Pseudocentrum in Peru
During a visit to the University of Aarhus (AAU) in July 2000, I was able to identify many of the institution's fine collections from Ecuador. Among them were four unidentified specimens of Pseudocentrum.
In the first orchid volume of the Flora of Ecuador, Garay recorded Pseudocentrum bursarium Rchb.f. without any vouchers, basing his opinion on the previous records of the species from Colombia and Peru. The following vouchers document the occurrence of P. bursarium in the provinces of Carchi and Napo.
ECUADOR: Prov. Carchi, ca. 3 km SW of El Carmelo, 3150-3350 m, 16 Apr. 1979, B. Løjtnant et al. 12615 (AAU!); Prov. Napo, S side of Cerro Sumaco, 2900-3050 m, 1-2 May 1979, B. Løjtnant & U. Molau 13045 (AAU!).
Garay cited a single voucher from province Imbabura for P. sylvicola Rchb.f. Two specimens at Aarhus and one collection at Kew extend the documented range of this species in Ecuador to include the provinces of Carchi, Napo, and Tungurahua.
ECUADOR: Prov. Carchi, ca. 3 km SW of El Carmelo, 3150-3350 m, 16 Apr. 1979, B. Løjtnant et al. 12614 (AAU!); Prov. Napo, S side of Cerro Sumaco, 2900-3050 m, 1-2 May 1979, B. Løjtnant & U. Molau 13046 (AAU!); Prov. Napo, Cerro Sumaco, 3200 m, 29 Apr. 1979, M. T. Madison 6886 (K!; SEL); Prov. Tungurahua, Road Patate to Leito to Llanganates range, 3000 m, 12 Apr. 1985, A. Hirtz et al. 2494 (K!; MO).
It's worth noting here that both species of Pseudocentrum were discovered in flower and growing together in Carchi and Napo. - Eric A. Christenson, 1646 Oak St., Sarasota, Florida 34236, USA.
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