NOVEMBER, 1923-] THE ORCHID REVIEW. 325 
four nearly equal pollen-masses, and a hornless column; but they have 
coriaceous, not thin half-transparent flowers, and a tough leathery lip, 
enlarged not contracted at the base. If they had a caudicle and gland to 
their pollen-masses, they would almost be Asiatic Maxillarias. Their flowers 
form neither horn nor spur, but are simply inflated and expanded at the 
base of the sepals.” 
THE GENUS ZYGOPETALUM. 
By C. H. LANKESTER, CARTAGO, COSTA RICA. 
HE article under the above heading in the June issue of the Orchid 
Review (p. 182), is a most interesting discussion of the group, which 
might have included mention of the other genera assigned to it, one of 
which, at least, Chondrorhyncha, has two or three species worthy of 
cultivation and most delightfully fragrant. 
As far as Costa Rican species are concerned, four only of the group 
have spectacular flowers: they are Warscewiczella aromatica, W. 
’ Wendlandii, Pescatorea cerina and Huntleya Burtii. Of these W. 
Wendlandii is a very hardy species and persists in practically open country, 
in hedgerows or the strips of woodland left in pasturelands, at elevations of 
5,500 to 6,500 feet on the Southern slopes of Irazu. Usually, one finds it 
rooted into the deep accretions of humus on the bolls of old polled 
Erythrinas, and the like, often in company with Odontoglossum Schlieper- 
janum, Nephrolepses and Polypodiums. All the species here prefer an 
abundant and rich rooting medium, though the Huntleya (which I have 
not seen in nature for twenty years), climbs the trunks of large forest trees 
in districts of exceptionally heavy rain-fall, not so favourable to the 
formation of humus. 
In general, they require moisture and plenty of shade. Pescatorea 
cerina and Warscewiczella aromatica are very hard to cultivate successfully 
away from their natural environment. All approve of basket culture and 
resent being broken up. The few specitnens of Warscewiczella that I saw 
in England were very small fragments and almost unrecognisable. 
Probably good strong clumps of these plants planted in baskets, with the 
base well built up with fern rhizomes, and then a loose compost of oak 
leaves worked into the roots would secure good growth and abundance of 
bloom. The carpets of leaves and moss in the New Forest should be 
splendid for these plants. Most of them, coming as they do from super- 
saturated forest regions, have extremely tender leaves, travel badly, and 
seem also subject to fungus and sun-scorch, loosing their leaves very readily. 
The two Warscewiczellas have supremely beautiful fowers. W. aromatica, 
which has a delightful perfume, comes from lower levels of 2,000 to 3,500 
