Flora of North America species comparison

erect, glabrous.

essentially basal or, sometimes, highly reduced or absent (P. chlorantha, P. picta), alternate;

petiole present;

blade maculate or not, elliptic, ovate-elliptic, oblong-elliptic, oblanceolate, oblong-obovate, ovate, obovate, spatulate, subreniform, reniform, or round, subcoriaceous to coriaceous, margins entire, denticulate, crenulate, crenate, or crenate-serrulate, plane or revolute, surfaces glabrous.

sometimes reduced or absent;

petiole 8–60 mm, channeled adaxially, glabrous;

blade not or, rarely, obscurely maculate, dull and light green to purplish abaxially, shiny and dark green, rarely with white tissue bordering larger veins adaxially, ovate, elliptic, obovate, or round, (6–)18–28(–33) × (5–)10–30 mm, coriaceous, base rounded to truncate or decurrent, margins entire or crenulate to crenulate-serrulate, apex obtuse to rounded.

racemes, usually erect in flower and fruit, (symmetric);

peduncular bracts present or absent;

inflorescence bracts free from pedicels.

1–2(–3) per stem, (1–)2–8(–17)-flowered;

peduncular bracts absent or 1(–2), subulate to linear-lanceolate, 2.8–5 × 0.5–0.8 mm, membranous, margins entire or erose-denticulate;

inflorescence bracts subulate to lanceolate, usually shorter than, rarely longer than, subtended pedicels, (2.3–)3–5(–7.7) × 0.5–0.8 mm, membranous.

pendent in fruit;

bracteoles absent.

3–8 mm.

radially symmetric (bilaterally symmetric in P. minor), spreading or nodding;

sepals 5, connate proximally, often obscurely so, calyx lobes lanceolate, ovate, triangular, deltate, oblong, or obovate;

petals 5, distinct, white, greenish white, yellowish white, pink, or purplish red, without basal tubercles, corolla crateriform to broadly campanulate;

intrastaminal nectary disc absent;

stamens 10, exserted;

filaments broad proximally, gradually narrowed medially, slender distally, glabrous;

anthers oblong, without awns, with or without tubules, dehiscent by 2 round to elliptic or obovate pores;

pistil 5-carpellate;

ovary imperfectly 5-locular;

placentation intruded-parietal;

style (exserted or included), bent downward or straight (P. minor), expanded distally;

stigma 5-lobed, without subtending ring of hairs.

calyx lobes appressed or spreading in fruit, green or pinkish with margins hyaline to white, deltate to deltate-ovate, (0.9–)1.2–1.7 × (0.9–)1.3–1.9 mm, margins entire or obscurely erose-denticulate, apices acute to obtuse;

petals greenish white to yellowish white, obovate, (4–)4.5–9 × 3.3–5.5 mm, margins entire or obscurely erose-denticulate;

stamens 4–7.5 mm;

filament base 0.7–1.2 mm wide;

anthers (2.1–)2.5–3(–3.7) mm, apiculations absent or less than 0.1 mm, thecae creamy white or tan to yellowish, tubules yellowish brown, 0.7–1.1 mm, abruptly narrowed from thecae, lateral walls not touching or connivent distally, pores 0.2–0.4 × 0.1–0.2 mm;

ovary smooth;

style exserted, (4–)5–7 mm;

stigma 0.9–1.5 mm wide, lobes erect.

capsular, pendulous, dehiscence loculicidal, cobwebby tissue exposed by splitting valves at dehiscence.

depressed-globose, 3–4.5 × 3.5–6.4 mm.

ca. 1000, fusiform, winged.

= 23.

= 46.