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Boechera
See list of 5 species in this genusReferences: Mulligan (1995), Al-Shehbaz (2003).
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1a. Fruiting pedicels erect; seeds aligned in 2 rows in each locule; petals 7–10 mm long, white to pink to rose-purple; lower stems usually with some mesifixed hairs or glabrous
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1b. Fruiting pedicels widely ascending to reflexed; seeds aligned in 1 row in each locule (rarely partially aligned in 2 irregular rows); petals 3–7 (–8) mm long, white to yellow-white (rarely light purple); lower stems glabrous or with simple or branched hairs, but none of the hairs mesifixed
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2a. Stem leaves narrowed to the base, not clasping the stem [Fig. 507]; siliques 2.5–3.5 mm wide
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2b. Stem leaves auriculate-clasping at the base; siliques 1–2.5 mm wide
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3a. Basal leaf blades sparsely to densely pubescent with compound hairs bearing 2–4 (–7) rays; seeds aligned in 1 row or partially aligned in 2 irregular rows in each locule; sepals abaxially glabrous or pubescent; petals white or sometimes light purple; pollen subspherical
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3b. Basal leaf blades glabrous to sparsely pubescent with simple hairs; seeds aligned in 1 row in each locule; sepals glabous; petals white to yellow-white; pollen ellipsoid
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4a. Petals 3–5 mm long, equaling to slightly exceeding the length of the sepals (i.e., petals up to 1.3 times as long as the sepals); stems glaucous, with relatively fewer leaf-bearing nodes, averaging 13 internodes to the first flower; basal leaf blades serrate to subentire
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4b. Petals 5–7 mm long, (1.3–) 1.4–2 times as long as the sepals; stems green, with relatively more leaf-bearing nodes, averaging 25 internodes to the first flower; basal leaf blades serrate to pinnately lobed [Fig. 508]
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Each photo represents one species in this genus.