1997 IUCN Red List of Threatened Plants

Threatened and Endangered Cycad Species

Ceratozamia euryphyllidia Vazquez-Torres, Sabato & D. Stevenson. World status: Endangered (E). Mexico - Veracruz (E).
Ceratozamia hildae Landry & M. Wilson. World status: Endangered (E). Mexico - Queretaro (E); Mexico - San Luis Potosi (E).
Ceratozamia kuesteriana Regel. World status: Vulnerable (V). Mexico - Tamaulipas (V).
Ceratozamia latifolia Miq. World status: Vulnerable (V). Mexico - Hidalgo (V); Mexico - Queretaro (V); Mexico - San Luis Potosi (V).
Ceratozamia matudae Lundell. World status: Rare (R). Guatemala (V); Mexico - Chiapas (V); Mexico - Oaxaca (V).
Ceratozamia mexicana Brongn. World status: Indeterminate (I). Mexico - Hidalgo (I); Mexico - Puebla (I); Mexico - San Luis Potosi (I); Mexico - Veracruz (I).
Ceratozamia microstrobila Vovides & Rees. World status: Endangered (E). Mexico - San Luis Potosi (V).
Ceratozamia miqueliana H. Wendl. World status: Vulnerable (V). Mexico - Veracruz (V).
Ceratozamia norstogii D. Stevenson. World status: Vulnerable (V). Mexico - Chiapas (V).
Ceratozamia robusta Miq. World status: Rare (R). Belize (R); Guatemala (R); Mexico - Chiapas (R); Mexico - Veracruz (R).
Ceratozamia sabatoi Vovides et al. World status: Vulnerable (V). Mexico - Hidalgo (V); Mexico - Queretaro (V).
Ceratozamia zaragozae Medellin-Leal. World status: Endangered (E). Mexico - San Luis Potosi (E).

Chigua bernalii D. Stevenson. World status: Endangered (E). Colombia (E).
Chigua restrepoi D. Stevenson. World status: Endangered (E). Colombia (E).

Cycas beddomei Dyer, 11494. World status: Endangered (E). India - Andhra Pradesh (E).
Cycas brunnea K.Hill. World status: Rare (R). Northern Territory, Queensland (R).
Cycas cairnsiana F.Muell. World status: Vulnerable (V). Queensland (V).
Cycas celebica Miq. World status: Rare (R). Sulawesi (R).
Cycas chamberlainii W.H. Brown & Kienholz. World status: Vulnerable (V). Philippines (V).
Cycas conferta Chirgwin. World status: Vulnerable (V). Northern Territory, Queensland (V).
Cycas couttsiana K.Hill. World status: Rare (R). Queensland (R).
Cycas guizhouensis K. Lan & R. Zhou. World status: Vulnerable (V). China (V).
        Synonym(s): see Cycas szechuanensis C. Cheng & L.K. Fu.
Cycas hainanensis C.J. Chen & C.Y. Chen. World status: Vulnerable (V). Hainan Island (V).
Cycas hongheensis Yang & Yang. World status: Endangered (E). Yunnan Province, China (E).
Cycas megacarpa K.Hill. World status: Vulnerable (V). Queensland (V).
Cycas micholitzii Thisteton-Dyer. World status: Endangered (E). Guangxi (E); Vietnam (V).
Cycas multipinnata C.J. Chen & S.Y. Yang. World status: Endangered (E). Yunnan Province, China (E).
Cycas ophiolitica K.Hill. World status: Vulnerable (V). Queensland (V).
Cycas platyphylla K.Hill. World status: Vulnerable (V). Queensland (V).
Cycas seemannii A. Br. World status: Rare (R). Pacific Is. (R); Fiji (R); Tonga (R); Vanuatu (R).
Cycas silvestris K.Hill. World status: Vulnerable (V). Queensland (V).
Cycas szechuanensis C. Cheng & L.K. Fu. World status: Extinct (Ex). China (Ex).
        Synonym(s): Cycas guizhouensis K. Lan & R. Zhou.
Cycas taitungensis Shen. Hill. Tsod & Ohen. World status: Vulnerable (V). Taiwan (V).
Cycas taiwaniana Carruth. World status: Vulnerable (V). Hainan Island (V); Taiwan (E).
Cycas wadei Merr. World status: Endangered (E). Philippines (E).

