Flora of North America species comparison

erect, unbranched basally, branched distally, (basally hirsute with simple trichomes or sparsely pubescent with branched ones).

unbranched or branched distally, 1.5–4(–6) dm, densely to moderately hirsute-hispidulous basally, trichomes simple, to 3.5 mm, mixed with fewer, branched ones, (glabrescent distally).

basal and cauline;

petiolate or subsessile;

basal (often withered by flowering), rosulate or not, petiolate, blade margins entire or toothed or, rarely, lobed;

cauline blade (base auriculate or sagittate), margins entire, dentate to lobed, or denticulate.

persistent after anthesis (into fruiting).

blade lanceolate to oblong, (1–)2–6(–9) cm × 2–10(–20) mm, base sagittate or minutely auriculate, margins entire or irregularly denticulate, (often subciliate), apex acute, surfaces pubescent, trichomes primarily simple.

(corymbose, several-flowered), considerably elongated in fruit, (rachis straight, rarely strongly flexuous).

sepals erect to ascending, oblong or ovate;

petals usually yellow, rarely white, oblanceolate [spatulate], (longer than sepals), claw and blade somewhat differentiated, (apex obtuse);

stamens in 3 pairs of unequal length;

filaments not dilated basally;

anthers ovate or oblong, (apex obtuse);

nectar glands (4), lateral, 1 on each side of lateral stamen.

sepals (2.7–)3–4(–4.5) × 0.5–1 mm;

petals white or creamy white, (5–)6–8(–9) × 1.5–2 mm;

filaments 2–3.5 mm;

anthers ca. 0.5 mm.

ascending to divaricate, slender.

ascending to divaricate, 7–10(–14) mm.

silicles or, rarely, siliques, dehiscent, shortly stipitate, pyriform, obovoid, or depressed globose [linear], keeled or not, slightly latiseptate;

valves each with prominent or obscure midvein, (leathery, smooth, margins of each flattened and connate, apex abruptly caudate and extending 1–2.5 mm onto, and appearing as part of, style), pubescent;

replum concealed by connate margins of valves;

septum complete;

ovules 8–25 per ovary;

stigma capitate.

pyriform to obovoid, 5–7 × 3.5–5 mm, apex acute;

valves each obscurely veined, margin narrowly winged;

style 2–3 mm.

biseriate or, rarely, uniseriate, plump or slightly flattened, not winged or narrowly margined, oblong;

seed coat (minutely reticulate), copiously mucilaginous when wetted;

cotyledons incumbent or, rarely, accumbent.

brown, 1.2–1.5 × 0.5–0.6 mm.

= 6, 7, 10, 13.

= 12, 26.