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, erect, monomorphic, twisted through 90–270°, yellowish green, often suffused with red, distally enlarging into globose head, firm, surfaces glabrous;

orifice round, facing ground, not covered by hood;

hood arising adaxially on rim of orifice, pendulous, fishtail-shaped, flattened or slightly twisted, 2-lobed, lobes widely divergent laterally from pitcher axis, yellowish green to reddish, base narrowed to neck, apex acute to rounded.

present or absent.

absent.

1 or 2, bracteate, glabrous.

1, slightly longer to much longer than pitchers;

bracts usually 9, alternate along scape, clasping, erect or spreading, lanceolate, apex acute.

solitary flowers, arising from growing tip of rhizome.

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.

odorless;

sepals persistent, lance-ovate to oblanceolate, margins entire, apex acute;

petals deciduous, touching, forming curtain surrounding stamens and pistil, pendulous, ovate, each notched beyond middle (distally) so that indentations of adjacent petals align forming 5 holes in corolla, margins entire, apex acuminate;

stamens 15, distinct;

filaments uniform in length;

anthers basifixed;

ovary turbinate, shallowly 10-lobed, apex depressed;

style terminal, arising from depressed apex of ovary, terminating in 5 radially diverging, filiform arms covered with stigmatic cells laterally.

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

obconic, finely tuberculate, acropetally dehiscent.

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

embryo straight;

endosperm copious, oily.

ca. 1000, long-clavate, not keeled, long-papillate.

= 15.