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The Plants of Michigan: Simple Keys for the Identification of the Native Seed Plants of the StateGleason, Henry A. (Henry Allan)

Science

The Plants of Michigan: Simple Keys for the Identification of the Native Seed Plants of the State

Name: The Plants of Michigan: Simple Keys for the Identification of the Native Seed Plants of the State
Author: Gleason, Henry A. (Henry Allan)

Gleason, Henry A. (Henry Allan)

Plants -- Michigan

11b. Rootstock long and slender; berries 3-angled
                                   =Twisted-stalk, Streptopus longipes.=

     12a. Perianth-segments 5-12 cm. long --13.

     12b. Perianth-segments shorter than 5 cm. --19.

13a. Leaves all or chiefly basal, stem-leaves bract-like or none --14.

13b. Leaves chiefly or entirely on the stem --15.

     14a. Leaves numerous, linear or sword-shape (flowers orange,
          summer)                        =Day Lily, Hemerocallis fulva.=

     14b. Leaves a single pair, oblong or lanceolate --21.

15a. Leaves a single whorl of 3 (Wake Robin, Trillium) --22.

15b. Leaves numerous (6-12 dm. high; flowers yellow, orange, or red, in
     summer) (Lily) --16.

     16a. Flowers erect --17.

     16b. Flowers nodding --18.

17a. Leaves narrowly lanceolate, 6-15 mm. wide, mostly whorled
                                     =Wood Lily, Lilium philadelphicum.=

17b. Leaves linear, 5 mm. wide or less, almost all alternate
                        =Wood Lily, Lilium philadelphicum var. andinum.=

     18a. Perianth-segments strongly revolute
                                     =Turk's-cap Lily, Lilium superbum.=

     18b. Perianth-segments half-recurved
                                        =Yellow Lily, Lilium canadense.=

19a. Flower solitary --20.

19b. Flowers in clusters, not solitary --31.

     20a. Stem with a single pair of basal leaves (Dog's-tooth Violet)
          --21.

     20b. Stem with a single whorl of 3 leaves (1-3 dm. high; spring)
          (Wake Robin, Trillium) --22.

     20c. Stem leafy (Bellwort) --29.

21a. Perianth yellow       =Dog's-tooth Violet, Erythronium americanum.=

21b. Perianth white, bluish, or pinkish
                              =Dog's-tooth Violet, Erythronium albidum.=

     22a. Flower sessile, red or brown --23.

     22b. Flower peduncled, white or pink, rarely red --24.

23a. Leaves sessile, sepals spreading    =Wake Robin, Trillium sessile.=

23b. Leaves short-petioled, sepals reflexed
                                      =Wake Robin, Trillium recurvatum.=

     24a. Ovary with 6 distinct wing-like angles --25.

     24b. Ovary obtusely 3-angled or lobed --28.

25a. Stamens distinctly longer than the pistil --26.

25b. Stamens equaling or shorter than the pistil --27.

     26a. Stigmas erect or nearly so, slender
                                    =Wake Robin, Trillium grandiflorum.=

     26b. Stigmas strongly recurved or spreading
                                         =Wake Robin, Trillium erectum.=

27a. Filaments about as long as the anthers
                                         =Wake Robin, Trillium cernuum.=

27b. Filaments half as long as the anthers or shorter
                                      =Wake Robin, Trillium declinatum.=

     28a. Leaves obtuse; petals obtuse, white
                                =Dwarf White Trillium, Trillium nivale.=

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The Plants of Michigan: Simple Keys for the Identification of the Native Seed Plants of the State

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