errant species of Kpidendrum which should be referred, 
in a key erected on vegetative characters, to both the A- 
crotonae-Acranthae and to the Acrotonae-Pleuranthae. 
STUDIES IN PONTHIEVA 
BY 
Oakes AMES AND CHARLES SCHWEINFURTH 
Ponthieva chuquiribambae (A7iinz/.) Ames & 
Schweinfurth, comb. nov. 
Pleurothallis Chuquiribambae Kriinzlin in’ Ann. 
Naturhist. Mus. Wien 44 (19380) 327. 
On receipt of habit drawings and detailed floral a- 
nalyses of the type of Plewrothallis Chuquirtbambae trom 
the Reichenbach Herbarium at Vienna, it became very 
evident that this species is a typical member of the genus 
Ponthieva. The characteristically asymmetrical petals 
adnate, together with the lip, to the upper part of the 
column are diagnostic for Ponthieva and are quite dis- 
tinct from what obtains in the very distantly related 
genus Pleurothallis. 
This species, however, does not appear to be refer- 
able to any Ponthieva previously described. It is allied 
to the widespread P. maculata Lindl., particularly to the 
rather dwarf form of the plant found in Central America: 
but it differs in having apparently narrower connate lat- 
eral sepals and a dissimilar markedly unguiculate ovate- 
triangular lip. Furthermore, Ponthieva chuquiribambae 
appears to differ from the Peruvian P. vi/losa Lindl. in 
[ 38 | 
