Reference health
Phylogeny of the Herbaceous Tribe Spermacoceae (Rubiaceae) Based on Plastid DNA Data<sup>1</sup>
1 of 44 checkable references need attention · checked 2026-10-04
At the dated check, the references listed below either did not resolve in Crossref or DataCite, or carried a retraction notice. Each one is shown with the registry record that put it there.
22 with no DOI or arXiv id: not checked. A reference deposited without a DOI is checked only when it names an arXiv id, under that id’s DataCite DOI. The rest are never matched by title or guessed at; they stay outside the checked set, and this line says so.
References needing attention
does not resolve to a known work10.2307/2444283
The 43 checked references that resolve
resolves10.1663/0007-196X(2002)054[0040:RCABOA]2.0.CO;2
Relationships, circumscription, and biogeography of Arcytophyllum (Rubiaceae) based on evidence from cpDNA
resolves10.1111/j.1438-8677.1966.tb00207.x
REMARKS ON THE POSITION, THE DELIMITATION AND THE SUBDIVISION OF THE RUBIACEAE
resolves10.1016/S1055-7903(02)00446-3
Molecular phylogenetics of Houstonia (Rubiaceae): descending aneuploidy and breeding system evolution in the radiation of the lineage across North America
resolves10.1016/S0034-6667(00)00041-5
Pollen morphological survey of Pentas (Rubiaceae–Rubioideae) and its closest allies
resolves10.1080/001731302760156882
Pollen of African Spermacoce species (Rubiaceae) Morphology and evolutionary aspects
resolves10.2307/25065305
<i>Gomphocalyx</i>
and
<i>Phylohydrax</i>
(Rubiaceae): sister taxa excluded from Spermacoceae s.s., featuring a remarkable case of convergent evolution
resolves10.1663/0006-8101(2005)071[0354:PCATPS]2.0.CO;2
Palynological Characters and Their Phylogenetic Signal in Rubiaceae
resolves10.1093/aob/mcm085
Floral Ontogeny of the Afro-Madagascan Genus Mitrasacmopsis with Comments on the Development of Superior Ovaries in Rubiaceae
resolves10.5962/p.365992
Review of the Genus Oldenlandia L. (rubiaceae) and Related Genera in Australia
resolves10.1600/036364406775971796
Phylogenetics of <I>Impatiens</I> and <I>Hydrocera</I> (Balsaminaceae) Using Chloroplast <I>atpB-rbcL</I> Spacer Sequences
resolves10.2307/25065904
The systematics of Knoxieae (Rubiaceae)—molecular data and their taxonomic consequences
resolves10.2307/2394973
The Asian Genus Neanotis Nomen Novum (Anotis) and Allied Taxa in the Americas (Rubiaceae)
resolves10.1007/BF00986193
Phylogeny ofRubiaceae-Rubieae inferred from the sequence of a cpDNA intergene region
resolves10.5962/p.324602
Hedyotis Linnaeus versus Oldenlandia Linnaeus and the Status of Hedyotis lancea Thunberg in Relation to H. consanguinea Hance
resolves10.2307/2446534
Artificial hybridization in the Hawaiian endemic genus <i>Labordia</i> (Loganiaceae)
resolves10.2307/2419670
The Genus Ernodea (Rubiaceae) in the Caribbean Basin. II. Morphological Analyses and Systematics
resolves10.1111/j.1096-0031.1999.tb00277.x
The Parsimony Ratchet, a New Method for Rapid Parsimony Analysis
resolves10.1007/BF00990132
Phylohydrax (Rubiaceae-Spermacoceae)?a new genus to accommodate the African and Madagascan?Hydrophylax? species
resolves10.5962/bhl.part.11931
The genera of Cinchonoideae (Rubiaceae) in the southeastern United States
resolves10.1073/pnas.212646199
Overcredibility of molecular phylogenies obtained by Bayesian phylogenetics
resolves10.1007/BF00037152
Universal primers for amplification of three non-coding regions of chloroplast DNA
resolves10.2307/2807214
Oldenlandiopsis (Rubiaceae), a New Genus from the Caribbean Basin, Based on Oldenlandia callitrichoides Grisebach
resolves10.2307/3647351
Survey of Asian and Pacific species of
<i>Hedyotis</i>
and
<i>Exallage</i>
(Rubiaceae) with nomenclatural notes on
<i>Hedyotis</i>
types
resolves10.1600/036364405775097716
Resurrection of Genus <I>Kadua</I> for Hawaiian Hedyotidinae (Rubiaceae), with Emphasis on Seed and Fruit Characters and Notes on South Pacific Species
resolves10.1093/nar/25.24.4876
The CLUSTAL_X windows interface: flexible strategies for multiple sequence alignment aided by quality analysis tools
resolves10.1007/s00606-004-0155-x
Studies in the tribe Spermacoceae (Rubiaceae-Rubioideae): the circumscriptions of Amphiasma and Pentanopsis and the affinities of Phylohydrax
The 22 references with no DOI or arXiv id, listed, not checked
no DOI — not checkedi0026-6493-96-1-109-Bacigalupo1
no DOI — not checkedi0026-6493-96-1-109-Bremekamp1
no DOI — not checkedi0026-6493-96-1-109-Bremekamp2
no DOI — not checkedi0026-6493-96-1-109-Bremekamp3
no DOI — not checkedi0026-6493-96-1-109-Bremer1
no DOI — not checkedi0026-6493-96-1-109-Cabral1
no DOI — not checkedi0026-6493-96-1-109-Fosberg1
no DOI — not checkedi0026-6493-96-1-109-Fosberg2
no DOI — not checkedi0026-6493-96-1-109-Fosberg3
no DOI — not checkedi0026-6493-96-1-109-Jovet1
no DOI — not checkedi0026-6493-96-1-109-Mena1
no DOI — not checkedi0026-6493-96-1-109-Motley1
no DOI — not checkedi0026-6493-96-1-109-Robbrecht1
no DOI — not checkedi0026-6493-96-1-109-Robbrecht2
no DOI — not checkedi0026-6493-96-1-109-Robbrecht3
no DOI — not checkedi0026-6493-96-1-109-Schumann1
no DOI — not checkedi0026-6493-96-1-109-Terrell1
no DOI — not checkedi0026-6493-96-1-109-Terrell4
no DOI — not checkedi0026-6493-96-1-109-Terrell6
no DOI — not checkedi0026-6493-96-1-109-Terrell7
no DOI — not checkedi0026-6493-96-1-109-Terrell8
no DOI — not checkedi0026-6493-96-1-109-Wagner1
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