Flora of North America species comparison

1.

blades not white-margined;

basal spatulate or oblanceolate to elliptic-obovate, 7–50 × 1–15 cm, apex rounded to acute;

cauline leaves whorled, blade oblong-lanceolate.

cauline, often also basal, opposite, whorled, or rarely alternate, sessile or petiolate, simple;

stipules absent [rarely present as ocreae];

blade margins entire.

elongate, open proximally, ± dense distally.

cymes (sometimes racemoid, spicoid, or capitate), thyrses, or verticillasters, or solitary flowers;

flowers pedicellate or sessile.

calyx 10–25 mm;

corolla pale yellowish green, purple-dotted, occasionally suffused with purple distally, 12–25 mm, lobes elliptic-oblong to obovate, apex [obtuse or] acute to short-acuminate;

androecial corona scales 7–9 mm, deeply multicleft;

style slender, distinct;

nectaries and foveae 2 per corolla lobe, foveae narrowly elliptic, opening directly adaxial to nectary, each opening with a ± even fringe all around, the pair opening into a green but not rimmed area on the corolla surface.

bisexual or occasionally some unisexual [all unisexual on some or all plants], homostylous [heterostylous], protandrous and outbreeding or less often homogamous and autogamous, radially [somewhat bilaterally] symmetric, 4–12(–14)-merous [rarely 3-, 6-, or 16-merous] except for carpels;

perianth hypogynous, calyx and usually corolla persistent;

calyx green or occasionally ± hyaline (absent in Obolaria), sepals connate or some [or all] nearly distinct, lobes imbricate in bud, often ± unequal, colleters often present adaxially near base;

corolla petaloid, petals connate, lobes contorted in bud or rarely imbricate (Obolaria, Voyria), spurs present only in Halenia, 1 per petal;

stamens epipetalous, isomerous and alternate with petals, all fertile [rarely some sterile], equal [unequal];

filaments free or connected by a corona;

anthers 2-locular, dehiscing longitudinally [with terminal pores], remaining straight, recurving, or coiling helically or circinately, distinct or (only in some spp.

capsular, dehiscence septicidal or rarely rupturing irregularly (Obolaria) [indehiscent capsules, berries].

few–very many, usually sessile;

endosperm abundant and embryo small in autotrophic species, endosperm scant and embryo undifferentiated in completely mycotrophic species (Voyria).

Gentiana) coherent;

pistil 1, 2-carpellate;

ovary 1[or 2]-locular;

placentae 2, parietal [axile];

style present or absent, erect or initially deflexed to one side [declinate], uncleft, shallowly 2-cleft, or deeply cleft (Sabatia);

stigmas 1 or 2, coiling only in Sabatia, decurrent on ovary (only in Lomatogonium, sometimes slightly so in Bartonia).

 = 78.