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
Gleason, Henry A. (Henry Allan)
Plants -- Michigan
61a. Pods widely spreading; stem usually sparingly branched near the
base (spring) =Rock Cress, Arabis dentata.=
61b. Pods erect or appressed; stem usually unbranched (summer) --62.
62a. Stem-leaves and stem smooth and glaucous
=Rock Cress, Arabis glabra.=
62b. Stem-leaves and stem almost always pubescent, and never
glaucous =Rock Cress, Arabis hirsuta.=
63a. Principal stem-leaves 7-10 cm. long, or more --64.
63b. Principal stem-leaves 2-5 cm. long --65.
64a. Leaves lanceolate or oblong; flowers 10 mm. wide or less (3-7
dm. high; summer) =Rock Cress, Arabis canadensis.=
64b. Leaves ovate or ovate-lanceolate; flowers 15-20 mm. wide (5-8
dm. high; late spring and summer)
=Dame's Rocket, Hesperis matronalis.=
65a. Basal leaves ovate to orbicular or cordate, not more than twice as
long as broad (1-3 dm. high; spring) (Bitter Cress) --66.
65b. Basal leaves oblong, lanceolate, or oblanceolate, at least 3 times
as long as broad (1-3 dm. high) --67.
66a. Flowers purple or rose color
=Bitter Cress, Cardamine douglassii.=
66b. Flowers white =Bitter Cress, Cardamine bulbosa.=
67a. Basal leaves pinnatifid (spring and summer)
=Rock Cress, Arabis lyrata.=
67b. Basal leaves entire or toothed --68.
68a. Leaves narrowly oblanceolate; rare plant occurring from
Mackinac northward (summer) =Rock Cress, Braya humilis.=
68b. Leaves obovate or oblong; an introduced weed (spring)
=Mouse-ear Cress, Sisymbrium thalianum.=
CAPPARIDACEAE, the Caper Family
Herbs, with alternate compound leaves, 4 petals, and 6 or more stamens,
which are about equal in length; fruit a 1-celled pod.
One species in Michigan, stamens about 11; leaflets 3 (2-4 dm. high;
flowers yellowish, in summer) =Clammy-weed, Polanisia graveolens.=
RESEDACEAE, the Mignonette Family
Herbs, with alternate leaves and terminal racemes of small yellowish
flowers; sepals 6, petals 6, stamens numerous.
One species in Michigan, with divided leaves and irregularly cleft
petals, blooming in summer =Yellow Mignonette, Reseda lutea.=
SARRACENIACEAE, the Pitcher Plant Family
Insectivorous plants, with hollow, pitcher-shaped leaves, and large
purple flowers at the ends of naked stems.
One species in Michigan, growing in bogs and blooming in late spring
=Pitcher Plant, Sarracenia purpurea.=
DROSERACEAE, the Sundew Family
Insectivorous herbs, with a rosette of basal leaves bearing gland-tipped
bristles on their upper surface, and with slender racemes of small white
flowers in summer; inhabitants of bogs and swamps (2 dm. high, or less).
Public-domain text, read in full here on John Shaqi.
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