ORCHID STUDIES, XII 
BY 
Louis O. WitLtiams 
THE PRESENT number of the Orchid Studies is a col- 
lection of short generic observations which have been 
made during the past two years. Four subtitles make up 
the number, as follows: 1. Restrepia Humboldt, Bon- 
pland & Kunth, a consideration of generic validity. 2. 
Nageliella, a new name for the orchidaceous genus Hart- 
wegia Lindley. 3. The orchid genera Coelia Lindley 
and Bothriochilus Lemaire. 4. A new genus of the Or- 
chidaceae from Central America. 
1. Resrreera Humboldt, Bonpland & Kunth, 
A CONSIDERATION OF GENERIC VALIDITY 
The genus Restrepia, a member of that complex 
group of genera, the Pleurothallideae, recently came un- 
der observation when an attempt was made to write a 
generic description of it that would exclude all known 
variations of Pleuwrothallis. 
Restrepiawas first described by Humboldt, Bonpland 
and Kunth to contain an Andean plant for which they 
gave an admirable illustration. Krom that time (1818) to 
the present the genus ordinarily has been accepted with- 
out question; except by that master of generic definition 
George Bentham who apparently had some misgivings 
about the validity of the genus (cf. Journ. Linn. Soc. 
Bot. 22 (1881) 292), although he retained it in the Genera 
Plantarum. 
Species have been added to Restrepia by nearly all 
orchidologists who have worked with American Orchids: 
Lindley, Reichenbach filius, Rolfe, Schlechter and Ames 
& Schweinfurth. 
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