Verbena hastata, I believe. Here is a link that might be useful: Verbena hastata

I posted on your Plant ID forum thread; here is my reply. http://forums2.gardenweb.com/forums/load/namegal/msg0121502231960.html?15 That's probably Red Mulberry (Morus rubra) given the very limited information provided. wgreenlee1 could assist by saying WHERE these plants are growing. From your post here on Trees, I'm going to surmise Missouri - where Red Mulberry would be perfectly at home. I am pretty sure that there are no Tilia sp. with this kind of bark characteristics. It doesn't fit any of the birches either. Not even close on poplar or cottonwood (Populus sp.). Since these plants have been observed by you over a long period of time, I'm certain you would have observed Tilia flowers in passing. You should have seen Mulberry flowers, too - whether male or female. This tree is plenty old to have flowered. Those leaves look large enough, within the range of morphology, and appear coarse enough (along with the written description) to fit right in with Red Mulberry. Lobed leaves are just one expression of Mulberry species leaves, but not the only expression. Your location is significant in answering your question, and additional images of the dormant features like buds, stems, and - be still my heart - the WHOLE tree, make a huge difference in offering lucid opinions to the identity of this tree. Here's an old Red Mulberry trunk for comparison.

Some fantastic shots of various shrubby Aloes. I don't know that I would consider all of them within the "tree aloe" category from a landscape design point of view, but it is an arbitrary division in any case. Are most of these photos from plants at the Huntington or LA County Botanic Gardens? Some truly incredible photos, and few of these would ever be seen in such vigor and size up here, with the exception of the Ruth Bancroft Garden in Walnut Creek and the UC Berkeley Botanic Garden. I still suspect that the cuttings taken back to Texas are mostly likely smaller leaved side shoots from Aloe arborescens, unless your son had access to a collector's garden. A. arborescens is THE most common larger aloe here in the SF Bay Area. While the species grows over much of South Africa and no doubt has wide tolerance for different conditions, I don't think it is likely successful anywhere it regularly drops below 25F each winter for several days, or where the summer nights are hot and steamy and don't cool off. Is anyone here growing this successfully in Texas or south Florida? Also, being a winter bloomer, flowers can freeze even when the foliage resists; and this isn't a particularly attractive foliage aloe to grow for form/texture alone. Of the other Aloes in the photos, the ones I've seen most commonly and/or grown in gardens include speciosa, pluridens, ferox, castanea, africana, arborescens, thraskii, marlothii, x spinossimus to list a few. Here's some photos of them in SF Bay Area gardens: Here is a link that might be useful: Aloes in the East Bay Area

If you are to the northwest of San Antonio along I-10, such as Boerne or Kerrville, there is almost a certainty it is var Alba. I got mine from the late Carroll Abbott of Kerrville, who collected Texas wildflowers and initiated the wildflower movement in that part of Texas with his newsletter. He also had a backyard nursery and sold in that area as well. He, Lynn Lowry, Benny Simpson, and Barton Warnock pretty much covered southern Texas and adjacent Mexico in the 70s and 80s looking for Salvias and other horticulturally valuable plants.