Invasive: Lemon balm (Melissa officinalis) Characteristics:  Lemon balm is a fast-spreading, perennial member of the mint family. Like many mints, this one has hairy, square stems and a strong scent […]

Subject: Purple deadnettle (Lamium purpureum) Description: Purple deadnettle–and its look-alike relative, henbit (L. amplexicaule)–are short (usually less than 1′, or 30 cm), annual members of the mint family. Why “dead

Invasive: Hairy bittercress (Cardamine hirsuta) Video field exploration This month’s weed is less of a threat to natural areas than many featured weeds–though it does show up there–but is one

Invasive:  Mole Plant (Euphorbia lathyrus) Characteristics:  Mole plant—a.k.a. gopher spurge or caper spurge—is an erect biennial (occasionally annual) herb, native to the Mediterranean region and eastward to western China.  It

Invasive:  Scotch broom (Cytisus scoparius) Characteristics:  Scotch broom is a perennial member of the pea family (Fabaceae).  It is a deciduous shrub, 1-3 m (3 to 10 ft) tall, though