Thanks for the copy of Orchids.

At Asa Gray’s request, writes what he knows about Pontederia cordata.

Thanks DN for references.

The Apocyanaceae that catch Lepidoptera represent the most gratuitous case of cruelty in nature known to CD, since the captured butterfly is of no use to the plant.

Reply to CD’s note ["Holly berries", Collected papers 2: 189–90] from a beekeeper: attributes the scarcity of bees to the harshness of weather in preceding spring.