COMPENDIUM 



OF THE FAMILIES, TRIBES AND. GENERA AS 

 FOLLOWED IN THIS WORK. 



See Malayan Fern Allies,' p. XI 



ORDER FILTCALES 



Green plants with 2 distinct generations, a pro-embryonal and an em- 

 bryonal, the pro-embryonal consisting of a minute, tuberous, flat or filiform, 

 green or white, simple, entire, incised or branched thalloid plant (prothallium) 

 with hair-like roots and bearing one or more, cf and (or) Q, tuberculiform 

 protuberances (antheridia, archegonia). The embryonal generation, i. e. the 

 iiormal, cormopbytical plant with 3 solid, short or elongate, rarely tuberous 

 stem (rhizome or caudex) and true roots, stalks (stipes) and leaves (fronds), 

 traversed by one or more fibro-vascular bundles and producing capsules (spo- 

 rangia) with spores, developed when a, ripe archegonium (9) is fecundated by 

 the spiral-shaped spermatozoids of a ripe antheridium (cT). Fronds seriate 

 or circiuate, rarely placed in whorls but then not connected, commonly more 

 strongly developed than I he stems, the fertile ones whether or not contracted, 

 rarely metamorphosed. (*) 



HIIBORDER I. FIIilCES (Isospore Filicales, True Ferns). 

 Spores uniform, producing independent prothallia on which are developed 



(*) The other fern-allies beinR also green plants with 2 generatiotis and fibro-vascular 

 bundles are readily distinguished from the FlUcales in having the fronds commonly less 

 strongly developed than the stems and by the following principal characters: 



Order Kqnlsetales. Fronds very small, in whorls, connected so as to form distinct, 

 toothed, longitudinally ribbed, tubular, ochrea-like organs enclosing the bases of the interno- 

 dations of the stems. Stems elongate, hollow. Sporangia placed on the under side of meta- 

 morphosed, scale-like, peltate, stalked sporojihylla forming terminal spikes. Spores uniform. 

 (1 Family). 



Order liycopodlales. Fronds various, seriate, circinate or in whorls, not connected. 

 Stems tuberous or elongate, solid. Sporangia solitary at the base of the fronds on the upper 

 side, superficial or imbedded. Sporophylla forming close or lax terminal spikes on an elongated 

 stem or placed tvith the barren fronds in a dense rosette surrounding a tuberous stem. 

 Spores uniform or dimorphtjus. (4 Families). 



