taracuana Schltr. vegetatively, but has much longer se- 
pals and a dissimilar lip. The small size of the plant 
and the linear sharp-pointed leaves of Maaillaria tenuis 
are unusual. 
Loreto: Mishuyacu, near Iquitos, at 100 meters altitude, epiphyte 
in forest, February-March 1930, G, Klug 1045 (Tyee in U.S. Nat. 
Herb. No. 1456126). 
Maxillaria vandiformis (Sch/tr.) C. Schweinfurth 
comb, nov. 
Camaridium vandiforme Schlechter in Beih. Bot. Cen- 
tralbl. 42, Abt. 2 (1925) 137. 
Although the type of Camaridium vandiforme came 
from Brazil (Amazonas), several collections from eastern 
Peru are referable to this concept. In these specimens 
the leaves show greater range in size than that given for 
the type, the length being commonly shorter than the 
cited minimum of 12 em. and only rarely reaching the 
stated maximum of 18 cm.; also they are sometimes 8 
mm. in width (as contrasted with 5-6.5 mm., as cited). 
The flowers appear to be slightly larger than those de- 
scribed, the lateral sepals being 1.5—1.7 (instead of 1.4) 
cm. long. Moreover, all of the sepals are acute or short- 
acuminate (not subobtuse). Finally, the lip is complicate- 
acute (rather than truncate and obtuse with an apicule) 
and the pedicellate ovary attains 2.8 cm. in anthesis. 
It is possible that the Colombian Camaridium equitans 
Schltr., which is an earlier concept, may prove to repre- 
sent the same species, but the description of its leaves 
and especially the illustration of its lip (Schltr. ex Mansf. 
in Fedde Repert. Beih. 57 (1929) t. 68, nr. 242) show 
differences. 
Amazonas: near Napo, at about 100 meters altitude, August 2, 
1924, G. Tessmann 3737.—Loreto: lower Rio Huallaga, Santa Rosa, 
at 155-210 meters altitude, on tree trunk, November 11, 1929, Llew- 
elyn Williams 4908 (sterile specimen); vicinity of Iquitos, at 100 me- 
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