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Journals and Conferences
BACKGROUND AND AIMS Laeliinae are a neotropical orchid subtribe with approx. 1500 species in 50 genera. In this study, an attempt is made to assess generic alliances based on molecular phylogenetic analysis of DNA sequence data. METHODS Six DNA datasets were gathered: plastid trnL intron, trnL-F spacer, matK gene and trnK introns upstream and dowstream… (More)
Sequences of the nuclear ribosomal internal transcribed spacer regions 1 & 2 (nrDNA ITS) including the intervening 5.8S region were analyzed cladistically for 43 individuals of 35 species ofScaphyglottis s.l. plus two outgroup taxa. Low levels of sequence divergence do not allow estimation of relationships among most clades, but the analyses indicate that… (More)
New species ofBletia from Mexico are described and illustrated:B. concolor, B. similis, andB. urbana. The identity ofB. campanulata Llave & Lex. is discussed, andB. reflexa Lindl. is considered to be a distinct species. Several South American epithets are treated as synonyms ofB. campanulata. A key to the recognized species ofBletia is given.
The genusBarkeria (Orchidaceae) consists of four species and eight subspecies (the treatment includes a key) of epiphytic plants endemic to Mexico and Central America.Barkeria is separated from the genusEpidendrum on the structure of the rostellum and column in the flower, plus shape of the pseudobulbs. The authors suggest thatBarkeria is most closely… (More)
Of the features reported to separate the subtribe Cryptoeentrinae from the Maxillariinae, only the presence of a spur is found to be consistent. The spur is believed to be homologous with the mentum ofMaxillaria, and this single difference is not considered an adequate basis for a subtribal distinction.Anthosiphon andSepalosaccus have been suggested as… (More)
The generaAmblostoma, Lanium, andStenoglossum are discussed, and it is concluded that all three should be included inEpidendrum.Lanium is treated as a section, and new names are proposed for two species whose epithets are preoccupied inEpidendrum: E. macrum (forAmblostoma gracile) andE. stiliferum (forLanium subulatum).
Only two species are known of the Mexican and Central American genus Meiracyllium, both described by H. G. Reichenbach, Jr . They are small creeping epiphytes with short unifoliate secondary stems that are scarcely thickened, but bear very fleshy oblong or elliptic-oblong leaves. Though small, the flowers are conspicuous by their bright rose-purple color,… (More)
The status of the genusEncyclia is reviewed, and this genus is compared withEpidendrum. As currently used,Epidendrum is a very heterogeneous assortment of species, resulting largely from the over-emphasis on certain “key characters.” If a greater emphasis is given to the internal coherence of the species groups within theEpidendrum alliance, about thirty… (More)