The Plants of Michigan - BestLightNovel.com
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16b. Petals and sepals each 5 or more --17.
17a. Leaves with stipules =ROSACEAE=, p. 51.
17b. Leaves without stipules 23b, in =RANUNCULACEAE=, p. 37.
--18--
18a. Stem-leaves a single opposite pair (basal leaves may also be present) --19.
18b. Stem-leaves none --23.
19a. Leaves entire --20.
19b. Leaves toothed or lobed --21.
20a. Flowers solitary; leaves broadly kidney-shape =ARISTOLOCHIACEAE=, p. 25.
20b. Flowers in racemes; leaves linear or lanceolate =PORTULACACEAE=, p. 34.
21a. Flowers in racemes; petals deeply toothed 23b, in =SAXIFRAGACEAE=, p. 51.
21b. Flowers solitary or few in a cl.u.s.ter; petals entire or nearly so --22.
22a. Petals 5 =GERANIACEAE=, p. 64.
22b. Petals 6 or more 2b, in =BERBERIDACEAE=, p. 40.
23a. Flowers or flower-cl.u.s.ters sessile, at or partly beneath the surface of the ground 4a, in =ARACEAE=, p. 8.
23b. Flowers or flower-heads solitary at the ends of the flower-stalks --24.
23b. Flowers or flower-heads numerous or several on each flower-stalk --38.
24a. Flowers yellow --25.
24b. Flowers not yellow --29.
25a. Juice milky 16, in =COMPOSITAE=, p. 115.
25b. Juice not milky --26.
26a. Aquatic or mud plants, with large entire leaves 1-4 dm. wide =NYMPHAEACEAE=, p. 35.
26b. Land plants, with smaller or lobed leaves --27.
27a. Flower-stalk scaly 110, in =COMPOSITAE=, p. 122.
27b. Flower-stalk bare or with 1 to 2 minute bracts --28.
28a. Flowers regular 10, in =RANUNCULACEAE=, p. 36.
28b. Flowers irregular, with a spur 3a, in =VIOLACEAE=, p. 75.
29a. Flowers obviously irregular, with a spur --30.
29b. Flowers regular or nearly so, without a spur --31.
30a. Leaves sessile or nearly so; stamens 2 =LENTIBULARIACEAE=, p. 105.
30b. Leaves petioled; stamens 5 =VIOLACEAE=, p. 75.
31a. Flowers 3 mm. wide or smaller; leaves thread-like 16a, in =SCROPHULARIACEAE=, p. 103.
31b. Flowers 6 mm. wide or larger --32.
32a. Ovary 1 --33.
32b. Ovaries numerous --37.
33a. Leaves lobed or cleft --34.
33b. Leaves entire or toothed --35.
34a. Leaves deeply 2-cleft; stamens 8 3a, in =BERBERIDACEAE=, p. 40.
34b. Leaf 1, palmately lobed; stamens numerous 1a, in =PAPAVERACEAE=, p. 41.
35a. Flowers dull red =ARISTOLOCHIACEAE=, p. 25.
35b. Flowers white or pinkish --36.
36a. Leaves entire; stamens with good anthers 5 13, in =SAXIFRAGACEAE=, p. 50.
36b. Leaves minutely toothed; stamens 8-10 14a, in =ERICACEAE=, p. 85.
37a. Leaves lobed or divided =RANUNCULACEAE=, p. 35.
37b. Leaves crenate or toothed 64a, in =ROSACEAE=, p. 56.
--38--
38a. Flowers of the composite type, with several or many small flowerets closely aggregated into a dense head surrounded by a calyx-like involucre of small bracts 10, in =COMPOSITAE=. p. 114.
38b. Flowers separate; variously cl.u.s.tered, but never crowded into involucred heads --39.
39a. Flowers in dense close spikes --40.
39b. Flowers in open loose cl.u.s.ters --42.
