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[ 26 ] The specimen communicated by Dr. Wislizenus, the only one found, was dead when it arrived here, but many fruits were adhering to the plant, and I was thus fortunate enough to cultivate it from the seeds.

Other remarkable cactaceae from the State of Chihuahua, which have been communicated to Dr. Wislizenus by Mr. Potts, of Chihuahua, are not described here, as it is believed that Mr. P. has sent them already to England, where, no doubt long before this, they have been published.

Amongst the other distinguished plants of Cosihuiriachi and Llanos, I cannot omit to mention a beautiful Delphinium, which grew abundantly here; a Silene, which is perhaps new, but comes near to S. multicaulis, Nutt., of the Rocky mountains, and S. Moçiniana, DC of Mexico; a new Bouvardia, which is remarkably distinct from all the other Mexican species of this genus by its smoothness; an Echeveria perhaps identical with the Californian E. caespitosa, DC; several Gerania, which appear to be undescribed, one of them with white flowers; an Eryngyum, with