48 MISSOURI BOTANICAL GARDEN BULLETIN 
Like other members of the Umbelliferae—the natural 
family to which the plant belongs—the younger branches 
are rich in oil-secreting cells and oil tubes, so that the whole 
structure becomes completely infiltrated with a resinous con- 
tent. The dried specimen at hand has much the odor of old 
honeycomb or beeswax. Living specimens are said to have 
such a powerful odor that their presence can be detected even 
at some distance from the plant itself. The presence of such 
a large amount of resinous content and its exudation over 
the surface renders the Yareta of very considerable economic 
value, since it is gathered in quantity, taken to Arequipa and 
there used extensively for fire-wood. One correspondent 
writes that it is “brought down to Arequipa by the car load 
and forms the principal fuel of that town.” 
- GALCEOLARIAS AND GLOXINIAS 
The exhibition of a large variety of calceolarias and glox- 
inias in the Floral Display House during this month and 
the early part of May warrants some discussion of these plants 
at this time. 
Calceolarias—The common name for the numerous species 
and varieties of the genus Calceolaria is “slipper plant” or 
“slipper wort,” derived from its Latin name. However, as 
these terms are much better and more generally applied to 
the orchid Cypripedium, there seems no good reason for 
increasing the confusion by applying to the calceolarias any 
other than their real name. 
The plants shown at the Garden and usually grown b 
florists are of the herbaceous . These are practically all 
hybrids derived from wild species, obtained originally from 
South America. There is also a shrubby variety, used in 
England and on the Continent as a bedding plant, but this 
cannot be grown successfully in this latitude Tacamue of the - 
heat. Few greenhouse plants have been more improved dur-. 
ing recent years than the herbaceous calceolarias, both with 
respect to the constitution of the plant and the beauty of the 
flowers. The requirements of these plants are simple, and 
anyone possessing a growing place from which frost can be 
excluded without them being subjected to the abnormal 
drought of the average home, can cultivate them with 
success. 
Seeds of the herbaceous calceolarias may be sown in art 
June or July, but plants raised from June sowings generally 
give the best results. Equal parts of loam and leaf mold, to 
which has been added a little sand, make a suitable soil, 
and this should be well watered before planting the seed. 
