Flora of North America species comparison

absent.

(henceforth referred to as pitchers) rosette-forming, alternate, developing into hollow tubes;

stipules absent;

petiole clasping, dilated;

blade green, yellow-green, reddish, or purplish, often distinctly red, pink, or green, purple-veined or -blotched, sometimes white-areolate, winged laterally along its length, usually prominently costate, surfaces of pitcher and hood glabrous or hairy and minutely glandular;

orifice with thickened, revolute rim;

hoods variously arranged in association with orifices.

persistent, dying back if frozen, appearing with flowers and continuously all summer, erect, green to flushed red or solid maroon, often red- or purple-veined distally, major veins and crossveins of internal and external surfaces dark maroon-red, without white areolae, (short-petiolate, proximal solid petiolar portion to 1/4 length of pitcher, tapering gradually from base to orifice or sometimes scarcely bulging abaxially in distal portion), (6–)10–52(–57) cm, firm, waxy, external surface glabrous or puberulent, wings 0.5–2 cm;

orifice oval, 0.5–3.5 cm diam., rim green to red or maroon, tightly revolute, with no or distinct indentation distal to wing, sometimes forming spout; recurved adaxially, held beyond and covering orifice, sometimes held close to orifice, green to maroon, faintly red- or maroon-veined, or conspicuously and densely reticulate-veined, all veins of abaxial and adaxial surfaces of hood and neck red to maroon throughout proximal and distal portions, without white areolae, ovate, flat to slightly undulate, 0.7–4.5 × 0.7–4 cm, longer than wide, base attenuate to cordate, scarcely constricted, neck 0.5 cm, margins entire or slightly undulate (proximal margins scarcely reflexed), apiculum 1–3 mm, adaxial surface with hairs to 0.5 mm.

absent.

present or absent.

1–2, from 1 bud, 12–75 cm, usually 1.5–2(–3) times height of tallest pitchers;

bracts 0.4–1 cm.

1 or 2, bracteate, glabrous.

solitary flowers, arising from growing tip of rhizome.

strongly fragrant;

sepals maroon, 1.5–2.7 × 2–2.6 cm, (margins strongly reflexed abaxially after anthesis);

petals maroon to red, distal portion obovate, 2.5–4 × 1.3–2.5 cm, margins erose;

style disc greenish, 2–3.5 cm diam.

bisexual, nodding;

perianth and androecium hypogynous;

hypanthium absent;

sepals 5;

petals 5, distinct;

stamens 15 or 50–100, distinct or slightly fascicled;

anthers laterally dehiscent;

pistils 1, 5-carpellate;

ovary superior, 5-locular;

placentation axile to parietal;

ovules anatropous, bitegmic, tenuinucellate;

styles 1, terminal;

stigmas 5, distal.

capsular, globose to ovoid or obconic, shallowly 5- or 10-lobed, tuberculate, dehiscence loculicidal.

0.5–1.5 cm diam.

1.2–1.5 mm.

400–1000, tan, irregularly clavate to reniform-obovate;

embryo straight;

endosperm copious, oily.

= 26.