Dioon califanoi De Luca & Sabato. World status: Endangered (E). Mexico-Oaxaca (V); Mexico-Puebla (V).
Dioon caputoi De Luca, Sabato & Vazquez-Torres. World status: Endangered (E). Mexico (E).
Dioon edule Lindley. World status: Rare (R). Mexico (R).
Dioon edule Lindley var. angustifolium (Miq.) Miq. World status: Rare (R). Mexico (R).
Dioon holmgrenii De Luca, Sabato & Vazquez-Torres. World status: Vulnerable (V). Mexico-Oaxaca (E).
Dioon mejiae Standley & L.O. Williams. World status: Vulnerable (V). Honduras (R); Nicaragua (R).
Dioon merolae De Luca, Sabato & Vazquez-Torres. World status: Vulnerable (V). Mexico (V).
Dioon purpusii Rose. World status: Vulnerable (V). Mexico-Oaxaca (V); Mexico-Puebla (R).
Dioon rzedowskii De Luca, A. Moretti, Sabato & Vazquez-Torres. World status: Vulnerable (V). Mexico-Oaxaca (E).
Dioon spinulosum Dyer. World status: Rare (R). Mexico-Oaxaca (R); Mexico-Veracruz (R); Mexico-Yucatan (R).
Dioon tomasellii De Luca, Sabato & Vazquez-Torres var. sonorense DeLuca, Sabato, V. Torres. World status: Rare (R). Mexico (V).
Dioon tomasellii De Luca, Sabato & Vazquez-Torres var. tomasellii. World status: Rare (R). Mexico (R).

