130 THE ORCHID REVIEW. [May, 1910. 
under the name of Platyclinis, and now consists of over eighty species, a 
large number of novelties having recently been described from the Philip- 
pines by Mr. Oakes Ames. Several of the species are well known as very 
graceful garden plants. 
The remainder of the Ccelogynez have been placed elsewhere by Pfitzer, 
but as, with the exception of Calanthe, they are scarcely known in cultiva- 
tion they may be passed over. They are mostly from the great Indo- 
Malayan region. Calanthe is more allied to the Phaius group, where 
Pfitzer places it, together with Bletia, Chysis, Acanthophippium, Tainia, 
Spathoglottis, and a few others, some of which are included in Erie by 
Bentham. They have many points in common. 
The group contains terrestrial and epiphytic species. of very various 
habit, but they agree in having eight pollen masses, usually more or less 
connected at their points by a pollinary appendage and some viscus from 
the rostellum. Several of the genera have a distinct foot to the column, 
which is sometimes united to the lateral sepals, forming a mentum, while 
in Calanthe the lip has usually a long spur at the base. The group is very 
widely diffused. Bletia and Chysis are American, Calanthe is found 
throughout the Tropics, Phaius occurs from India and China to Australia 
and again in Africa, Ancistochilus is only African, and the rest are Indo- 
Malayan. 
The position of Thunia is obscure. Reichenbach considered it to be 
a genus of Arethusez, but Bentham united it with Phaius, while more 
recently Pfitzer has associated it with Arundina, Bletilla and Trichosma in 
a small group called Thuniinz. The fact is that the real-affinities of some 
of these genera have not been accurately worked out. 
Spathoglottis, Pachystoma and a few others were by Bentham associated 
with Eria and Phreatia in the subtribe Erie, but the two latter are placed 
by Pfitzer near to Dendrobium, because of the resemblance in habit, and 
the union of the lateral sepals to the foot of the column, forming a mentum; 
yet they are constantly different in having eight pollen masses, with their 
points more or less connected together. Eria is a very large and poly- 
morphic chiefly Indo-Malayan genus, of which a few species are frequently 
met with ‘in cultivation. The flowers are generally hairy. Phreatia has 
very minute, white or greenish flowers, and is chiefly known from dried 
specimens. It has a similar distribution except that there are several 
Polynesian species. 
Of the Old World Epidendrez there now remains the subtribe Dendrobiee, 
as defined by Bentham. In this there are either four collateral, more or less 
parallel and compressed pollen masses, without points or caudicles, or 
sometimes the four are reduced to two, by the more or less complete union 
of the two in each cell. The inflorescence is usually lateral, and the base 
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