AVI ENUMERATIO GENERUM SYSTEMATICA. 
. Sphaerodium Pr. 1843 (tunbridgense). 
. Myrmecostylum Pr. 1843 tortuosum). 
. Ptychophyllum Pr. 1843 (dichotomum). 
Chilodium Pr. 1843 (denticulatum). 
moy ww» 
Il. DUBIAE. 
3. LOXSOMA R.Brown 1836. (Loxoma). — Species: 1. 
Typ. L. Cunninghami R.Br. 
4. LOXSOMOPSIS Christ 1904. — Species: 2. 
Typ. L. costaricensis Christ. 
IL. CYATHEACEAE. 
L. DICKSONIEAE. 
1. BALANTIUM kKaulfuss 1824 emend. — Species 3. 
Typ. Dicksonia culcita L'Hérit. 
1836. Culcita Pr. 
Dicksonia $ Eudicksonia pt. Hk. Bak. 1866. 
Dicksonia sp. Christ 1897. 
2. DICKSONIA LHéritier 1788 reduct. — Species: 17. 
Typ. D. arborescens L'Hérit. 
Balantium pt. Klf. 1824. Pr. 1836. 
Dicksonia 8 Eudicksonia pt. Hk. Bak. 1866. : 
Obs. Genus 1 Balantium Diels 1899 (non Presl 1836) certe Dicksonia 
rectius appellandum est, et genus 2. Dicksonia Diels — Balantium KIf. emend. 
Presl 1836 Balantium. ; 
3. CIBOTIUM kKaulfuss 1820. 1824. — Species: 9. 
Typ. C. Chamissoi KIf. 
1824. Pinonia Gaud. 1824. 
1827. Dicksonia sp. Desv. Hk, et Bak. 1866. 
1844. Hiatea Menzies. 
Dicksonia 8 Cibotium Hk. et Bak. 1866. 
IL THYRSOPTERIDEAE. 
4. THYRSOPTFRIS Kunze 1834. — pre 1. 
Typ. T. elegans Kze. 
? — Chonta Molina (non vidi). 
1836. PUUODAMENN Colla. 
