Common Name(s): heart-leaf nettle; weak nettle; fireweed; ortiguilla. Family: Urticaceae (nettle family) Description. Annual herbs with stinging hairs. Stems erect but weak and often …

Herbaceous plants covered with stiff stinging hairs; palmately 3– to 5–lobed leaves, conspicuous tubular-based white flowers in a cluster terminating the stem; 3-parted bristly capsule with 3 …

2019年3月1日 · The stinging and itching is caused by the hairs with toxins that break off the plant and embed in your skin. The toxins create the burning sensation or contact dermatitis that can …

stinging hairs; opposite triangular leaves with scalloped-toothed margins; minute flowers in spherical clusters in leaf axils. (Fig. 2). It blooms from spring to summer in Florida. Distribution. …

The unrelated Cnidoscolus stimulosus (bull-nettle, stinging-nettle, tread-softly, finger-rot, Figure 6; Euphorbiaceae, spurge family), a common Florida plant, also has stinging hairs but is …

STINGING NETTLE: Plant Notes: The neurotransmitters acetylcholine, histamine, and serotonin have been identified in this plant and are likely involved in part of the irritating sensation (Fu et …

Urtica urensL., burning nettle or dwarf nettle, is native to Europe and in Florida is found in cultivated fields and dis-turbed sites (Wunderlin 1998). Wunderlin lists it for three counties in …

Common Names: Tread Softly, Treadsoftly, Spurge Nettle, Stinging Nettle, Bull-nettle, Finger-rot Photos. Click on each picture to display the larger, higher-resolution image. All photographs …

What we called "stinging nettles" were the bane of my childhood in northern Florida, but they aren't nettles of the urtica genus. They are actually Cnidoscolus stimulosus, or bullnettle, …

Stinging Nettle is a perennial native that blooms year round here in Florida. The plant is covered in stinging hairs that release a caustic irritant. The leaf of Stinging Nettle resembles that of the …