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Key to families | Table of families and genera
1. Filaments leaning away from style, leaving dilated bases separated, not forming cup; style <= ovary; leaves 2–8, 1–3 mm wide ..... B. clevelandii
1' Filaments parallel to style, dilated bases forming nectar cup; style > ovary; leaves 1–2, 3–15 mm wide
2. Scape 5–10 cm; perianth lobes ascending at base, gradually spreading above; leaves generally 1–2 ..... B. humilis
2' Scape 15–70 cm; perianth lobes abruptly spreading at base; leaves generally 1 ..... B. crocea
3. Nectar cup cusps < 1 mm ..... var. crocea
3' Nectar cup cusps > 1 mm
4. Nectar cup cusps 1–2 mm, < 1/2 filaments, tips acute ..... var. aurea
4' Nectar cup cusps 3–3.5 mm, ± 1/2 filaments, tips tapered ..... var. montana
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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