OOIR: Observatory of International Research

Papers

(The TQCC of Bradleya is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-05-01 to 2025-05-01.)

Article	Citations
Diversity in pollen structure in the dwarf succulent genus Conophytum N.E.Br. (Aizoaceae)	9
Interpopulational seed hydration memory does not affect seed germination of Xiquexique gounellei (F.A.C.Weber ex K.Schum) Lavor & Calvente subsp. gounellei (Cactaceae) under water deficit	7
A taxonomic update for Melocactus in Eastern Brazil	6
Further records of non-native succulents within Asparagaceae sensu lato as casual or naturalising aliens in Tunisia and North Africa	5
The discovery of dioecious Leuenbergeria lychnidiflora (DC.) Lodé (Cactaceae) in Guatemala	5
A note on the roots of Maihuenia (Cactaceae)	4
The taxonomy and nomenclature of Kalanchoe streptantha Baker (Crassulaceae subfam. Kalanchooideae)	3
Crassula sarcocaulis Eckl. & Zeyh. – variation and clones in cultivation.	3
A new species of Cumulopuntia (Cactaceae) from Peru	3
The Crassula atropurpurea complex from the southern and south-eastern Cape, a revised approach	2
Additional species of Agave (Agavoideae/Agavaceae, Asparagaceae sensu lat.) introduced and naturalising in Tunisia and North Africa	2
An update on Agave and Furcraea (Agavaceae; Asparagaceae sensu lato) escaped and naturalised in Madeira	2
New Zealand's non-native flora – friends or foes?	2
Aloe inyangensis var. lutea, a new yellow-flowering variety from Nyanga (Inyanga), north-eastern Zimbabwe	2
A review of Melocactus printed illustrations from drawings and paintings 1571–1923	2
Bulbine sceletium, a new cliff-dwelling Bulbine species (Asphodelaceae) from the Eastern Cape	2
Ceropegia europaea (Guss.) Bruyns, (Apocynaceae; Asclepiadoideae; Ceropegieae) in Tunisia: occurrence and conservation	2
Conservation status of the genus Aloe L. (Asphodelaceae) in Zimbabwe	2
Identity of Kalanchoe ‘Fang’ and K. ‘Rose Leaf’, two cultivars derived from K. ×edwardii (Crassulaceae subfam. Kalanchooideae), with notes on aspects of interspecific hybridisation in the genus	2
Native and non-native succulent plants in Algeria	1
The Glasgow Botanic Garden, William Jackson Hooker and succulent plants in the early nineteenth century	1
Melocactus and the Suringars of Leiden	1
Arrojadoa luetzelburgioides, a new species allied to A. multiflora (Cactaceae) and a key to the recently expanded genus	1
Halogeton sativus (Amaranthaceae, Subfam. Salsoloideae) new to the flora of Tunisia and a third record for the African continent	1
The ecological relationship between sap beetles and Pilosocereus Byles & Rowley (Cactaceae) in Northeastern Brazil	1

Gasteria disticha var. marxii, a new dwarf variety from the Western Cape Province, South Africa	1
South African members of Euphorbia and their conservation status	1
Are endangered cacti safe in Brazil?	1
Drosanthemum floribundum (Haw.) Schwantes: first record as a naturalised species in Algeria	1
Current conservation status of the genus Kalanchoe (Crassulaceae) in Kenya, East Africa	1
Casual, naturalised and invasive succulents of the Balearic Islands	1
Reinstatement of Kalanchoe [subg. Bryophyllum] sect. Alatae (Crassulaceae subfam. Kalanchooideae) for K. porphyrocalyx and K. uniflora, two Malagasy endemics	1
Crassula inopina, a new cliff-dwelling succulent species from Worcester, Western Cape, South Africa	1
THE AUTHORS	1
Cultivation as a conservation tool for cacti: review of the botanical evidence and a case study of Lophophora williamsii	1
×Rhipsatiora astra (Cactaceae). A new intergeneric hybrid between Rhipsalis cereuscula and Hatiora salicornioides which can exist in nature	1
Additions and corrections to Cacti of Eastern Brazil (4)	1
Peperomia subgenus Fenestratae: New taxa and nomenclatural changes	1
Editorial	1
The pollination ecology of Phemeranthus punae (Montiaceae) in southern Bolivia	1
Case studies of building collaborative partnerships for conservation of endangered and threatened cacti in Texas	1
Further records of opuntioid cacti (Opuntieae, Opuntioideae, Cactaceae) from Tunisia with a key and updated checklist of the species of the genus Opuntia in northern Africa	1
Occurrence and phylogeny of the endangered Texas endemic Echinocereus fitchii subsp. albertii	1
A reappraisal of succulent plant illustrations in early manuscripts 512 CE to the fifteenth century	1
Opuntia chiangiana (Cactaceae, Opuntioideae): A taxonomic re-evaluation and geographic distribution	1