=ROSACEAE=, p. 51.

223b. Leaves without stipules --224.

224a. Leaves toothed, deeply lobed, or compound
=RANUNCULACEAE=, p. 35.

224b. Leaves entire --225.

225a. Ovaries numerous =RANUNCULACEAE=, p. 35.

225b. Ovary 1 --226.

226a. Sepals 2 =PORTULACACEAE=, p. 34.

226b. Sepals 3 or 5 =CISTACEAE=, p. 74.

--227--

227a. Leaves entire =LYTHRACEAE=, p. 77.

227b. Leaves lobed, divided, dissected, or compound --228.

228a. Flowers in slender racemes =RESEDACEAE=, p. 48.

228b. Flowers solitary or clustered, but not in slender racemes
--229.

229a. Stamens 6 3b, in =BERBERIDACEAE=, p. 40.

229b. Stamens numerous =RANUNCULACEAE=, p. 35.

[1] In most flowers the corolla is the conspicuous portion of
the perianth, and is composed of united or separate petals, as the case
may be. In some flowers the corolla is absent, and the calyx is the
conspicuous portion.

THE PLANTS OF MICHIGAN

PINACEAE, the Pine Family

Trees or shrubs, usually evergreen, with needle-like or scale-like
leaves; fruit a cone or berry.

1a. Leaves in clusters of 2-5 --2.

1b. Leaves mostly in clusters of 10 or more, on short lateral wart-like
branches, deciduous each autumn =Tamarack, Larix laricina.=

1c. Leaves not in clusters --4.

2a. Leaves in clusters of 5 =White Pine, Pinus strobus.=

2b. Leaves in clusters of 2 or 3 --3.

3a. Leaves 8-15 cm. long =Norway Pine, Pinus resinosa.=

3b. Leaves 2-4 cm. long =Jack Pine, Pinus banksiana.=

4a. Leaves alternate or scattered --5.

4b. Leaves opposite or whorled --8.

5a. Leaves four-sided --6.

5b. Leaves flattened --7.

6a. Leaves 6-12 mm. long =Black Spruce, Picea mariana.=

6b. Leaves 15-25 mm. long =White Spruce, Picea canadensis.=

7a. Leaves short-stalked, 15 mm. long or less
=Hemlock, Tsuga canadensis.=

7b. Leaves sessile, 15-30 mm. long =Balsam, Abies balsamea.=

8a. Leafy twigs soft and flattened
=White Cedar, Thuja occidentalis.=