G. bufonia is a variety of the widespread and variable G. 
maculata. It is distinguished from the latter species by 
the total or partial absence of horns near the base of the 
hypochile. In some of its forms there does not appear to 
be a vestige of the horns which are so prominent in G. 
maculata; in the illustration of the type of G. bufonia 
(l. ce.) the horns are reduced to conical swellings, while 
some examples referable to this variety have rather well- 
developed conical protuberances. The variety bufonia 
appears to have often slightly larger flowers than G. 
maculata. Frequently, too, the hypochile is much lower 
at the base than at the apex. 
Whereas Gongora bufonia was tormerly credited only 
to Brazil, [ have recently examined numerous collections 
of this concept from the Peruvian departments of Loreto 
and San Martin. 
Xylobium foveatum ( Lindl.) Nicholson Dict. Gard. 
4 (1887) 225—Cogniaux in Martius FI. Bras. 8, pt. 5 
(1902) 469. 
Mawillaria foveata Lindley in Bot. Reg. 25 (1889) 
Mise. p. 2—Lindley & Paxton in Paxt. Flow. Gard. 
3 (1852-53) 70, sub no. 536. 
Mawillaria concava Lindley in Bot. Reg. 80 (1844) 
Mise. p. 4. 
Mawillaria stachyobiorum Reichenbach filius in Bot. 
Zeit. 10 (1852) 735. 
Xylobium concavum Hemsley in Godman & Salvin 
Biol. Centr.-Am. 8 (1883) 252. 
Xylobium stachyobiorum Hemsley in Godman & Sal- 
vin Biol. Centr.-Am. 8 (1888) 252. 
Xylobium Filomenoi Schlechter in Fedde Repert. 
Beih. 9 (1921) 100; ex Mansfeld in Fedde Repert. 
Beih. 57 (1929) t. 124, nr. 487. 
Judging from a photograph of the type of Mazillaria 
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