9 
be described as ‘‘leviter trilobatum’ 
P. guadalupensis. 
Pleurothalis Wilhamsii trom Panama is somewhat 
larger than P. Broadway both vegetatively and florally 
(especially with respect to the petals), but there seem to 
be no striking morphological differences between the two 
concepts. Moreover, there occur in Honduras and in 
Costa Rica plants closely similar to P. Williamsi and 
somewhat intermediate in character between it and P. 
Broadwayt. 
A closely allied species is the Costa Rican P. nana 
A. & S., which differs in having longer narrower sepals 
and asmaller lip. Moreover, judging from the description 
and floral analysis of the type, the Colombian P. /epan- 
thoides Schltr. seems to belong to this alliance. 
Pleurothallis Broadwayi appears to be variable in the 
number and size of the leaves, in the size of the flowers 
and in the proportion of the petals. 
as designated for 
In its present interpretation, Pleurothallis Broadwayt extends from 
Honduras (J.B. Edwards 546,599), Costa Rica (C.H. Lankester 1207, 
A.M. Brenes (3) 1484, Austin Smith H 541) and Panama (R.S. Williams 
976, type of P. Williamsii) to Cuba ( Luna 524), Guadeloupe ( Duss 
4192, type of P. guadalupensis), Martinique ( H.Stehlé 2139), Grenada 
(W.E. Broadway 1846, type of P. Broadwayi) and Venezuela, Island 
of Margarita (J.R. Johnston 237). 
Pleurothallis Broadway 4 mes var. tricarinata 
C.Schweinfurth var. nov. 
Haec varietas pedicellis longis et labello trilamellato 
et columna exalata a specie est separata. 
A Costa Rican variety of this widespread and variable 
species is characterized by the longer pedicels of the gen- 
erally fractiflex raceme, by the presence of a central keel 
between the lateral ones below the very fleshy apex of 
the lip and by the absence of distinct wings at the apex 
of the column. 
[ 42 | 