Encephalartos aemulans Vorster. World status: Endangered (E). South Africa - Natal (E).
Encephalartos altensteinii Lehm. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos arenarius R.A.Dyer. World status: Endangered (E). South Africa - Cape Province (E).
Encephalartos brevifoliolatus P.Vorster. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos bubalinus Melville. World status: Vulnerable (V). Kenya (V); Tanzania (V).
Encephalartos caffer (Thunb.) Lehm. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos cerinus Lavranos & D.L.Goode. World status: Endangered (E). South Africa - Natal (E).
Encephalartos chimanimaniensis R.A.Dyer & I.Verd. World status: Endangered (E). Mozambique (E); Zimbabwe (E).
Encephalartos concinnus R.A.Dyer & I.Verd. World status: Endangered (E). Zimbabwe (E).
Encephalartos cupidus R.A.Dyer. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos cycadifolius (Jacq.) Lehm. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos delucanus Malaisse, Sclavo & Croisiers. World status: Vulnerable (V). Tanzania (V).
Encephalartos dolomiticus Lavranos & D.L.Goode. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos dyerianus Lavranos & D.L.Goode. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos equatorialis P.J.H.Hurter & H.F.Glen. World status: Indeterminate (I). Uganda (I).
        Synonym(s): Encephalartos imbricans P.Vorster & P.Heibloem.
Encephalartos eugene-maraisii I.Verd.. World status: Vulnerable (V). South Africa - Transvaal (V).
Encephalartos ferox Bertol.f.. World status: Rare (R). Mozambique (R); South Africa - Natal (R).
Encephalartos friderici-guilielmi Lehm.. World status: Vulnerable (V). South Africa - Cape Province (V); South Africa - Natal (V).
Encephalartos ghellinckii Lem.. World status: Vulnerable (V). South Africa - Cape Province (V); South Africa - Natal (V).
Encephalartos gratus Prain. World status: Vulnerable (V). Malawi (V); Mozambique (V).
Encephalartos heenanii R.A.Dyer. World status: Endangered (E). Swaziland (E); South Africa - Transvaal (E).
Encephalartos hildebrandtii A. Braun & Bouche var. dentatus Melville. World status: Rare (R). Tanzania (R); Uganda (E).
Encephalartos hirsutus P.J.H.Hurter & H.F.Glen. World status: Vulnerable (V). South Africa - Transvaal (V).
Encephalartos horridus (Jacq.) Lehm. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos humilis I.Verd. World status: Vulnerable (V). South Africa - Transvaal (V).
Encephalartos inopinus R.A.Dyer. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos kisambo Faden & Bentje. World status: Vulnerable (V). Kenya (V).
Encephalartos laevifolius Stapf & Burtt Davy. World status: Endangered (E). Swaziland (E); South Africa - Transvaal (E); South Africa - Natal (E).
Encephalartos lanatus Stapf & Burtt Davy. World status: Rare (R). South Africa - Transvaal (R).
Encephalartos latifrons Lehm. World status: Endangered (E). South Africa - Cape Province (E).
Encephalartos laurentianus De Wild. World status: Rare (R). Angola (R); Democratic Republic of Congo (R).
Encephalartos lebomboensis I.Verd. World status: Rare (R). Mozambique (V); Swaziland (V); South Africa - Transvaal (V); South Africa - Natal (V).
Encephalartos lehmannii Lehm. World status: Rare (R). South Africa - Cape Province (R).
Encephalartos longifolius (Jacq.) Lehm. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos manikensis (Gilliland) Gilliland. World status: Rare (R). Mozambique (R); Zimbabwe (R).
Encephalartos marunguensis Devred. World status: Endangered (E). Democratic Republic of Congo (E).
Encephalartos middelburgensis Vors., Robb. & S.van der Westh. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos msinganus Vorster. World status: Endangered (E). South Africa - Natal (E).
Encephalartos munchii R.A.Dyer & I.Verd. World status: Endangered (E). Mozambique (E).
Encephalartos natalensis R.A.Dyer & I.Verd. World status: Rare (R). South Africa - Natal (R).
Encephalartos ngoyanus I.Verd. World status: Vulnerable (V). Swaziland (V); South Africa - Transvaal (V); South Africa - Natal (V).
Encephalartos nubimontanus P.J.H.Hurter. World status: Endangered (E). South Africa - Transvaal (E).
Encephalartos paucidentatus Stapf & Burtt Davy. World status: Vulnerable (V). Swaziland (E); South Africa - Transvaal (V).
Encephalartos powysorum Beentje. World status: Vulnerable (V). Kenya (V).
Encephalartos princeps R.A.Dyer. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos pterogonus R.A.Dyer & I.Verd. World status: Endangered (E). Mozambique (E).
Encephalartos schmitzii Malaisse. World status: Endangered (E). Democratic Republic of Congo (E); Zambia (E).
Encephalartos sclavoi De Luca, D. Stevenson & Moreti. World status: Rare (R). Tanzania (R).
Encephalartos tegulaneus Melville. World status: Rare (R). Kenya (R).
Encephalartos transvenosus Stapf & Burtt Davy. World status: Rare (R). South Africa - Transvaal (R).
Encephalartos trispinosus (Hook.) R.A.Dyer. World status: Vulnerable (V). South Africa - Cape Province (V).
Encephalartos turneri Lavranos & D.L.Goode. World status: Endangered (E). Mozambique (E).
Encephalartos umbeluziensis R.A.Dyer. World status: Vulnerable (V). Mozambique (V); Swaziland (E).
Encephalartos venetus Vorster. World status: Endangered (E). South Africa - Transvaal (E); South Africa - Natal (E).
Encephalartos whitelockii P.J.H.Hurter. World status: Endangered (E). Uganda (E).
Encephalartos woodii Sander. World status: Extinct (Ex). South Africa - Natal (Ex.)

Macrozamia conferta D.L.Jones & P.I.Forster. World status: Vulnerable (V). Queensland (V).
Macrozamia crassifolia P.I.Forster & D.L.Jones. World status: Rare (R). Queensland (R).
Macrozamia fearnsidei D.L.Jones. World status: Vulnerable (V). Queensland (V).
Macrozamia johnsonii D.Jones & K.Hill. World status: Rare (R). New South Wales (R).
Macrozamia lomandroides D.L.Jones. World status: Endangered (E). Queensland (E).
Macrozamia macdonnellii (Miq.) A.DC. World status: Vulnerable (V). Northern Territory (V).
Macrozamia machinii P.I.Forster & D.L.Jones. World status: Rare (R). Queensland (R).
Macrozamia occidua D.L.Jones & P.I.Forster. World status: Vulnerable (V). Queensland (V).
Macrozamia parcifolia P.I.Forster & D.L.Jones. World status: Rare (R). Queensland (R).
Macrozamia platyrhachis Bailey. World status: Endangered (E). Queensland (E).
Macrozamia viridis D.L.Jones & P.I.Forster. World status: Vulnerable (V). Queensland (V).

Microcycas calocoma (Miq.) A. DC. World status: Vulnerable (V). Cuba (V).

