GLOSSARY OF TECHNICAL TERMS 



25 



The specimens once mounted and properly labelled are ready for 

 distribution in the herbarium, which in arrangement is quite the same as 

 a large card catalogue, the mounted herbarium specimens corresponding 

 to the cards of -the card catalogue. The whole herbarium can be arranged 

 according to the relationships or assumed relationships of the families, 

 genera, and species, or by the much simpler alphabetic method, first arranged 

 alphabetically as to families, second under each family alphabetically as to 

 the genera, and third under each genus of more than one species, alpha- 

 betically as to species. In practice a combination of the two methods will 

 probably be found to be the most convenient, arranging the farmilies accord- 

 ing to their natural order, but under each family arranging the genera 

 and species alphabetically. 



In small collections family covers of stout tough paper which, when 

 ■folded once, should be about the size of the herbarium sheets, should be 

 supplied. . The family name should be written on the lower left-hand corner 

 and all members of the family should be distributed into the family cover 

 or covers. In large herbaria it is usual to supply also genus covers, and 

 even species covers, but these are not necessary in small collections. For 

 temporary purposes specimens can very well be preserved between folded 

 sheets of thin paper, and for this purpose old' newspapers will serve very 

 well. 



For proper preservation the herbarium should be kept in tight cases 

 or boxes, as nearly insect- and dust-proof as possible. The cases should 

 be kept in a dry place and to repel possible insect attacks moth balls, 

 powdered naphthalin, or some other repellant should be placed with speci- 

 mens. If cases are made for the purpose they should be provided with 

 pigeon holes about 49 cm deep, 33 cm wide, and 16 cm high. 



In large herbaria it is customary to poison the specimens with corrosive 

 sublimate. This may be done by immersing the specimens before mounting 

 in a nearly saturated solution of corrosive sublimate in about 50 percent 

 alcohol and again drying the specimen, or the mounted specimen can be 

 painted over with the same solution by the use of a soft brush and then 

 dried. Great care must be taken, however, in handling the corrosive sub- 

 limate solution on account of its poisonous properties. 



GLOSSARY OF TB]CHNICAL TERMS 



A; in Greek compounds, without, as apetalouBf 



without petals. 

 Abnormal; contrary to the usual or the natural 



structure. 

 Abortive; imperfectly developed. 

 Abrupt; suddenly ending, as tliougli broken off. 

 Abruptly pinnate; » pinnate leaf ending with 



a pair of leaflets. 

 Acauleaoerit; with a very short or no stem 



above ground. 

 Acoessory; something additional. 

 Aocreient; growing larger after flowering. 

 Aohene; a small, dry, 1-seeded, indehiscent, 



seed-like fruit. 

 Aoloular; needle-shaped. 

 Aculeate; armed with prickles, as the stem 



of the rose. 

 Acumen; a tapering point. 

 Acuminate; tapering to a point, the sides 



incurved. .. 



Acute; sharply pointed, the sides straight, not 



incur^'ed. 



Adherent; frowing fast to another body. 

 Adnate; united or growing together. Applied 



to the anther when it is fixed by its whole 



length to the filament or its prolongation. 

 Ascending; rising gradually upward. 

 Adventitious; out of the proper or usual place; 



applied to recently introduced plants that 



are hardly naturalized. 

 Agaregate fruit; a fruit composed of many 



more or less united carpels produced by 



one flower. 

 Ala; a wing; the lateral petals in typical le-- 



guminous (papilionaceous) flowers. 

 Albumen; nourishing matter stored .within the 



seed. 

 Albuminous; furnished with albumen. 

 Alternate; one after another, as leaves placed 



on opposite sides of a stem, one at each 



node; when between bodies of the same 



or different sets of organs. 

 Ament: a slender, usually seal]', dense spike. 



