Seed Plants, Ferns, Fern Allies of the Austin Region 97 



Spiderwort 16 



Spigelia Lindheimeri Gray 59 



Spiny Amaranth 26 



Spiranthes, Gyrostachys 20 



Spleen Wort 5 



Sporobolus vaginaeflorus Torr 11 



Spotted Spurge 44 



Spring Beauty 27 



Spurge 46 



Spurge 44 



Spurge Nettle 44 



Squaw-weed 85 



Stachys agraria Cham, and Schl 70 



Standing Cypress 63 



St Andrew's Cross 51 



Star Cucumber 76 



Star Thistle 86 



Starwort 28 



Stellaria media Smith 28 



Stellaria prastrata Baldw 28 



Sticktight 39 



Stillingia linearifolia Kl. and Garcke 46 



Stipa leucotricha Trin 12 



Stonecrop 34 



Stork's Bill 41 



Stramonium 64 



Streptanthus bracteatus A. Gray.... 33 



Streptanthus platycarpus A. Gray. . 33 



Stretchberry 19 



Styrax platani folia Engelm 59 



Sugarberry 66 



Sumac 47 



Supple- Jack 48 



Svida asperifolia Small 56 



Swamp Ash 59 



Sweet Clover 39 



Sycamore 34 



Symphoricarpos 74 



Syntherisma sanguinale Dulac 11 



Talinum aurantiacum Engelm 28 



Talinum parviflorum Nutt 28 



Taraxacum Taraxacum Karst 87 



Tasajillo 53 



Taxodium distichum L. C. Rich. ... 7 



Tecoma radicans DC 72 



Tetragonotheca texana Gray & Engl. 83 



Tetraneuris linearifolia Green 85 



Tetraneuris linearis Green 85 



Teucrium canadense L 70 



Texas Ash 59 



Texas Buckeye 48 



Texas Buckthorn 49 



Texas Millet 11 



Texas Star 60 



Texas Star 82 



Thamnosma texana Torr 42 



Thelesperma sub simplici folium Gray 83 



Thelesperma trifidum Britton 83 



Thorn Apple 64 



Thoroughwort 77 



Three-seeded Mercury 43 



Thymophylla pentachaeta Small 85 



Thyrsanthema nutans Kuntze 86 



Tickseed 81 



Tick Trefoil 39 



Tillaea Drummondii T. and G 34 



Tillandsia recur vata L 17 



Tillandsia usneoides L 17 



Tilleastrum Drummondii Britton.... 34 



Tiniaria convolvulus Webb and Moq. 24 



Tithymalus arkansanus Kl. & Garcke 46 



Tithymalus commutatus Kl. & Garcke 45 



Tithymalus longicuris Small 46 



Tithymalus missouriensis Small 46 



Tithymalus roemerianus Small 45 



Toad Flax 70 



Toothache Tree ■ 42 



Toothed Medic 39 



Toothed Spurge 45 



Torilis nodosa Gaertn 57 



Torrey's Nightshade 65 



Toxicoscordion Nuttalii Rydb 17 



Toxylon pomiforum Raf 23 



Tradescantia 17 



Tradescantia gigantia Rose 16 



Tradescantia occidentalis Brit 16 



Tragia nepetaefolia Cav 46 



Tragia ramosa Torr 46 



Tread Softly 65 



Tree-of -Heaven 43 



Tribulus terestris L 42 



Tricuspis albescens Munro 14 



Tridens albescens W. and S 14 



Tridens muticus Nash 14 



Trifolium carolinianum Michx 40 



Triodia albescens Bent 14 



Trisetum interruptum, Buckl 12 



Trumpet Creeper 72 



Tumble Weed 25 



Typha latifolia L 8 



Umbrella-wort 27 



Ulmus alata Michx 23 



Ulmus americana L 23 



Ulmus crassifolia Nutt 23 



Ungnadia speciosa Endl 48 



Unicorn Plant 72 



Uniola latifolia Michx 14 



Urtica chamaedryoides Pursh 23 



Utricularia subulata L 72 



Valerianella amarella Krok 75 



Valerianella radiata Dupr 75 



Venus' Looking-glass 76 



Verbascum Thapsus L. Muhein 72 



Verbena bipinnatigda Nutt 67 



Verbena canescens H.B.K 67 



Verbena ciliata Benth 67 



Verbena officinalis L 67 



Verbena pumila Rydb 67 



Verbesina encelioides Benth. & Hook 83 



Verbesinet virginica L 83 



Vernonia Baldwinii Torr 77 



Veronica peregrina L 71 



Vervain L.... 67 



Vetch 40 



Viburnum prunifolium L 74 



Viburnum rufotomentasum Small .... 75 



Vicia Leavenworthii T. and G 40 



Viguiera helianthoides H.B.K 83 



Vincetoxicum biflorum Heller 61 



Vincetoxicum reticulatum Heller 61 



Viola missouriensis Green 52 



Viorna coccinea Small 30 



Viorna reticulata Small 30 



Virgin's Bower 29 



Virginia Rock Cress 31 



Vitex Agnus-castus L 67 



Vitis candicans Engelm 49 



Vitis cinerea Engelm 50 



Vilis cordifolia Lam 50 



Virginia Creeper 49 



Violet Wood Sorrel 41 



Water Cress 83 



Water Pimpernel 58 



Water Milfoil 55 



Water Starwort 47 



Water Willow 71 



Wahoo 23 



Water Fern 6 



Western Ragweed 76 



White-brush 66 



