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  1. The vegetation of Texas : being the first of a series of brochures purposed to present the scientific scene with accuracy and interest
    1. The Vegetation of Texas

    2. The Vegetation of Texas

    3. Contents

    4. Illustrations

    5. Foreword

    6. Introduction

    7. Texas Vegetation

    8. Vegetatoinal Regions

    9. Region 1: Long-Leaf Pine

    10. Region 2: The Coastal Prairie

    11. Region 3: The Fayette Prairie

    12. Region 4: Mesquite-Chaparral

    13. Region 5: Coastal Sand Dunes

    14. Region 6: Oak-Hickory-Mesquite of the Central Texas Crystallines

    15. Region 7: The Edwards Plateau: Oak-Cedar

    16. Region 8: The Mountains

    17. Region 9: Live Oak-Mesquite Savanna

    18. Region 10: Sotol-Lechuguilla

    19. Region 11: The Sandy South Plains

    20. Region 12: THe High Plains

    21. Region 13: The Mesquite-Grassland

    22. Region 14: The Western Cross Timbers

    23. Region 15: The Eastern Cross Timbers

    24. Region 16: Oak-Hickory

    25. Region 17: The Pine-Oak Forest

    26. Region 18: The Blackland Prairie

    27. A Distribution List of the Principal Ferns and Seed Plants Occurring Native in Texas

    28. Ferns

    29. Seed Plants

    30. The editors asked Doctor Tharp to define ECOLOGY for them in a few words. This is his answer:

  2. Illustrations
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    2. Untitled

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    5. Untitled

    6. Long-leaf pine tapped for turpentine, which is extracted over a period of two or three years before the timber is cut. Region 1.

    7. Seedling long-leaf on cut-over forest. Note the rejected relict trees which have furnished the seed. Region 1.

    8. Salt grass on the coastal prairie. Low shrubs of huisache appear in front and rear of the figure. Region 2.

    9. Huajillo, prickly pear, blackbrush, and yucca in a typical chaparral mixture. Region 4.

    10. Looking across Green Gulch to Lost Mine Peak in the background, Chisos Mountains. The steep slope below the cliffs is covered with oak; the bunch growth in the foreground valley floor is slender bear grass and sotol. Region 8.

    11. Taken in Palo Pinto County, this mesquite-prickly pear grouping might be substantially duplicated in parts of regions 4, 6, 7, 9, 13, and 18.

    12. Mountain live oak; Davis Mountains. Region 8.

    13. Western yellow pine; Davis Mountains. Region 8.

    14. White sage and mesquite in deep sand near Monahans. Region 11.

    15. Bald cypress in Caddo Lake. Region 17.

    16. A small specimen of Ocotillo, a striking plant of Region 10.

    17. Slender bear grass and Yucca growing on an overgrazed, grama-grass valley; Brewster County. Region 10.

    18. A crust of salt in a broad zone around a salt lake near Brownfield. Note the vegetation at the margin. The briny liquid at the center of the lake was out of range to the right and does not show. Region 11.

    19. A pygmy forest of Havard's oak on sandy land, Hockley County. Region 11

    20. The oak-hickory forest just west of Texarkana. Region 16.

    21. Post oak in open stand near Refugio. Note the long festoons of Spanish moss. Region 16.

    22. Where the Western cross timbers meet the prairie in Parker County Regions 14 and 18.

    23. Untitled

50

Burmannia Family: burmanniaceae. The family is represented by a single collection of Burmannia capitata from a marsh in Gonzales County (16). The plants are very delicate, slender, and apparently leafless stalks with a few small, inconspicuous whitish flowers resembling those of a milk wort at the tip. It should be found in regions 1, 2 and 17.

Orchid Family: ORCHIDACEAE. Orchids are represented by a dozen genera and two or three times that many species. They are most abundant in 1, 2, 16, 17; but also present in almost every region. All are terrestrial and most commonly found in marshy or wet soil. The most widespread genus is Spiranthes, which is found in the whole southeastern half of the state. Other genera are Habenaria, Blephariglottis, Pogonia, Serapias, Peramium, Corallorhiza, Limodorum, Hexalectris, Stenorrhynchus.

Lizard's Tail Family: saururaceae.

LizardVtail (Saururus cernuus) is abundant in swampy situations 1, 2, 16, 17. The name comes from the slender, tapering, drooping inflorescence which is sometimes nearly a foot long.

Willow Family: salicaceae.

Willows {Salix spp.) occur in some half dozen species of which the Black Willow, S. nigra, is the most common. It is found on river banks almost throughout the state. The Sand-Bar Willow, S. luteosericea, is common on new dunes and bars along upper Red River and the Canadian. It is a densely growing shrub. Others occur in the extreme west and northwest.

Poplar (Populus spp.). Except the quaking aspen, P. tremuloides, found only 7 in protected mountain gulches at high altitudes (8), all species of poplar are commonly called Cottonwood. The most common and widespread is the Eastern Cottonwood, P. balsamifera var. virginiana, which occurs along streams in 1, 2, 3, 4, 6, 7, 9, 13, 15, 16, 17, 18. Some 4 other species are found northwestward of these regions but in Texas they are uncommon.

Myrtle Family: myricaceae.

Wax Myrtle (Myrica cerifera) grows as a shrub or small tree in 1, 2, 16, 17. On the coastal prairie it is very scrubby, propagating by thick rhizomes; in the sandy uplands of 1 and 17 it is a shrub 4 to 10 feet tall; along marsh edges in 16 it attains a height of 15 to 20 feet and a diameter of nearly a foot.

Cork-wood Family: leitneriaceae.

Corkwood (Leitneria floridana); so called because of the extreme light ness of the wood, is found in Region 2 as far southwest as the lower Brazos, but is nowhere abundant.

Walnut Family: juglandaceae. Walnuts are represented in regions 1, 16, 17 by Juglans nigra, the black walnut, and in 4, 5, 7, 8, 9, and 10 by /. rupestris.^ the small western walnut. The former is scattered sparsely on flood plains (creek and river bottoms); the latter is abundant in the

The Vegetation of Texas