A taxonomic study of the Pteridophyta of the Hawaiian Islands—IV 
WINIFRED J. ROBINSON 
(WITH PLATES T AND 2) 
LYCOPODIALES 
Terrestrial or epiphytic plants with spores produced in spo- 
rangia borne in the axils of scale-like leaves. 
Homosporo 
Sporangia esr LYCOPODIACEAE. 
porangia 2—3-celled. PSILOTACEAE. 
Heterosporous. SELAGINELLACEAE. 
LYCOPODIACEAE 
Plants with upright or procumbent stems; leaves small, simple, 
crowded, in 2-several ranks upon the stem; sporangia in the axils 
of sporophylls, which may be leaf-like or scale-like, these in some 
species aggregated to form terminal strobili; spores yellow, numer- 
LYCOPODIUM L. Sp. Pl. 1100. 1753 
Characters of the family. 
Type species: Lycopodium clavatum L. 
Vegetative leaves uniform 
Spo: yls not ievensaeen in strobili; stems usually erect. 
Stems tufted, often reddish; leaves coriaceous, entire, 
8-ran 
Leaves linear-lanceolate, patent, 8-ranked. L. erubescens 
eaves ovate-lanceolate, appressed, 6-ranked. ’ L. Haleakalae. 
Stems not tufted, green; leaves membranaceous, finely 
serrate, 4—6-ranked. L. serratum. 
Sporophyls aggregated in strobili; stems erect or pendulous. 
Leaves membranaceous, 3-ranked. L. Phlegmaria. 
Leaves coriaceous, in more than 3 ranks. 
Leaves 8-ranked; strobili simple, usually recurved. L. cernuum. 
Leaves 4—6-ranked; strobili often branched, not recurved. 
Leaves linear-lanceolate, 6-ranked; sporophyls lance- 
olate, decreasing somewhat in size from base to 
apex of strobilus. L. nutans. 
Leaves lanceolate, 4—6-ranked; sporophyls broadly 
ovate, uniform in size. L. phyllanthum. 
Vegetative leaves not uniform. 
