What’s a dichotomous key?
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- Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
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- Dichotomous Key
- Polemoniaceae
Polemoniaceae
See list of 6 genera in this familyLeptosiphon androsaceus Benth. was reported from MA by Collins (1901; as Gilia androsacea). The voucher specimen was later determined to be a plant allied to G. tricolor and became the type for G. tricolor var. longipedicellata (this taxon now considered to be a taxonomic synonym of G. tricolor ssp. diffusa). See Deane (1904) for discussion of this record.
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1a. Bracts and calyx lobes spine-tipped; stigmas 2
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1b. Bracts and calyx lobes not spine-tipped (though sometimes awn-tipped); stigmas usually 3
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2a. Leaf blades simple and entire; stamens attached at different heights on the corolla
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3a. Most leaves opposite; corolla 12–30 mm wide; calyx with scarious or hyaline intervals between the green, ± herbaceous ribs, ruptured by developing capsule; seeds unchanged when wet
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3b. Leaves alternate; corolla narrower than 10 mm; calyx of nearly uniform chartaceous texture, not ruptured by developing capsule; seeds becoming mucilaginous when wet
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2b. Leaf blades compound or dissected; stamens attached at the same height on the corolla
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4a. Ultimate segments of leaf blades lanceolate to ovate; corolla campanulate [Fig. 782]; calyx herbaceous, somewhat accrescent in fruit
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4b. Ultimate segments of leaf blades narrow-linear to narrow-oblanceolate; corolla salverform; calyx firm, not accrescent
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5a. Corolla red on the abaxial surface, 20–40 mm long; inflorescence a slender, elongate thyrse
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5b. Corolla light purple to purple or white on the abaxial surface, 5–13 mm long; inflorescence of cymose clusters
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Show photos of: Each photo represents one genus in this family.