LightNovesOnl.com

Michigan Trees Part 6

Michigan Trees - LightNovelsOnl.com

You're reading novel online at LightNovelsOnl.com. Please use the follow button to get notifications about your favorite novels and its latest chapters so you can come back anytime and won't miss anything.

2. Leaf, 1/2.

3. Staminate flowering branchlet, 1/2.

4. Staminate flower, enlarged.

5. Pistillate flower, enlarged.

6. Fruit, 1.]

+GINKGOACEAE+

+Ginkgo.[C] Maidenhair Tree+

_Ginkgo biloba L._ [_Salisburia adiantifolia Smith_]

HABIT.--A slender tree in youth, with slender, upright branches, becoming broader with age and forming a symmetrical, pyramidal crown; probably 60-80 feet high, with a trunk diameter of 2-4 feet.

LEAVES.--Cl.u.s.tered at the ends of short, spur-like shoots, or scattered alternately on the long terminal branches; simple; 2-5 inches broad; more or less fan-shaped; usually bilobed and irregularly crenate at the upper extremity; thin and leathery; glabrous, pale yellow-green on both sides; petioles long, slender; turning a clear, golden yellow before falling in autumn.

FLOWERS.--May, with the leaves; dioecious; the staminate in short-stalked, pendulous catkins, 1 to 1-1/2 inches long, yellow; the pistillate more or less erect on the shoot, long-stalked, consisting of 2 naked ovules, one of which usually aborts.

FRUIT.--Autumn; a more or less globose drupe, orange-yellow to green, about 1 inch in diameter, consisting of an acrid, foul-smelling pulp inclosing a smooth, whitish, somewhat flattened, almond-flavored nut.

WINTER-BUDS.--Terminal bud about 1/8 inch long, conical, smooth, light chestnut-brown; lateral buds divergent, usually only on rapid-growing shoots.

BARK.--Twigs gray-brown and smooth; thick, ash-gray and somewhat roughened on the trunk, becoming more or less fissured in old age.

WOOD.--Light, soft, weak, close-grained, yellow-white to light red-brown, with thin, lighter colored sapwood.

NOTES.--Origin in dispute, but probably a native of northern China.

Extensively cultivated in China and j.a.pan, where its fruit is esteemed.

Easily propagated from seed. Thrives in deep, well-drained, rich soil.

Practically free from insect and fungous attacks, and little harmed by the smoke of cities. Probably hardy throughout the southern half of the Lower Peninsula.

+SUMMER KEY TO THE SPECIES OF PINUS+

a. Leaves 5 in a cl.u.s.ter; cones 4-10 inches long. _P.

strobus_, p. 7.

aa. Leaves 2 in a cl.u.s.ter; cones less than 4 inches long.

b. Leaves 1-3 inches long.

c. Leaves about 1 inch long, divergent; cones sessile, pointing forward towards the tip of the branch, persistent 10-15 years, opening very unevenly. _P. banksiana_, p. 9.

cc. Leaves 1-1/2-3 inches long, slightly divergent; cones stout-stalked, pointing away from the tip of the branch, maturing in second season, opening evenly. _P. sylvestris_, p.

13.

bb. Leaves 3-6 inches long.

c. Bark of trunk red-brown; cones maturing in second season, about 2 inches long; cone-scales thickened at the apex, but unarmed. _P. resinosa_, p. 15.

cc. Bark of trunk gray to nearly black; cones maturing in first season, 2-3 inches long; cone-scales thickened at the apex and topped with a short spine. _P. laricio austriaca_, p.

11.

+WINTER KEY TO THE SPECIES OF PINUS+

a. Leaves 5 in a cl.u.s.ter; cones 4-10 inches long. _P. strobus_, p. 7.

aa. Leaves 2 in a cl.u.s.ter; cones less than 4 inches long.

b. Leaves 1-3 inches long.

c. Leaves about 1 inch long, divergent; cones sessile, pointing forward towards the tip of the branch, persistent 10-15 years, opening very unevenly. _P. banksiana_, p. 9.

cc. Leaves 1-1/2-3 inches long, slightly divergent; cones stout-stalked, pointing away from the tip of the branch, maturing in second season, opening evenly. _P. sylvestris_, p.

13.

bb. Leaves 3-6 inches long.

c. Bark of trunk red-brown; cones maturing in second season, about 2 inches long; cone-scales thickened at the apex, but unarmed. _P. resinosa_, p. 15.

cc. Bark of trunk gray to nearly black; cones maturing in first season, 2-3 inches long; cone-scales thickened at the apex and topped with a short spine. _P. laricio austriaca_, p.

11.

[Ill.u.s.tration: +White Pine+

1. Cl.u.s.ter of leaves, 1.

2. Cross-sections of leaves, enlarged.

3. Partly opened cone, 3/4.

4. Cone-scale with seeds, 1.]

+PINACEAE+

+White Pine+

_Pinus strobus L._

HABIT.--A large tree 60-80 feet high, with a trunk diameter of 2-4 feet; forming a wide, pyramidal crown. Formerly trees 100-150 feet in height and 5-7 feet in trunk diameter were not exceptional.

LEAVES.--In cl.u.s.ters of five; 3-5 inches long; slender, straight, needle-shaped, 3-sided, mucronate; pale blue-green. Persistent about 2 years.

FLOWERS.--June; monoecious; the staminate oval, light brown, about 1/3 inch long, surrounded by 6-8 involucral bracts; the pistillate cylindrical, about 1/4 inch long, pinkish purple, long-stalked.

FRUIT.--Autumn of second season, falling during the winter and succeeding spring; pendent, short-stalked, narrow-cylindrical, often curved, greenish cones, 4-10 inches long; scales rather loose, slightly thickened at the apex; seeds red-brown, 1/4 inch long, with wings 1 inch long.

WINTER-BUDS.--Oblong-ovoid, sharp-pointed, yellow-brown, 1/4-1/2 inch long.

Click Like and comment to support us!

RECENTLY UPDATED NOVELS

About Michigan Trees Part 6 novel

You're reading Michigan Trees by Author(s): Charles Herbert Otis. This novel has been translated and updated at LightNovelsOnl.com and has already 604 views. And it would be great if you choose to read and follow your favorite novel on our website. We promise you that we'll bring you the latest novels, a novel list updates everyday and free. LightNovelsOnl.com is a very smart website for reading novels online, friendly on mobile. If you have any questions, please do not hesitate to contact us at [email protected] or just simply leave your comment so we'll know how to make you happy.