Purple panic grass.

September 4.

Much rain, with thunder and lightning. 

September 4, 2018
(avesong)

Our large-fruited sparganium is evidently S. ramosum, still a little, at least, in flower. 

My large grass of the riverside with a narrow or spike-like appressed panicle, long since out, at the end of a long bare culm, leafy below, is apparently Phalaris arundinacea. 

Piper grass is apparently Triticum repens; now done.

What I called Panicum capillare (after Hoar, without examining) is P. sanguinale, crab grass, finger grass, or purple panic grass. Panicum capillare (very different and like Eragrostis capillaris, the fine purple grass) is now in prime in garden.

H. D. Thoreau, Journal, September 4, 1858

(Eragrostis capillaris, the fine purple grass) See August 13, 1860 ("Purple grass (Eragrostis pectinacca), two or three days. E. capillaris, say as much.")