, or lavender, obovate or obcordate, (16–)20–50(–60) mm;

filaments (6–)10–30(–35) mm, anthers (6–)9–17(–20) mm;

style (45–)60–180(–185) mm, stigma exserted beyond anthers at anthesis.

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, curved, falcate, or sigmoid, usually cylindrical to lanceoloid or ellipsoid, sometimes ovoid, usually obtusely 4-angled, (10–)13–50(–68) × 4–9 mm, tapering to a sterile beak 6–8 mm, valve margins with rows of distinct tubercles to sinuate or nearly smooth ridges, dehiscent 1/3–7/8 their length;

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.

numerous in 1 or 2 rows per locule, usually obovoid, oblong, or triangular, rarely suborbicular, 2.1–3.9 × 1–2.6 mm, embryo 1/5–2/3 of seed volume, surface papillose, reticulate or rarely irregularly roughened;

seed collar sealed by a thin membrane, this flat or depressed into raphial cavity, when depressed often splitting, becoming separated from seed collar.

= 14, 28.

= 14, 28.