Flora of North America species comparison

(simple or few to several from base), usually erect, rarely decumbent, branched basally and/or distally, (glabrous or pubescent).

(often subdecumbent), branched basally, (flexuous), 1.5–5.6(–8.5) dm.

basal and cauline;

petiolate or sessile;

basal rosulate or not, petiolate, blade margins usually entire, dentate, lyrate or pinnately lobed, rarely laciniate;

cauline petiolate or sessile, blade (base cuneate, attenuate, auriculate, sagittate, or amplexicaul), margins often entire, sometimes dentate or pinnately lobed.

petiole 1–6.5(–13) cm;

blade often lanceolate, sometimes oblong or oblanceolate, (2–)3.5–16.5(–20.5) cm × (5–)10–25(–45) mm, margins entire.

(ascending);

sessile;

blade lanceolate to linear, 1–7(–11) cm × 2–7(–14) mm, (base sagittate to somewhat amplexicaul), margins entire.

(corymbose, dense or lax), usually slightly to considerably elongated in fruit (sometimes not elongated in T. integrifolium).

(few-flowered, corymbose), elongated in fruit, (flower buds oblong).

sepals usually erect or ascending, rarely spreading to reflexed, ovate to oblong, linear, lanceolate, or oblanceolate, lateral pair slightly saccate or not basally;

petals (erect or spreading), white, lavender, or purple, spatulate to obovate, or oblanceolate to linear, (margins crisped or not), claw differentiated or not from blade, (apex rounded);

stamens subequal or tetradynamous, (exserted or included);

filaments (erect or spreading, usually distinct, very rarely median ones united), not dilated basally;

anthers usually linear to linear-oblong, rarely oblong or ovate, (sometimes apiculate, often circinately coiled after dehiscence);

nectar glands confluent and subtending bases of stamens, or 2 or 4 and lateral.

sepals erect, oblong, 3–4(–4.5) × 1–1.5(–1.7) mm;

petals lavender or white, often spatulate, sometimes oblanceolate or obovate, 6–9(–10) × (1.5–)2–3(–3.5) mm, margins not crisped, claw strongly differentiated from blade, (slender, 2–3.5(–4) mm, narrowest at base);

nectar glands lateral, median glands absent;

filaments tetradynamous, median pairs 3–4(–5) mm, lateral pair 2–3.5(–4) mm;

anthers included, oblong, 1–2(–2.5) mm, not circinately coiled;

gynophore (stout), 0.5–1 mm.

usually horizontal, erect to ascending, or divaricate, rarely reflexed, slender or stout, (flattened or not basally, glabrous).

usually horizontal to divaricate, rarely divaricate-ascending, straight or slightly curved upward, slender, (2.5–)4–9(–16) mm, slightly flattened at base.

stipitate, linear, torulose or smooth, terete, slightly 4-angled, or flattened;

valves each with prominent midvein, glabrous;

replum rounded;

septum complete;

ovules 12–128 per ovary;

style distinct, (often cylindrical, rarely subclavate or subconical);

stigma capitate, entire.

erect to ascending, torulose, slightly incurved or straight, terete, 1–2.5(–4.2) cm × 0.8–1(–1.5) mm;

ovules 12–30 per ovary;

style cylindrical, (0.3–)1–2(–3) mm.

uniseriate, plump or flattened, not winged, usually oblong, rarely ovate;

seed coat (minutely reticulate), not mucilaginous when wetted;

cotyledons oblique, rarely incumbent or accumbent.

(1–)1.3–1.5 × 0.5–8(–1) mm.

= 13.

= 26.