In the photograph above, you can see numerous colors and textures indicative of a diverse array of plant species. In a few spots, including on the left side of the photo, you can see a bit of red coloration, which is a result of one of many dense colonies of Diamorpha smallii on the site. Elf Orpine, as it is known, has fleshy red leaves, a red stem, and pinkish-red fruit, and it grows in dense colonies. This tiny plant (only growing up to four inches tall) is only known from six states in the southeastern United States, where it grows in gravelly and sandy vernal pools in granite and sandstone outcrops and sandy flats.
The very similar Sedum pusillum, pictured below, also grows at this site, in populations that are geographically in close proximity to Diamorpha smallii but that are ecologically quite different. Whereas Diamorpha smallii grows in vernal pools, Sedum pusillum can be found in slightly drier parts of granite flatrocks under shade, often in association with Juniperus virginiana. Puck's Orpine, as this species is known, is only found in North Carolina, South Carolina, Alabama, and Georgia, and is a Federal Species of Concern. It flowers a bit earlier than Diamorpha smallii, and as a result many of the plants of this species that we saw had already matured to fruit.
In my previous post, I discussed Minuartia glabra. At Forty Acre Rock, the similar Minuartia uniflora was found on granite flatrocks. This tiny member of the family Caryophyllaceae, known as Piedmont Sandwort, is only known from North Carolina, South Carolina, Georgia and Alabama, where it grows in sandy or granite outcrops. As with nearly all of the other species growing on the outcrops at this site, Minuartia glabra is an annual.
Take a look at the shot below. What could Justin possibly be doing? Isn't he going to soil his Sunday best by tinkering on his tummy in that little puddle? Even if he did, it would be well worth it for the reward of the plant in the small vernal pool that is the object of his attention.
Probably the highlight plant of the trip for me was the tiny Pool Sprite that grows in these vernal pools at this preserve. Below is Amphianthus pusillus. It simply doesn't get much better than this, folks. The leaves of this plant are less than a half inch long, so you can get a feel for how small the flower is. This federally threatened species is endemic to the vernal pools in granite flatrocks in the piedmont of South Carolina, Georgia, and Alabama. Because these vernal pools are prone to rapid drying, this only member of the genus Amphianthus, an annual plant, conducts its entire life cycle in just three to four weeks. The other plant in the photograph below, by the way, is a quillwort, possibly (Isoetes melanospora).
After spending a good chunk of the day at this site, we drove to the coastal plain and botanized at Cartwheel Bay Heritage Preserve. Most of our time here was spent in the Longleaf Pine flatwoods, but we did venture into a couple of pocasins as well.
One of our highlights at this preserve was Carolina Ipecac, Euphorbia ipecacuanhae, shown below. This mat-forming euphorb is known primarily from the sandhills and coastal plain of several states along the east coast of the United States. The specific epithet gives you an idea of what would happen if you ate this plant... not only does it induce vomiting, but it also acts as a laxative. Don't try this at home... well, that may actually be the best place to try it, if you are so inclined.
Also at Cartwheel Bay, we saw the plant below. We originally identified this as Iris tridentata, but thanks to the keen eye of one of our readers we've learned that this identification was incorrect. Instead, we now believe that this is likely Iris virginica. However, there are two known varieties of this species present in South Carolina: I. virginica var. virginica and I. virginica var. shrevei. The former is said to get up to 6 dm tall and to not be very branched, whereas the latter is said to get up to 1 m tall and to be more branched. The plant that we saw with deep violet petals and sepals was at least 1m tall and was branched, indicating that it would be I. virginica var. shrevei. However, that variety is not known from the coastal plain of South Carolina or from Horry County, where we found this specimen.
As it began to get dark, a Barred Owl called, signaling the end to day two of our short three day sprint through South Carolina. After such a great day two, what would day three bring?
