SUPPLEMENTAL OBSERVATIONS. 
By a lapse in transcribing the copy, which was not ob- 
served in correcting the press, in p. 27, 1. 28, I have stated 
Azalea to be triandrous by defect, which should have been 
printed pentandrous by defect ; and, in p. 39, line 2, by a like 
lapse, every Amary llidaceous leaf has been printed, which 
should have been every Amaryllidean leaf; that is, every leaf 
of the fourth suborder. 
Allium Cowani. — The statement (151) that Allium 
Cowanium had been found by Drummond in Texas was 
founded upon erroneous information from Glasgow, and proves 
to be incorrect. 
Alluvial Soil. — The soil which I recommend, under 
that name for the cultivation of Hippeastrum, Vallota, Ne- 
rine, &c., and even Cyrtanthus, is such as naturally inclines 
to produce crowfoot when it is in tillage. 
Alstrcemeria Cummingiana. — This plant, having been 
in flower the whole summer in a border in front of a green- 
house, which is protected by a mat in frosty weather, has still 
a stem of flowers in November, and another advancing, after 
a heavy fall of snow, and some days subsequent frost. This, 
and Hookeriana, which are nearly allied, seem to be the 
hardiest sorts yet introduced. The capsule of A. pulchra has 
a long and stout operculous point ; that of Cummingiana 
conforms more nearly with Hookeriana. 
Alstrcemeria Isabellana. — Very fine specimens of this 
plant have been just received by Sir W. Hooker, from Mr. 
Tweedie, who says it is one of the most beautiful flowers of 
Rio Grande ; the colour of the flowers orange tipped with 
green. His specimens have fuller and closer heads of 
flowers, which have preserved their colour, and some of the 
leaves are 5 inches long, and ^ an inch wide. They have a 
pale or yellowish cartilaginous margin. Folia suberecta, 
non resupinata, 2-5 unc. |-2 unc - ^ a ^ a ’ mai 'gi n e cartila- 
gineo, umb. sub- 16-flora, perianth, aurantiacum apice viridi. 
Found amongst the mountain marshes and rough pastures of 
Rio Grande. Very abundant near Portalegro. 
