28 102, LYCOPODIUM. 



simple or one or more times similarly forked again), rarely simple; 

 sporophylla forming terminal spikes or the sporangia placed in the 

 axils of unaltered leaves all down the stem or branches; spores 

 foveolate or punctulate. — Engl. & Prantl, 1. c, fig. 371 C—D. 



a. Selago. Both barren leaves and sporophylla isomorphous or 

 nearly so, if heteromorphous, then the latter forming terminal 

 spikes and the barren region passing very gradually into the 

 fertile spikes, with the intermedial zone much more than 2 cm. 

 long. 



1. Euselago. Sporangia placed in the axils of unaltered leaves 

 all down the stem or branches, if aggregated in terminal 

 spikes, then the sporophylla not or hardly different in shape 

 from the barren leaves, though sometimes smaller. — Engl. 

 & Prantl, 1. c, fig. 372—374. 



2. Subsetago. Sporangia aggregated in terminal spikes, the 

 higher sporophylla different from, and commonly much smaller 

 than, the barren leaves, or distinctly ventricose and dilated 

 at the base ; lower sporophylla similar to the barren leaves. 

 — Engl. & Prantl, 1. c, fig. 375. 



b. Phlejgiuaria. Both barren leaves and sporophylla conspi- 

 cuously heteromorphous, the latter forming terminal spikes and 

 the barren region narrowed more or less abruptly into the 

 fertile spikes, with the intermedial zone very rarely more than 

 2 cm. long. — Engl. & Prantl, 1. c, fig. 377. 



1. PhlegmariopHs. Barren region not abruptly narrowed into 

 the fertile spikes. 



2. JEupMegmafia. Barren region rather abruptly narrowed 

 into the fertile spikes. 



§ 2. RHOPALOSTACHYS. Monopodially branched main stem present, the 

 branches remote, alternate, rarely simple, often compound, with 

 the spikes terminal or lateral, or the main stem simple, with the 

 spikes lateral ; spores reticulate or aculeate. — Engl. & Prantl, 1. c-, 

 fig. 371 A—B & E—H. 



a. L<epldoti8. At least the branchlets radially organized, with 

 the barren leaves isomorphous, regularly polystichous. 

 1. tiatefalia. Caudex (main stem) erect, at best creeping at 

 the base, simple or branched ; spikes lateral on the stem or 

 branches. (Not in Malaya). 



