identification - What is this plant with spikes on its stem and

The attached photo of a weed or plant is one of two that is growing in the spare ground beside our house.We have lived here for 33 years and this has never appeared before. It has spikes on the ste

Plant ID Ornamentals Bougainvillea - Florida Master Gardener

Plants - Fort Pulaski National Monument (U.S. National Park Service)

Wilderness Toxins: Can You Identify the Poison? EMRA

Grow a guard dog in your garden with a thorny shrub or tree

How to Identify Poison Ivy: 9 Steps (with Pictures) - wikiHow

Plant Structures Biology for Majors II

A thorn by any other name

Thorns, spines, and prickles - Wikipedia

Armed by Nature: Thorns, Spines, and Prickles

How to Grow and Care for Crown of Thorns (Euphorbia milii)

Spines, Thorns, and Prickles

Can you ID? Spikey plant with tall central flower stem.

identification - What is this plant with long thin leaves with

Orchid Growing: A Spike or A Root? - Akatsuka Orchid Gardens