Stangeria eriopus (Kunze) Baill. World status: Rare (R). Swaziland (E); South Africa - Cape Province (R); South Africa - Natal (R).

Zamia acuminata Oerst. ex Dyer in Hemsl. World status: Rare (R). Costa Rica (V); Nicaragua (R); Panama (R).
Zamia amplifolia Hort. ex Masters. World status: Rare (R). Colombia (V); Ecuador (V).
Zamia angustifolia Jacq. World status: Rare (R). Bahamas (V); Cuba (V).
Zamia angustissima Miq. World status: Vulnerable (V). Cuba (V).
Zamia boliviana (Brongn.) A. DC. World status: Rare (R). Bolivia (R).
Zamia chigua Seem. World status: Rare (R). Panama (V); Colombia (V).
Zamia cremnophila Vovides, Schutzman & Dehgan. World status: Vulnerable (V). Mexico - Tabasco (V).
Zamia cunaria Dressler & D. Stevenson. World status: Vulnerable (V). Panama (R).
Zamia dressleri D. Stevenson. World status: Endangered (E). Panama (V).
Zamia fischeri Miq. World status: Vulnerable (V). Mexico - Nuevo Leon (V); Mexico - Queretaro (V); Mexico - San Luis Potosi (V); Mexico - Veracruz (V).
Zamia furfuracea L.f. in Aiton. World status: Vulnerable (V). Mexico - Veracruz (V).
Zamia herrerae Calderon & Standley. World status: Rare (R). El Salvador (E); Guatemala (E); Honduras (E); Mexico - Chiapas (E).
Zamia inermis Vovides, Rees & Vazquez-Torres. World status: Vulnerable (V). Mexico - Veracruz (E).
Zamia ipetiensis D. Stevenson. World status: Vulnerable (V). Panama (V).
Zamia kickxii Miq. World status: Rare (R). Cuba (R).
Zamia manicata Linden ex Regel. World status: Rare (R). Panama (R); Colombia (V).
Zamia montana A. Br. World status: Vulnerable (V). Colombia (V).
Zamia monticola Chamberlain. World status: Extinct (Ex). Mexico (Ex).
Zamia muricata Willd. World status: Rare (R). Colombia (I); Venezuela (R).
Zamia obliqua A. Br. World status: Indeterminate (I). Panama (V); Colombia (R).
Zamia paucijuga Wieland. World status: Rare (R). Mexico (R).
Zamia picta Dyer. World status: Rare (R). Belize (R); Guatemala (R); Mexico (V); Mexico - Chiapas (R).
Zamia portoricensis Urban. World status: Vulnerable (V). Puerto Rico (V).
Zamia pseudomonticola L.D. Gomez. World status: Vulnerable (V). Costa Rica (R).
Zamia pseudoparasitica Yates in Seem. World status: Vulnerable (V). Panama (V).
Zamia purpurea Vovides, Rees & Vazquez-Torres. World status: Endangered (E). Mexico - Oaxaca (E); Mexico - Veracruz (E).
Zamia pygmaea Sims. World status: Rare (R). Cuba (R).
Zamia roezlii Linden ex Regel. World status: Rare (R). Panama (V); Colombia (V); Ecuador (V).
Zamia skinneri Dietr. World status: Rare (R). Costa Rica (V); Nicaragua (V); Panama (V); Colombia (V).
Zamia soconuscensis Schutzman, Vovides & Dehgan. World status: Vulnerable (V). Mexico - Chiapas (V).
Zamia spartea A. DC. World status: Endangered (E). Mexico (E); Mexico - Oaxaca (V).
Zamia splendens Schutzman. World status: Vulnerable (V). Mexico - Chiapas (V).
Zamia standleyi Schutzman. World status: Rare (R). Honduras (R).
Zamia sylvatica Chamberlain. World status: Endangered (E). Mexico (E); Mexico - Oaxaca (V).
Zamia tuerckheimii J.D. Smith. World status: Rare (R). Belize (I); Guatemala (I); Honduras (I).
Zamia vasquezii D. Stevenson. World status: Endangered (E). Mexico - Veracruz (E).
Zamia verschaffeltii Miq. World status: Endangered (E). Mexico - Chiapas (E).
Zamia wallisii A. Br.. World status: Vulnerable (V). Colombia (V).

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