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Over six years and before his premature death in 1866, the German botanist Otto C. Berg described more than 2100 taxa of Myrtaceae, one of the ten richest plant families on Earth. He made the most fruitful contribution to the taxonomy of this family by describing the largest part of its known biodiversity in the Neotropics. The Herbarium of the Nat...
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... of the collection returned approximately 10,500 Myrtaceae vouchers, of which 835 (approx. 8%) were type specimens for a total of 547 O. Berg species and variety names included in 29 genera. Moreover, 8 specimens were types for 7 Bergian genera (Abbevillea, Britoa, Calycampe, Calyptromyrcia, Calyptropsidium, Orthostemon and Psidiopsis, marked with τ in the list below). This amounts for approximately 25% of Berg's total nomenclatural output. These vouchers were made by 41 collectors, outstanding among them J. Pohl (176 type specimens, 21%), G. Gardner (110, 13%), E. F. Poeppig (100, 12%) and F. Sellow (95, 11%) ( Fig. 1, for a complete list see Table 3). The majority of the Viennese materials were syntypes (359, 43 %) and isotypes (357, 42%) (Fig. 2), followed by holotypes (75, 9%), lecto-and isolectotypes (28, 3%). Sixteen specimens (2%) were recorded as "dubious", where lectotypification could not be verified, category of type could not be assigned, or original protologues or specimen labels were not clear. The vast majority of the Viennese materials were of Brazilian origin (643 vouchers, 77%), followed by Peru (49, 6%), Guyana (35, 4%), Suriname (28, 3%) and others (see Fig. 3). "Habitat ad Piedade prov. Minarum: Pohl 1031". Isotype:-Brazil: s. d., J.B.E. Pohl 1031 = Cat. no. 3042 (W-Herb. bras. ...
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Citations
... The terminology for morphological descriptions follows Radford et al. (1974) and Harris & Harris (2001). The years and page numbers of the publications of Otto C. Berg are cited based on McVaugh (1956) andEscobar García et al. (2015). ...
We herein describe two new species of Myrciaria (Myrtaceae) from the Brazilian Atlantic Forest, Myrciaria cambuca and M. una. The two species have long rusty trichomes on the branches and leaves, and were, for a long time, identified as Myrciaria ferruginea. Both are morphologically similar and can be separated by habit (Myrciaria cambuca is a small shrub vs. treelet or tree in M. una), internode length (0.8-2 vs. 3-6 cm long), leaf blade size (1.1-3.5 vs. 3.5-11.5 cm long) and shape (ovate vs. elliptic to elliptic-lanceolate), indumentum on the midrib (long trichomes abaxially vs. on both surfaces), number of secondary veins (8-12 vs. 11-22), number of flowers per inflorescence (2 vs. up to 5 flowers), flower bud shape (obovate vs. ovate), and fruit color (reddish vs. blackish) and indumentum (glabrous vs. pubescent) when ripe. Morphological differences between new species and other congeneric species also are provided. Myrciaria cambuca and M. una occur in coastal forests and are already under threat according to the criteria of the International Union for the Conservation of Nature-IUCN.
The ‘Myrcia guianensis group’, or Guianensis clade, comprises c. 30 species distributed mainly in the Cerrado and Atlantic Forest biomes of Brazil. The group is currently being monographed and during this process, type collections have been analysed and a thorough literature search completed; 36 new synonyms are recognised, and 95 lectotypifications and five neotypifications are made.
