Notes. 
119 
and the Selaginelleae and Isoeteae, united into the group Ligulatae, 
as the heterosporous forms of the Lycopodium-alliance. It is as 
follows : — 
Class I, Equisetaceae. 
„ II, Filicinae. 
Order 1. Stipulatae (inch Ophioglosseae, 
Marattiaceae, Osmundaceae ?, Schizae- 
aceae ?). 
„ 2. Filices. 
„ 3. Rhizocarpae. 
„ III, Dichotomae. 
Order 1. Lycopodiaceae (Lycopodieae, 
Psiloteae, Phylloglosseae). 
„ 2. Ligulatae (Selaginelleae, Isoe- 
teae). 
In the edition of the systematic portion of the Lehrbuch by Goebel 1 , 
the classification is in the main adhered to, though with some 
modifications. Thus, the class Equisetaceae is reconstituted as 
Equisetinae, certain heterosporous fossil forms probably belonging 
to this group being included. The orders of the Filicinae are 
arranged in two groups in accordance with the results of Goebel’s 
researches on the development of the sporangia: the majority of 
the Ferns being grouped with the Rhizocarpae (now termed Hy- 
dropterideae) as Leptosporangiate Filicinae, the remainder (Ophio- 
glosseae, Marattiaceae) constituting the Eusporangiate Filicinae. 
Sachs’ class Dichotomae is re-named Lycopodinae 2 , as Sachs’ name 
is misleading. There are three orders of Lycopodinae : Lycopodiaceae 
(. Lycopodium , Phjylloglossum), Psilotaceae ( Psilotum , Tmesipteris ), Ligu- 
latae (Selaginelleae, Isoeteae). The proposal is made to distinguish 
homosporous and heterosporous forms in the order Lycopodiaceae, 
the heterosporous forms being represented by the fossil genus 
Lepidodendron , but the value of this is questionable. Selaginella 
1 Goebel, Grundziige der Systematik, 1882; Outlines of Classification and 
Special Morphology, Oxford, 1887. 
2 It should be borne in mind that the term Lycopodinae had been previously 
used in a different sense by Link (Enumeratio, 1822) as the equivalent of Lycopo- 
diaceae of De Candolle. The order Lycopodineae was founded by Swartz (Syn. 
Fil. 1806) to include the genera Lycopodium , Tmesipteris , and Psilotum , and 
this term has since been used in many different senses by various writers. 
