v : 
DRUMMOND'S NORTH AMERICAN MOSSES. 663 
natis caule cylindrico longioribus, sepalis oblongo-lanceo- 
latis acutiusculis calloso-apiculatis, petalis ovato-lanceo- 
latis acutis duplo latioribus, labelli trilobo cucullati lobis 
lateralibus apice valdé et oblique truncatis basi rotundatis, 
intermedio late rotundato emarginato edenticulato plano 
basi venis elevatis rugosis. 
Cattleya Walkeriana, Gardn. Herb. Fl. Bras. n. 5200. 
Han.—On the stem of a tree overhanging a small stream 
which falls into the Rio San Francisco, beyond the Dia- 
mond district, Brazil. , 
The flowers of this very fine species measure about four 
inches in diameter. It is nearly related to C. superba, 
(Schomb. in. Lindl. Sert. Orchid. t. 22) but is readily dis- 
tinguished by its much shorter pseudo-bulbs, and smaller 
leaves, by the larger and more rotund middle lobe of the 
labellum, but particularly by the obliquely truncated lateral 
lobes, which envelope only the lower half of the broadly 
winged column, and not the whole of it, as in C. superba. 
The specific name will serve to commemorate the services 
of Mr. Edward Walker, who accompanied me as an assistant 
during the last two years of my travels in Brazil, and by 
whose activity and intelligence I was enabled to make many 
additions to my collections which might otherwise have 
escaped my notice, of which the present plant is an example. 
Corrections and Remarks upon Drummonn’s First (Arctic 
and Canadian) Collection of Norta AMERICAN Mosszs, by 
Brucu and SCHIMPER. 
These corrections, &c., to the first collection of Drum- 
mond’s Mosses (in 2 vols. 4to.) were forwarded to me by 
Schimper a few weeks back, as the result of his and Bruch’s 
examination of my collection of Drummond's Mosses, with 
the permission to send them to you for insertion in the “Jour- ! 
nal" if I thought it advisable; and as it will serve as a 
* Concordance" between English and continental (German) 
