uary 10, 1922, Freeman & Williams s.n. (Herb. Trin. 10085); Trail 
to El Tucuche, January 2, 1948, Simmonds 240 (Herb. Trin. 14070); 
El Tucuche, March 27, 1955, Downs & Aitken 39 (Herb. Ames 67842). 
Maxillaria variabilis Bateman ex Lindley Bot. 
Reg. 23 (1837) sub t. 1986. 
Common throughout Middle America and known also 
from British Guiana, Mawillaria variabilis has apparently 
never been reported for the flora of Trinidad, notwith- 
standing the fact that the only two specimens of it which 
we have from the island were collected almost a century 
ago. 
Trinipap: January 9, 1864 (Herb. Trin. 1821); Cedros, July 4, 
1866, Ristoe s.n. (Herb. Trin. 2895); Tabaquite, January 13, 1955, 
Downs & Aitken 50 (Herb. Ames 67798). 
Noryuia Lindley 
The first dichotomy in Cogniaux’s key to the six spe- 
cies of Notylia which he recognized for Trinidad and 
‘Tobago is based on the presence and absence of a callus 
at the base of the lip. He separated Notylia punctata 
from the other five species because it alone had a callus. 
An examination of all material available from Trinidad 
indicates that a callus is present in every one of the 
species-concepts. According to Mr. Charles Schwein- 
furth, this character is very misleading and does not hold. 
Another character which Cogniaux has employed is the 
condition of the tips of the sepals: whether straight or 
revolute. This character is highly untrustworthy, for 
both straight and revolute sepal-tips can be found on 
flowers taken from a single inflorescence. Likewise, the 
length of inflorescence and the degree of union of the 
sepals seem to be extremely variable and unreliable char- 
acters. ‘The same variability has been found in the muti- 
cous and apiculate condition of the sepals. 
The following treatment of Notylia is proposed, inas- 
much as N. angustifolia and N. nana do not appear to 
present any really stable and fundamental differences 
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