山羊百科，林文智老師的植物、山岳、攝影紀錄

• Cycas clivicola K.D.Hill is accepted；https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1007290-1
• Cycas clivicola K.D.Hill is an accepted name；http://www.plantlist.org/tpl1.1/record/kew-2749537

• Cycas clivicola K.D.Hill, Brittonia 51(1): 62 1999；Hill, K. D. and S.-L. Yang 1999 The Genus Cycas (Cycadaceae) in Thailand Brittonia 51: 48-73

Cycas petrae

• Cycas petraea A.Lindstr. & K.D.Hill；This species is accepted；https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:20012495-1
• Cycas petrae A.Lindstr. & K.D.Hill is an accepted name；http://www.plantlist.org/tpl1.1/record/kew-2749624

• Cycas petrae A.Lindstr. & K.D.Hill, Brittonia 54(4): 299 2003；Lindstrom, Anders Jan & K. D. Hill 2003 New species and a new record of Cycas (Cycadaceae) from Thailand Brittonia 54(4): 298-304