cover

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front matter

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copyright

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Contents

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p. vii

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Acknowledgments

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p. ix

This book is the result of the generosity, cooperation, and encouragement of a large number of people. Identification of difficult species was provided by Dr. Tom Wendt, Dr. Paul Fryxell, Ann Vacek, Dr. Billie Turner, Dr. David Austin, Dr. David Rosen, Dr. Robert Lonard, Dr. William Ocumpaugh, and Dr. Andrew McDonald. ...

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Introduction

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pp. 1-8

The purpose of this book is to provide, through pictures and short descriptions, a simple means of identifying plants that grow naturally in Cameron, Hidalgo, Willacy, and Starr counties, known locally as the Lower Rio Grande Valley. This includes native plants, ...

Plant Species Accounts

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Algae

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p. 11

Stonewort, Brittlewort, Muskgrass Family: Characeae Scientific Name: Chara sp. Habit: Small malodorous aquatic plants lacking specialized conducting tissue, growing on the bottoms of ponds. Leaves: None. Flowers: None. The tiny reproductive organs appear as tiny knots on the “stems." ...

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Ferns

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pp. 12-13

Carolina Water Fern Family: Azollaceae Scientific Name: Azolla caroliniana Habit: Tiny floating plants about 3∕8" or less in diameter. Leaves: Folded, notched at the fold, less than 3/16 " long, with microscopic barbed hairs, red if in full sun. Flowers: None Fruit: None. Sporocarps on the lower leaf surface produce sporangia. Spores are produced within the sporangia. ...

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Gymnosperms

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pp. 14-15

Erect Joint Fir, Mormon Tea Family: Ephedraceae Scientific Name: Ephedra antisiphylitica Habit: Erect shrubs up to 40" tall, appearing to be leafless. Leaves: Scalelike, in pairs, about 1∕8" long. Flowers: None. Separate male and female cones are produced on different plants. Fruit: Seeds are produced in the female cones, ...

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Monocots (Monocotyledoneae)

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pp. 16-47

Century Plant Family: Agavaceae (Amaryllidaceae) Scientific Name: Agave americana Habit: Leaves large and succulent, crowded in a tight spiral; stems not visible. Leaves: Stiff, gray or whitish, waxy, up to 5 1∕2' long, crowded in a tight spiral, hiding the stems; margins and leaf tips with sharp spines. Flowers: Greenish, on inflorescences over 20' tall. Fruit: Dehiscent, Splitting into 3 parts. Bloom Period: Summer. The inflorescence appears after the plant is several years old, an ...

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Dicots (Dicotyledoneae)

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pp. 48-427

Small Flowered Wrightwort Family: Acanthaceae Scientific Name: Carlowrightia parviflora Habit: Creeping to erect subshrubs, up to 20" tall, forming colonies. Leaves: Opposite. Petioles short or absent; blades lanceolate, up to 1 5∕8" long and 1∕2" broad. Flowers: Blue, bilateral, 4-lobed, with a narrow tube, 1∕4" or slightly longer. Anthers 2. Fruit: a 1∕8"capsule with 4 seeds. Bloom Period: Fall, winter, spring. ...

Appendix: Butterflies and Moths

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pp. 429-430

Glossary

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pp. 431-434

Bibliography

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pp. 435-438

index

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pp. 439-457