1886. ] : BOTANICAL GAZETTE. 135 
How to Collect Certain Plants. 
MESSRS. ENGELMANN, BEBB, BAILEY, SCRIBNER, MORONG, ay 
RAU ALLEN, SARGENT, pear PECK, RAVENEL, SEYM 
CUMM INGS AND BUT 
What is usually said about herborizing is intended to apply 
to the common flowering plants and ferns, and such others as 
readily adapt themselves to the same treatmen ere are 
classes of plants, however, for which these methods are inade- 
quate or not applicable, and it is -! supply information in rega 
to these that the following matter has fed brought together. It 
is given in the words of the authors whose names are appen 
each of whom is a specialist in the subject treated, and speaks 
from wide se pe —Epirors. 
Cactuses (Cactace®).—At the request of the editors of the Gazerre the 
following directions have been prepared by Professor Trelease from the manu- 
Script notes of the late Dr. Engelmann, which are made available through the 
courtesy of his son, Dr. Geo. J. Engelmann, of St. Louis 
Living cacti bear transportation well if young or medium sized specimens 
are selected. The entire plant, or, if large, a joint or cutting, is thrown in the 
shade for a few weeks to shrivel, after which the specimens are wrapped in 
dry hay or moss, and loosely packed in well-ventilated boxes. Treated in this 
way they preserve their vitality for from six to sixteen months. Seedlings are 
easily raised from seeds thoroughly dried and packed in situ. If the fruit is 
large and pulpy it is sliced to facilitate the wi de and should be kept from 
moisture, but exposed to a free circulation of a 
erbarium specimens are best made by ees the flowers from the 
plant and pressing them hese: in the ordinary way, after first sectioning 
Some of them. When not too large the fruit may be dried in the same way, 
otherwise it is halved ese excavated before being put in press, the seed being 
air-dried. The entire stem if small, or characteristic joints of it is compound, 
may be pressed till dry, after allowing it to shrivel, or if it is too large for this, 
& piece is removed showing the top, the insertion of several bunches of spines 
and of the flowers, and some of the tubercles or ribs. Sometimes it is n 
to split and excavate these specimens cross-sections dried under light- 
a 
Pressure are desirable. If the means of transportation permit, entire plants or 
lected p These “skeletons,” pre- 
the more 
°rnamental pressed fragments. When eagse it is also desirable to make 
Pp 
alcoholic specimens of the flower and fru 
Cacti are at best poorly preserved es we beobaetueht and should always 
