The problem is you didn't show the leaves. You should be able to find out what it is from the Garden anyway, botanical gardens are supposed to be telling people what they are displaying. They might have a place on their web site where you can make queries about the collections, or a phone number you can call for information about specific accessions. Looks like this one is prominently situated. What I have seen here with a more or less similar trunk is Cydonia oblonga.

Thanks for your attention. I finally have some names for it. I researched some sites with info and photos. The Devil's Walking Stick wasn't the one because the spines on it seemed to go around tree in circles. With the Hercules Club I hit the jackpot. The tree was so covered with so much thorns it scared me just to look at it. I will post some other tree questions later. This is so much fun.

I think the one you have labelled as bunchberry is rue anemone- anemonella thalictroides, i believe. It's def not bunchberry. The thistles were the ones i didn't know- i thought the first one was crimson clover! The fern you don't have labelled looks like lady fern to me, but i'm no expert. The second photo looks like oxeye daisy to me. I'd like to know what the first shot is as i have this wildflower/weed in my garden. And i was tickled to see the ID on the yellow violet.

SCENIC PLANNER MAKES THE CASE AGAINST ALIENS June 11, 2009 (CHARLESTON, SC) -- If we fill our parks, lawns or scenic byways with non-native plant material, we might as well pave them over, according to planner Edwin Gardner of Heritage Strategy Group in Charleston, South Carolina. Gardner is an advocate of the concepts Douglas W. Tallamy discusses in his book 'Bringing Nature Home: How You Can Sustain Wildlife with Native Plants.' In a recent post to Heritage Strategy GroupÂs blog -- heritagestrategy.wordpress.com -- Gardner says he agrees with TallamyÂs central point 'that we owe it to the environment to plant only native species, which provide food for our increasingly beleaguered wildlife and avoid apocalyptic risks to the ecosystem.' What are native species? Gardner agrees with Tallamy who defines Ânative as 'having the ability to support a large number of insect and animal species.' Exotic plants brought from other countries that have been 'naturalized' here even for hundreds of years are not native, he insists, since they canÂt support native insect life. For example: 'Our North American caterpillars have not developed the ability to eat leaves of most alien plants,' Gardner says. While that may be music to the ears of nurseries and landscapers who seekout insect-resistant plant material, to the natural ecosystem chain, itÂs disastrous. 'In fact, the caterpillar is a most generous beast,' Gardner says. 'It provides food for most birds, especially during critical nesting periods, and forms the base of a food pyramid thatÂs critical to the whole ecosystem. A yard full of foreign nursery stock may look green and natural, but it might as well be paved with asphalt if youÂre a caterpillar, or an animal thatÂs looking to feed on one.' As a heritage planner, Edwin Gardner develops recreational areas and scenic byways so that growth and prosperity do not interfere with the cultural, historical and natural heritage of the effected areas. That mission drew him to Douglas TallamyÂs book. 'As we develop byway beautification plans or park management plans or anything that involves plantings in a developed area, we have a responsibility to urge that non-native species be eliminated and replaced with true native species,' he insists. Gardner cites several examples of 'environmental destruction wrought by alien organisms and invasive plants that were brought from overseas to beautify America.' To read the entire discussion, visit heritagestrategy.wordpress.com and click on ' A New Philosophy on Landscaping.' Here is a link that might be useful: Heritage Strategy Group's blog