The Plants of Michigan - LightNovelsOnl.com
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25b. All flowers of the cl.u.s.ter alike --26.
26a. Leaves finely serrate; the veins not prominent --27.
26b. Leaves coa.r.s.ely serrate, all or most of the teeth terminating in a prominent vein --29.
27a. Peduncle of the flower-cl.u.s.ter, below its branches, at least 2 cm.
long (1-3 m. high) =Withe-rod, Viburnum ca.s.sinoides.=
27b. Peduncle of the cl.u.s.ter 1 cm. long, or even shorter (3-8 m. high) --28.
28a. Leaves distinctly ac.u.minate =Sheep-berry, Viburnum lentago.=
28b. Leaves obtuse or barely acute =Black Haw, Viburnum prunifolium.=
29a. Leaves densely p.u.b.escent beneath (6-15 dm. high) =Arrow-wood, Viburnum p.u.b.escens.=
29b. Leaves glabrous beneath, or with tufts of hairs in the forks of the veins (1-4 m. high) =Arrow-wood, Viburnum dentatum.=
VALERIANACEAE, the Valerian Family
Herbs with opposite leaves and small nearly or quite regular flowers; petals 5, united; stamens 3; sepals minute or wanting; ovary inferior.
1a. Stem-leaves pinnately cleft (3-10 dm. high; flowers white or pinkish, summer) --2.
1b. Stem-leaves entire or dentate (2-6 dm. high; flowers white, summer) (Corn Salad) --3.
2a. Leaf-segments parallel-veined Valerian, Valeriana edulis.
2b. Leaf-segments net-veined =Swamp Valerian, Valeriana uliginosa.=
3a. Upper stem-leaves entire =Corn Salad, Valerianella chenopodifolia.=
3b. Upper stem-leaves dentate =Corn Salad, Valerianella radiata.=
DIPSACACEAE, the Teasel Family
Herbs with opposite leaves, and small pale blue flowers aggregated in dense heads; calyx minute; petals 4, united; stamens 4, attached to the corolla; ovary inferior.
One species in Michigan, 1-2 m. high, with p.r.i.c.kly leaves and stem, blooming in summer =Teasel, Dipsacus sylvestris.=
CUCURBITACEAE, the Gourd Family
Herbs, climbing by tendrils, with alternate palmately lobed leaves and imperfect flowers; staminate flowers in showy cl.u.s.ters, with 5-6 petals and 3 stamens; pistillate flowers small.
1a. Leaves 5-angled or shallowy 5-lobed (flowers white, summer) =Bur Cuc.u.mber, Sicyos angulatus.=
1b. Leaves 5-lobed to about the middle (commonly cultivated and frequently wild; flowers white, summer) =Wild Cuc.u.mber, Echinocystis lobata.=
CAMPANULACEAE, the Bellflower Family
Herbs with alternate simple leaves and milky juice; sepals 5; petals 5, united; stamens 5, attached at the very base of the corolla; ovary inferior.
1a. Stem-leaves circular or nearly so, cordate-clasping at base (2-6 dm.
high; flowers blue, axillary, in summer) =Venus' Looking-Gla.s.s, Specularia perfoliata.=
1b. Stem-leaves linear or nearly so, not over 1 cm. wide (summer) --2.
1c. Stem-leaves ovate to lanceolate, 2 cm. wide or more (flowers blue, in a terminal spike or raceme, summer) (Bellflower) --4.
2a. Stem and leaves glabrous (or rarely p.u.b.escent) (1-6 dm. high; flowers blue) =Harebell, Campanula rotundifolia.=
2b. Stem and leaves rough with reflexed bristles (marsh plants, with weak slender stems 3-10 dm. long; flowers white or pale-blue) (Marsh Bellflower) --3.
3a. Corolla 5-8 mm. long =Marsh Bellflower, Campanula aparinoides.=
3b. Corolla 10-12 mm. long =Marsh Bellflower, Campanula uliginosa.=
4a. Corolla rotate; flowers in spikes (6-15 dm. high) =Bellflower, Campanula americana.=
4b. Corolla bell-shape; flowers in one-sided racemes (4-10 dm.
high) =Bellflower, Campanula rapunculoides.=
LOBELIACEAE, the Lobelia Family
Herbs with alternate simple leaves and milky juice; flowers irregular; petals 5, united; corolla split down the upper side; stamens 5, united by their anthers into a ring or tube surrounding the style; ovary 2-celled, inferior. Flowers in summer and autumn.
1a. Leaves all basal, tubular; flowers on leafless stalks (aquatic, 1-4 dm. high; flowers blue) =Water Lobelia, Lobelia dortmanna.=
1b. Leaves normal, on the stem --2.
