Connecticut Botanical Society was "founded in 1903. This society is made up of amateur and professional botanists who share an interest in the plants and habitats of Connecticut and the surrounding region. Our goals are to increase knowledge of the state's flora, to accumulate a permanent botanical record, and to promote conservation and public awareness of the state's rich natural heritage."
Connecticut Gardener
A home-grown treasure for over 20 years. This journal is for anyone interested in native gardening in Connecticut and is also available for your perusal at the LuEsther T Mertz Library at the New York Botanical Garden.
As a member of the Connecticut Botanical Society you will receive their semi annual newsletter in the mail. See below for a sampling of articles on the flora of Connecticut.
The Birdfoot violet, Viola pedata, is a native plant found on the entire east coast--except Florida. Its leaves are shaped like birdfeet, hence the name.
Native Plant Garden : a showcase of the beautiful and diverse native plants of northeastern North America, featuring a mosaic of native trees, shrubs, wildflowers, ferns, and grasses flourishing in every season by 
Wildflowers of Massachusetts, Connecticut, and Rhode Island in Color by 
Native and naturalized vascular plants of Connecticut checklist by 
Connecticut trees & wildflowers : an introduction to familiar series by
Founded in 1864 by Daniel Cady Eaton from his personal library and plant collection, the Yale Herbarium is an internationally recognized repository with holdings of approximately 350,000 specimens from throughout the world. The Herbarium can be visited in person by qualified researchers or online by all. It is located at the Peabody Museum of Natural History in New Haven, Connecticut.