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A flora of southern Illinois by Robert H. Mohlenbrock, John W. Voigt

By Robert H. Mohlenbrock, John W. Voigt

This publication could be of specific curiosity to these inter­ested in utilized fields of biology, comparable to conservation, forestry, and wild lifestyles. The southern twelve counties of Illinois, a complete of 4,355 sq. miles, include the world coated during this ebook. it really is a space during which either northern and southern plants specimens abound. a large choice of plant species develop during this sector, and approximately 2 hundred new crops no longer previously pointed out with this region were incorporated within the listings. Especially worthy to novice botanists, the e-book is a crucial guide in determining the crops that make up the local surroundings of this zone. Seventy-seven illustrations relief in selecting and figuring out the plant groups.

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Phytolaccaceae 16. Sepals absent; stamens 6; plants of swampy places 32. Saururaceae 2. Petals fused 23 23. Flowers irregular 24 24. Flowers pipe-shaped, or calyx tube 3- to 6-lobed, Page 36 adnate to the ovary; petals none 43. Aristolochiaceae 24. Flowers not pipe-shaped 25 25. Flowers blue or purple 26 26. Corolla purple; stamens 4; fruit 10 to 15 cm. long, curved, splitting at maturity into 2 divergent horns 135. Martyniaceae 26. Corolla blue; petals in corolla 2 plus 3; sepals 5; locules 2 140.

These rivers also mark the eastern and western borders respectively. The northern boundary is a line running from northwestern Randolph County eastward along the 38th parallel. The Southern Illinois area comprises 4,355 square miles which is about equal to that of the state of Connecticut (4,965 square miles). This twelve-county area has three neighboring states at its borders and is within one hundred miles of five states. This location is most favorable to floristic richness since some of these states are southern and the area is between or at the convergence of several important migration routes.

Verbenaceae 11. Plants with round stems 18 18. Ovary inferior 19 19. Flowers irregular or nearly regular; inflorescence small, or 2-flowered cymes; sepals 5; Page 30 petals 5, united; stamens 5; ovary 2-carpellate 138. Caprifoliaceae 19. Flowers regular, not as above 20 20. Flowers not in heads 21 21. Flowers in corymbs or very short paniculate cymes; stamens 1 to 4; ovary 1- to 3-loculed Valerianella in 141. Valerianaceae 21. Flowers not in corymbs or paniculate cymes 22 22. Flowers in terminal and axillary cymes; stamens as many as the petals; ovary 2-carpellate 137.

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