The vascular flora of Madison County, Texas

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references (leaves 80-83).Issued also on microfiche from Lange Micrographics.Vascular plants were collected in Madison County, Texas from 1996-2000 to create a vouchered record of species occurance, abundance, and habitat preference. Plants were collected from 233 sites in the county that are described by thirteen major vegetational habitats. These include three aquatic habitats, two riparian habitats, epiphytic and parasitic habitats, and six upland and lowland habitats divided into open, mixed, and wooded cover types. Three upland woods plant associations are described: Post Oak - Winged Elm - Yaupon, Blackjack Oak - Post Oak - Winged Elm, and Southern Red Oak - Sweet Gum - Post Oak. Unique habitats, including springs, pineywoods, and canyons are described. Typical species for all habitats are listed and appendices contain complete lists of taxa. The county supports ten species endemic to Texas, one of which is federally endangered. One species, Vicia lutea, was found to be new to Texas. The Madison County flora is comprised of 994 species in 469 genera and 121 families. The five largest plant families are Poaceae (134 species), Asteraceae (130 sp.), Fabaceae (strict sense) (74 sp.), Cyperaceae (63 sp.), and Euphorbiaceae (32 sp.). These families possess approximately 44% of the species collected in the county