I am lazy in traveling, or I would have written you. Then I have been pretty busy, too, and have done several hard days’ work, causing much but healthy fatigue.
Cambridge, May 8.
We are at home, with delightful memories of you and yours.
I think I hinted to you that I found two Crassulaceæ on Stone Mountain, both annual.
One, most abundant on the lower slopes, is glaucous-green, and has bright white flowers. The pods show it to be a true Sedum. I send a small specimen. Note the blunt pods and short style. This—as shown by a bit of fruit in my herbarium—is Sedum pusillum, Michx.!
The other is dull purple in general hue, smaller, grows only well up the mountain, abounds in a small form on the very top, and is rather later; but I make out the dehiscence, and it is Diamorpha pusilla, Nutt.!
The specimens you sent to me are this, larger and later than any I got. But, as you directed me to the base of the mountain for Diamorpha, you must have got this too. Your specimens have full-grown fruit. Look at them and see if the larger ones have not the regular dehiscence down the side of Sedum, and let me know.
May 12, 1875.
Thanks for your letter and the Sedum.
Now for another find. The moment I set eyes on the Arenaria of Stone Mountain, I said, Ho! here is A. brevifolia, Nuttall, of which I had only a single stalk in herbarium. Comparing now, I was right, and Nuttall says his specimen is from Tatnall County (which is strange, that being in southeast Georgia). The question remains, Is it only a low-country form of Arenaria glabra?