304 BOTANICAL GAZETTE. 
writer can not but fail to give the reader an adequate conception of the itn 
liancy of such garden scenery and of the astonishing luxuriance of vegeta ion. 
VW a SP Lik as ae CHER eis SPN | . “2 1 . a re an. 
AA02M¢M AMM CMO 
heads of giant trees, and the busy town itself, looked at from the neighboring 
cues * Ban 
i anas and mangoes a 
enty, and sell two for one cen he go, whi ripe is a delicious 
ruit, will be in its perfection in about a week, and will then sell much cheaper. 
» in a letter to Dr. Gray rites: ‘ ; , as i rth Amer 
lead, and shows off in great splendor. Think of specimens of this beautiful 
shrub 15 feet high, head 10 to 15 feet in diameter, with such an abundance 0 
crimson leaves (4 to 7 inches long) as to hide nearly all the green leaves. i 
season for mangoes came to a close about the first of August, to be succeeded by 
ery soon he commenced collecting specimens for the herbarium, the ferns, 
as usual, being the first to demand attention. Within five miles of his residence 
he found, within a few weeks, “about 70 species.” His aim was to make 50 sets 
for sale, and in the course of two months he had prepared more than 2,800 
ss, freshness of color and 
expression of characteristics” they were “all that could reasonably be desired 
a As a demand arose he collected many specimens of mosses, 
lichens and phanerogamous plants. 
Notes on the Conjugation of Spirogyra. 
BY JOE N. ROSE. 
During nearly two years study of the various species of Spi- 
rogyra, conducted in the botanical laboratory of Wabash College, 
my attention was repeatedly drawn to exceptional features in their 
conjugation. At Professor Coulter's request I have collected my 
notes upon this subject and figured the more striking cases. 1D 
explanation of the accompanying plate it should be said that it 
is entirely diagrammatic, with a view of bringing out the salient 
points, although most of the original drawings were made wit 
a camera. This text is intended to be little more than an explan~ 
ation of the figures, and but little interpretation of the facts 
attempted. =o 
Figure J. In this case (Sp. longata) a single well matured 
zygospore fills most of the larger (a) and part of the smaller () 
€ No evidence of conjugation other than through the 7 
tion between the two cells could be discovered. The old cel 
wall remaining somewhat firm accounts for the neck of the z¥8° 
