Plante Lindheimeriane. 195 
little longer than the calyx-tube, three-cleft at the apex ; 
stigmas fleshy, dilated, granulose-fimbriolate. Ovary three- 
celled, many ovuled. Berry, pulpy, ‘‘deep red when ripe, 
an inch or more in diameter,’ globose, ripening few seeds. 
Seeds 3 lines long, roundish-oval, turgidly lenticular. — Si- 
cydium was founded by Schlechtendal on a small-flowered 
Mexican dicecious plant, of which the sterile flowers alone are 
known. Until the fruit of that plant is identified it must 
remain doubtful whether ours belongs to the same genus. 
This has larger blossoms, and a more elongated calyx. But it 
accords with Schlechtendal’s incomplete description in being 
dicecious, in the 5-petalous corolla, and in the three distinct 
stamens with straight anther-cells. The leaves vary in the 
depth and breadth of their lobes. From the Rio Grande, 
Mr. Wright has communicated fragmentary specimens of 
what is probably a variety of the same species, with the 
leaves dissected into linear or filiform lobes and segments. 
Cactacez; by Dr. Engelmann. 
*,* Mr. Lindheimer has again sent many living specimens of Cactaceze from 
New Braunfels, San Antonio, the Pierdenales, and the Liano. Among them I not 
only recognized all the species described in Plant. Lindh. (Boston Journal, Vol. V.) 
but found also a number of new forms. From other sources I have obtained other 
species from the lower Rio Grande. All these will be enumerated here in order to 
complete, as far as possible, the catalogue of the Texan Cactacez. A correspon- 
dence with Prince Salm Dyck, than whom none is better acquainted with these 
curious plants, and his examination of living specimens of most of the species, ena- 
bles me to give this revision an authenticity not otherwise attainable. 
MAMMILLARIA. 
$ 1. Fructu viridi, ovali; corolla persistente ; testa seminum 
pergamentacea fusca; floribus ex axillis tuberculorum 
hornotinorum. 
M. catcarata (M. sulcata, Engelm. Pl. Lindh. l. ¢., non 
Pfeiffer). Near M. scolymoides, Schdw. but sufficiently dis- 
tinct, according to Prince Salm.— Rocky and hard, clayey 
