570 T. M. H. Almeida et al.
TABLE 1(Cont.) Taxon
Rhipsalis floccosa subsp. pulvinigera (G. Lindb.) Barthlott & N.P. Taylor Rhipsalis floccosa Salm-Dyck ex Pfeiff. subsp. floccosa Rhipsalis grandiflora Haw.
Rhipsalis hoelleri Barthlott & N.P. Taylor Rhipsalis lindbergiana K. Schum. Rhipsalis mesembryanthemoides Haw. Rhipsalis neves-armondii K. Schum. Rhipsalis oblonga Loefgr.
Rhipsalis olivifera N.P. Taylor & Zappi Rhipsalis ormindoi N.P. Taylor & Zappi
Rhipsalis pacheco-leonis subsp. catenulata (Kimnach) Barthlott & N.P. Taylor
Rhipsalis pacheco-leonis Loefgr. subsp. pacheco-leonis Rhipsalis pachyptera Pfeiff.
Rhipsalis paradoxa (Salm-Dyck ex Pfeiff.) Salm-Dyck Rhipsalis pentaptera A. Dietr. Rhipsalis pulchra Loefgr.
Rhipsalis puniceodiscus G. Lindb. Rhipsalis russellii Britton & Rose Rhipsalis shaferi Britton & Rose Rhipsalis teres (Vell.) Steud. Rhipsalis triangularis Werderm. Rhipsalis trigona Pfeiff.
Schlumbergera russelliana (Hook.) Britton & Rose Schlumbergera truncata (Haw.) Moran Selenicereus setaceus (Salm-Dyck) Berg
Strophocactus brasiliensis (Britton & Rose) S. Arias & N. Korotkova Tacinga braunii Esteves
Tacinga funalis Britton & Rose
Tacinga inamoena (K. Schum.) N.P. Taylor & Stuppy Tacinga saxatilis (Ritter) N.P. Taylor & Stuppy Tacinga subcylindrica M. Machado & N.P. Taylor Tacinga werneri (Eggli) N.P. Taylor & Stuppy Uebelmannia buiningii Donald Uebelmannia pectinifera Buining
Xiquexique gounellei subsp. zehntneri (Britton & Rose) Lavor & Calvente 1CR, Critically Endangered; EN, Endangered; VU, Vulnerable.
Significant progress has been made in the identification
of cultivated specimens in the Cactarium collection of the Rio de Janeiro Botanic Garden. In the previous inventory, in 2002, only generic names were listed, and except for the Cactaceae family all other plants were categorized simply as succulents. By 2022,almost 90% of records had been identi- fied to species and subspecies, with only 21 records identified to genus and only 15 records to family. Identifying specimens to species remains challenging because factors such as alti- tude, soil, temperature, precipitation and other, unknown, reasons could hinder flowering in the Garden. Flowering is often essential for accurate species identification, as repro- ductive structures are critical for distinguishing between closely related species (Hawthorne & Harris, 2006). Accur- ate plant identification is vital to increase the scientific
Number of specimens
Voucher present
6 Yes 2No 6 No 1 No 23 Yes 15 Yes 7 No 1 No 3 No 2 No 2No
5No 23 No 8 Yes 6 Yes 1 No 1 No 1 No 1 Yes 19 Yes 12 Yes 1 No 2 No 3 No 20 No 1 No 1 No 2 No 26 Yes 3 Yes 28 No 1 No 1 No 10 No 1 Yes
Brazil Red List1
IUCN Red List1
EN VU EN CR
EN CR
CR VU
EN EN
VU
CR EN
VU VU
CR EN
EN CR
EN
CR VU
value of the collection and its utility for research, education and conservation (Aplin, 2014). However, the Cactarium still faces several challenges. It is
currently at maximum capacity, with fully occupied green- houses and beds, and with no space for new acquisitions. In addition to the 16 species listed with .40 duplicates, many species have 20–40 duplicates. This duplication may be excessive given the current constraints on space. A botanic garden is an institution holding documented
collections of living plants for the purposes of scientific research, conservation, display and education (Smith & Harvey-Brown, 2017). Although undocumented plants have no utility for conservation, they can be used for scien- tific research, display and education. Making duplicates, even those undocumented, available to other Brazilian
Oryx, 2024, 58(5), 565–575 © The Author(s), 2024. Published by Cambridge University Press on behalf of Fauna & Flora International doi:10.1017/S0030605324000012
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