MR. R. A. ROLFE ON THE APOSTASIE EX. 215 
name. He remarks :—“ The four genera constituting this tribe 
differ so strikingly from the rest of the Order in their andrecium, 
that they have been proposed as forming one or two distinct 
natural orders. Now, however, that they are better known, they 
are found to be too closely connected together not to be united 
in a single tribe; and the importance of the single. character 
which separates them from Orchidew generally has fallen so much 
in:estimated value, that they have by common consent been re- 
united with that order as a distinct tribe only." This arrange- 
ment was also adopted in the * Genera Plantarum.’ 
In 1886 Ridley *, in describing a new species of Neuwiedia 
from New Guinea, again placed Apostasiee as a distinct natural 
order. 
Lastly comes Dr. Pfitzer's arrangement of the group t, which 
is as follows :— 
Ordo ARRHIZOGON 2 (Gynandrz). 
Fam. BURMANNIACE.E. 
Fam. ORCHIDACES. 
A. DraNDR=. 
1. Apostasiine. 
Gen. Apostasia, Neuwiedia. 
2. Cypripediline. 
Gen. Cypripedilum, Selenipedilum, Paphiopedilum $, 
Uropedilum ? §. 
B. Monanpee. 
(Including the remainder of the Orchidez.) 
In the present paper I have treated Apostasiee as forming a 
distinct tribe of Orchidez allied to Cypripediee, but differing 
* Journ. of Bot. 1886, p. 355. T, Nat. Anordn. Orch. p. 95. 
i Pfitzer, Morph. Stud. Orchideenbl. p. 11. This so-called genus is based on 
Reichenbach’s section Acaulia Coriifolia of Selenipedium (Xen. Orch. i. p. 3), 
and the section Coriacee of Cypripedium (Benth. and Hook. f. Gen. Plant. iii. 
p. 634), the character relied on being the connivent leaves. It is a strictly 
artificial group, as there is nothing in floral structure to separate it ; moreover, 
it contains species with a three-celled, and others with a one-celled ovary, 
beyond which there is nothing to keep these two genera, Cypripedium and 
Selenipedium, apart. The species of Paphiopedilum are tropical, and the dif- 
ference in leaf-character is probably due to the evergreen habit, most of the 
other species being temperate and deciduous. m 
$ Uropedium has already been shown to be simply a monster of Selenipedium 
caudatum, and not a genus. And surely in this, as in other cases above given, 
there is no sufficient reason for the (orthographical) ehange of name. 
