64 REPORT ON TWO BOTANICAL COLLECTIONS FROM 



5-6 lin. long ; callus oblong, dilated and truncate at the apex. Column stout, free part 

 scarcely 2 lin. long, with a much longer foot. Mentum rounded, obtuse, 3 lin. long. 



Roraima : Kotinga Valley, 3IcC'omiell 8f Quelch, 137. — Endemic. 



Allied to the Colombian Maxillaria melina, Lindl., but the leaves smaller, sheaths 

 of the scape shorter, and with various differences in the structure of the flower. 



Maxillaria Qtjelchii, Rolfe, sp. n. Subcaulescens, vaginis imbricatis multistriatis. 

 Pseudobulbi compressi, apice monophylli. Folia oblonga, subobtusa, conduplicata. 

 Scapi foliis subtcquales, vaginis lanceolatis sul)iml)ricatis obtecti. Bractea lanceolata, 

 acuminata. Sepala oblongo-lanceolata, acuta. Petala lineari-lanceolata, acuta, 

 sepalis breviora. Labellum trilobum, lobis lateralibus erectis rotundato-oblongis 

 membranaceis, intermedio recurvo obovato-orbiculari obscure tricuspidato medio 

 carnoso lateribus incur vo, callo oblongo obtuso concavo. 

 Subcaulescent, with the stems clothed with conduplicate, triangular-lanceolate, acute, 

 closely striate, imbricating sheaths, 1-2 in. long, and partly enveloping the pseudobulbs. 

 Pseudobulbs compressed, broadly oblong, shining and puncticulate, wrinkled when old, 

 1 in. long, | in. broad, monophyllous at the apex. Leaves conduplicate, lanceolate- 

 oblong, subobtuse, 3-4 in. long, f-1 in. broad. Scapes 3-4 in. long, bearing 5-7 

 lanceolate, acute, striate, somewhat imbricating sheaths, 0-12 lin. long. Bract resembling 

 the sheaths, 10-12 lin. long. Sepals oblong-lanceolate, acuminate, lh in. long. Petals 

 linear-lanceolate, acuminate, 1| in. long. Lip h in. long, 3-lobed ; side lobes erect, 

 rounded-oblong, membranaceous, 1 lin. long, 1^ lin. broad; middle lobe recurved, 

 obovate-orbicular, obscurely tricuspidate at the apex, 2 lin. broad by nearly as long, 

 thickened along the centre and incurved at the sides ; crest oblong, obtuse, concave. 

 Column clavate, incurved, 3 lin. long. 



Roraima, summit, at 8600 ft, alt., Mc Council fy Quelch, 690.— Endemic. 

 Allied to the Peruvian M. floribunda, Lindl., but much less scandent, and smaller in 

 all its parts. 



Oncidium orthostates, Ridl in Trans. Linn. Soc. Ser. II. Bot. ii. (1S87), p. 283. 



Kwaimatta Savannah, McConnell §• Quelch, 281. Ireng River, im Thurn, 12.— Also 

 found at Mimatta, on the Rupununi River. 



Sobralia stenophylla. Lindl. Eol. Orch., Sobral. p. 2; Ridl. in Trans. Linn. Soc. Ser. II. 

 ii. (1887), p. 283. 

 Kotinga River, McConnell $~ Quelch, 117. Ireng Valley, McConnell 8f Quelch, 329. 

 Ipelemouta, Arapu River, im Thurn, 19. Roraima, Appnn, 1076. — Endemic. 



Epistephium lucidum, Cogn. in Mart. Fl. Bras. iii. pt. iv. p. 141, t, 30. 

 Roraima, upper slopes, McConnell 8f Quelch, 32.— Also found in Brazil. 



Epistephium parviflorim, Lindl. Gen. & Sp. Orch. p. 433. 



Kotinga Valley, McConnell Sf Quelch, 160. — Also found in Trinidad and elsewhere in 

 British Guiana. 



