108 PRESENT-DAY GARDENING 
which should be treated like the species. Z. rostratum 
requires a warm, moist house. The Promenzas include 
P, stapelioides, P. Rollissoni, and P. «anthina. These should 
be grown in shallow pans, either for suspending or placing 
on a shelf near the glass of the roof. 
Bollea, Huntleya, Pescatorea, Batemannia, and War- 
scewiczella.—These are sectional names for a leafy class, 
with rudimentary pseudo-bulbs. They are frequently mis- 
managed. The plants should be grown in the potting 
materials recommended for epiphytal Orchids, and surfaced 
with Sphagnum-moss. Being evergreen, and with no 
superabundant vitality, they should be kept moist all 
the year, but liberally watered when growing. A moist 
corner of the intermediate house, or warm house, should 
be selected for them, each plant being raised on an inverted 
pan or pot. When grown in the warm house, a rest 
should be given in a cooler house after growth is com- 
pleted, but the plants must not be dried off. They may be 
propagated by division. All require shade. Botanically 
they are placed under Zygopetalum. 
